Антонюк Віктор Степанович

Automated Control System for the Drilling Process in Carbon Plastic Parts

V. Antonyuk, S. Vysloukh, M. Filippova, O. Matoshyn, and O. Voloshko, “Automated Control System for the Drilling Process in Carbon Plastic Parts,” Lecture Notes in Electrical Engineering, vol. 1570 LNEE, pp. 289–298, 2026, doi: 10.1007/978-3-032-18415-3_30.

The paper examines how to improve the efficiency of hole machining in components made from polymer composite (carbon-fiber) materials. Building on a review of drilling methods and techniques used for carbon-fiber parts, which provide the specified parameters of surface roughness and delamination, it was found that for this very purpose it is advisable to use automated control of quality parameters in the machining process. A structural block diagram of the automated system has been created as a closed-loop adaptive control scheme, in which real-time surface-quality metrics – roughness and delamination – are inferred from the measured axial cutting force of the workpiece. Measurement of the axial cutting force and adjustment of its values are implemented using a feed that provides the required values of roughness and delamination. In this case, the values of the cutting speed and feed are set as a result of solving the optimization problem for drilling conditions according to the criterion of maximum productivity of the technological process. The information, mathematical and software support of the automated control system has been developed and its necessary technical means have been selected. The system’s performance was assessed through computer modeling that used randomly generated axial forces under multiple drill-point angles and rotation speeds.

IDENTIFICATION OF TRIBOLOGICAL PROPERTY FORMATION MECHANISMS IN CARBON FIBER-MODIFIED AROMATIC POLYAMIDE COMPOSITES

O. Dykha, G. Sirenko, V. Svidersky, V. Antonyuk, and M. Dykha, “IDENTIFICATION OF TRIBOLOGICAL PROPERTY FORMATION MECHANISMS IN CARBON FIBER-MODIFIED AROMATIC POLYAMIDE COMPOSITES,” EUREKA, Physics and Engineering, vol. 2026, no. 3, pp. 135–151, 2026, doi: 10.21303/2461-4262.2026.004106.

The object of research is polymer composite materials for tribotechnical purposes based on aromatic polyamide phenylone C-2, designed for operation in dry and boundary friction conditions. The relevance of the work is due to increase the wear resistance of friction units at high loads and temperatures, where the use of traditional polymers is limited. A promising direction for solving this problem is the structural modification of aromatic polyamides with carbon fillers. The work develops a structural and technological approach to the formation of polymer composite materials based on phenylone C-2 and determines rational modes of the main technological operations. A set of experimental researches of the physical, mechanical and tribotechnical properties of compositions filled with different types of carbon fibers has been carried out. It is shown that the composite material of the Graphelon-20 type in terms of the totality of strength characteristics, friction coefficient and wear resistance is superior to compositions modified with fluoroplastic and molybdenum disulfide. It was established that the effect of low friction is due to the formation of a stable surface layer in the contact zone, associated with the presence of a two-dimensional turbostratic structure in carbon fibers capable of ther-momechanical improvement and tribochemical transformations. It was shown that the introduction of up to 20% of graphitized fibers based on hydrated cellulose or high-modulus fibers based on polyacrylonitrile provides an optimal combination of physical, mechanical and tribotechnical properties. The results obtained can be used in the creation of wear-resistant polymer composite materials for parts of friction units of industrial equipment.

Investigation of the Mechanism of Transition Zone Formation in the Surface Layer of Ceramic Components of Precision Devices

Y. Bondarenko, M. Bondarenko, V. Antonyuk, S. Vysloukh, and O. Voloshko, “Investigation of the Mechanism of Transition Zone Formation in the Surface Layer of Ceramic Components of Precision Devices,” Lecture Notes in Mechanical Engineering, pp. 279–289, 2026, doi: 10.1007/978-3-032-14926-8_24.

The study is dedicated to analyzing the mechanism of transition zone formation in the surface layer of ceramic components used in precision devices and evaluating its impact on the operational characteristics of the products. The research examines the key physico-mechanical factors contributing to the formation of the transition layer, including temperature fluctuations, mechanical loads, phase transformations, and chemical interactions with the surrounding environment. A comparative analysis of various types of ceramics (Si3N4, SiC, ZrO2, Al2O3, TiO2, WC-Co) was conducted to assess the formation rate and critical thickness of the transition layer. It was established that, regardless of operating conditions, the transition zone increases over time, leading to higher porosity, reduced mechanical strength, and increased internal stresses within the material. Experimental studies have confirmed the negative impact of the transition layer on the durability of ceramic components, particularly in high-load environments. Recommendations have been proposed to minimize the effects of the transition zone, particularly through the optimization of material composition and technological processing methods. The obtained results hold significant practical value for enhancing the reliability of ceramic bearings, seals, medical implants, and other precision components, ensuring their long-term stability and performance in demanding operational conditions.

Mathematical Modeling of Permissible Thermoelastic Stress Distribution in Optical Elements of Electrical Power Systems

I. V. Yatsenko, V. S. Antonyuk, V. A. Vashchenko, V. I. Gordienko, V. P. Maslov, and T. I. Butenko, “Mathematical Modeling of Permissible Thermoelastic Stress Distribution in Optical Elements of Electrical Power Systems,” Journal of Nano- and Electronic Physics, vol. 18, no. 1, 2026, doi: 10.21272/jnep.18(1).01004.

Mathematical models have been developed to describe the thermal influence of a strip electron beam (SEB) on optical elements, taking into account the results of beam sensing, the geometric shape and dimensions of the elements, as well as the temperature dependence of the thermophysical properties of the optical material (volumetric heat capacity and thermal conductivity coefficient), which makes it possible to more accurately calculate the temperature and thermoelastic stress distributions across the thickness of the optical element in the regions of maximum external SEB influence. The proposed models make it possible to more accurately calculate the effect of controllable parameters of the electron-beam installation (beam current, accelerating voltage, distance to the treated surface, and SEB scanning speed) on the distribution of thermoelastic stresses across the thickness of the elements and to determine the permissible ranges of their variation, the exceedance of which leads to the destruction of the elements and failure of electrical power system components based on them. This makes it possible to increase the efficiency of final surface treatment of optical components made of optical ceramics using SEB technology, with the aim of improving the mechanical strength of their surface layers, which ultimately enhances the reliability, safety, and stable operation of electrical power system components under extreme electrical and thermal loads.

Preface

C. Bazilo, M. Bondarenko, E. Faure, V. Antonyuk, A. Dzierwa, and L. Usyk, “Preface,” Lecture Notes in Electrical Engineering, vol. 1570 LNEE, pp. v–vi, 2026.

Analysis of Modern Approaches to Approbation of Aircraft Parts Geometric Data Digitization by Reverse Engineering

K. Maiorova, I. Lysochenko, O. Skyba, A. Suslov, and V. Antonyuk, “Analysis of Modern Approaches to Approbation of Aircraft Parts Geometric Data Digitization by Reverse Engineering,” Lecture Notes in Networks and Systems, vol. 1480 LNNS, pp. 264–273, 2025, doi: 10.1007/978-3-031-95191-6_25.

The article examines the implementation of the obtained data approbation of the aviation parts digitization by reverse engineering by determining the permissible deviations in the geometric dimensions of the part, which are made according to its scan or digital model using additive technologies. It was found that the actual geometric accuracy of the manufactured surface of an aircraft part differs from the nominal surface, which in the case of conventional reverse engineering is specified by a digital model of the part, and in the case of sustainable reverse engineering – by a description of the part. When there are no instructions on the permissible deviations of the form and location of the surfaces, it is suggested that deviations limited by the tolerance field to the measured size are used. It was determined that when approving the obtained geometry (digital mock-up or portrait) by reverse engineering, the main factors are the minimization of the use of material and time for trial samples that are proportionally reduced in size, as well as the existence of a fleet of necessary equipment – 3D printers and 3D scanners. The scientific novelty of the obtained results is in the development of the technology of prototyping the complex-profile and convex-concave aircraft parts of any size by reverse engineering via testing the obtained geometry on samples of proportionally reduced sizes, where the tolerance fields for the nominal sizes of the reduced sample and the manufactured part are pre-defined.

Determination of Areas on the Surface of Optical Fairings of Various Geometric Shapes Subjected to Maximum Thermal Shock Impacts

I. V. Yatsenko, V. S. Antonyuk, V. А. Vashchenko, V. I. Gordienko, S. О. Kolinko, and Т. І. Butenko, “Determination of Areas on the Surface of Optical Fairings of Various Geometric Shapes Subjected to Maximum Thermal Shock Impacts,” Journal of Nano- and Electronic Physics, vol. 17, no. 1, pp. 1–7, 2025, doi: 10.21272/jnep.17(1).01030.

Mathematical models have been developed to describe the heating of optical fairings of infrared (IR) devices with various geometric shapes (hemispherical, pyramidal, etc.) under the influence of an external supersonic airflow. Areas on the surface of the fairings subjected to maximum thermal shock impacts have been identified for different flow regimes (laminar, turbulent), which lead to their destruction and IR device failures during firing and flight conditions. The advantages and disadvantages of the considered fairing geometries have been established depending on their flight speed. It has been established that, for the specified ranges of flight velocities, as in the case of hemispherical fairings, a turbulent flow regime is realized over most of their surfaces, and hazardous areas emerge. By additionally treating these areas with an electron beam (which increases the resistance of surface layers to thermal and mechanical impacts), their destruction during operation can be prevented. In this case, the intensity of the pressure gradient’s impact on the fairing is reduced. Therefore, during the operation of fairings with different geometric shapes at high flight speeds (above 2∙103…3∙103 m/s), the thermal and mechanical impact (due to pressure gradients in the shock wave) is more intense for fairings with sharp leading edges (pyramids, cones, etc.), leading to their faster destruction under flight conditions.

Modeling and Optimization of the Drilling Holes in Carbon Fiber Reinforced Polymer Parts

O. Matoshyn, S. Vysloukh, V. Antonyuk, and O. Voloshko, “Modeling and Optimization of the Drilling Holes in Carbon Fiber Reinforced Polymer Parts,” Lecture Notes in Mechanical Engineering, pp. 300–310, 2025, doi: 10.1007/978-3-031-82746-4_27.

The article deals with modeling the quality parameters of holes while drilling carbon fiber-reinforced polymer parts. It is noted that the mechanical processing of polymer composite materials is the most challenging operation due to the anisotropic properties of the material, the heterogeneous structure, and the abrasive nature of the fibers. It was established that the determining factors of the quality of the surface layer of the composite are delamination and roughness of the treated surface, for the determination of which mathematical dependences on drilling modes and drill parameters were researched in the work. A mathematical model of the drilling process of parts from carbon fiber-reinforced polymer is provided. The optimality criterion is the maximum productivity of processing holes with restrictions on their quality parameters. The proposed model allows you to determine the optimal drilling modes for the given parameters of the processed material and processing conditions. The practical implementation of solving the problem of optimizing carbon fiber reinforced polymer drilling modes, which ensures obtaining the necessary quality parameters – hole delamination and surface roughness, has been carried out.

Modeling the Electrical Impedance of Spherical Piezoceramic Devices for Microelectronic Systems

C. Bazilo, V. Andreiko, V. Antonyuk, I. Bondarenko, and M. Bondarenko, “Modeling the Electrical Impedance of Spherical Piezoceramic Devices for Microelectronic Systems,” Lecture Notes in Networks and Systems, vol. 1480 LNNS, pp. 296–305, 2025, doi: 10.1007/978-3-031-95191-6_28.

This study presents a comprehensive mathematical model for analyzing the electrical impedance of spherical piezoceramic devices, which are increasingly utilized in modern microelectronic systems. Spherical piezoceramic shells’ unique geometric and physical properties enable enhanced sensitivity, reduced electrical impedance, and improved operational stability compared to cylindrical and disk-shaped counterparts. The research investigates the relationship between key operational parameters, including frequency, material properties, and geometric dimensions, and their impact on impedance characteristics. The mathematical model uses harmonic oscillation equations and accounts for dynamic boundary conditions and electric potential distributions across hemispherical surfaces. Numerical simulations reveal that spherical piezoceramic shells exhibit a 1.3–1.6 times higher quality than cylindrical elements and 2–2.5 times higher than disk-shaped elements. Additionally, a sharp reduction in electrical impedance – by 2–3.5 times – was observed at electromechanical resonance frequencies. Experimental validation confirmed that spherical elements demonstrate 20–30% greater resistance to mechanical deformations and 15–25% lower susceptibility to local resonances, significantly improving vibration accuracy and operational stability. The proposed model allows precise prediction of impedance-frequency dependencies and optimization of spherical piezoceramic devices for various high-frequency applications, including telecommunications, medical diagnostics, and automated control systems. These findings provide a foundation for further integrating spherical piezoceramic elements into advanced microelectronic technologies, ensuring their efficiency, durability, and adaptability across diverse operational conditions.

p-i-n Photodiode with a p+Guard Ring

D. O. Novikov, M. S. Kukurudziak, A. O. Voronko, M. S. Solodkyi, and V. S. Antonyuk, “p-i-n Photodiode with a p+Guard Ring,” Journal of Nano- and Electronic Physics, vol. 17, no. 5, 2025, doi: 10.21272/jnep.17(5).05018.

This paper presents the development and analysis of a silicon single-element p-i-n photodiode with a p+-type guard ring that is isotopically identical to the substrate. The proposed structural solution facilitates the fabrication process, ensures better parameter stability, and reduces the effect of surface inversion channels on dark current and device sensitivity. The base material was high-resistivity (18 – 22 kΩ·cm), dislocation-free, monocrystalline p-type silicon with a <111>orientation. The device manufacturing process followed diffusion– planar technology, including consecutive formation of the p+guard ring and the n+light-sensitive region. Preliminary modeling of diffusion processes confirmed the absence of cross-doping between regions, revealed the dependence of dopant concentration profiles on depth, and also estimated the redistribution of dopant at the interface between materials during thermal-oxidative annealing and its subsequent changes during the diffusion stage. Measurements included both dark-current and photocurrent I-V characteristics, obtained at various wavelengths, in addition to the spectral response. The investigated photodiode demonstrated peak sensitivity around 950 – 970 nm with a quantum efficiency approaching 0.9, while at the YAG laser wavelength the QE was reduced to about 0.4. Full depletion of the space-charge region across the substrate thickness was observed at Ubias =− 100 V. At this voltage, the signal rise and fall times saturate at their minimum values (πrise =35 – 45 ns, πfall =40 – 45 ns), with no additional reduction at higher biases. The results obtained emphasize the strong potential of the developed photodiode for practical implementation in optoelectronic devices. Its combination of high quantum efficiency, fast response time, and operational stability makes it suitable for laser detection, precision measurement, and telecommunication systems.

Critical Values Determination of Parameters of Fixed Electron Flows System in the Processing of Oxide Coatings on Extended Optical Elements

I. V. Yatsenko, V. S. Antonyuk, V. P. Maslov, V. S. Vashchenko, and V. I. Gordienko, “Critical Values Determination of Parameters of Fixed Electron Flows System in the Processing of Oxide Coatings on Extended Optical Elements,” Journal of Nano- and Electronic Physics, vol. 16, no. 1, 2024, doi: 10.21272/jnep.16(1).01005.

A mathematical model has been developed for the external uniformly distributed thermal effect on the surface of a flat bilayer element made of optical glass K108 and oxide coating with Al2O3, MgO, taking into accountthe temperature dependencies of their thermophysical properties (volumetric heat capacity and thermal conductivity). Critical values of external thermal impact parameters (heat flows and durations of their action) leading to the destruction of coatings (crack formation, detachment, delamination, etc.) have been determined. The problem of implementing a uniformly distributed thermal effect along the surface of the oxide coating using a system of fixed ribbon electron flows (REF) has been solved. These REFs are incorporated as a programmatically controlled module into the equipment of modern electron-beam devices. Permissible processing regimes for coating surfaces have been defined (the number of REFs, controlled parameters for each REF such as current, accelerating voltage, and distance to the processed surface). These regimes allow to improve their operational characteristics and prevent potential damage under extreme operating conditions of devices (elevated heating temperatures, thermal shock effects, etc.). Electron-beam processing of extended elements made of optical glass and ceramics, piezoceramic elements, as well as optical elements with coatings of metal oxides, is considered potentially capable of qualitatively processing their surfaces using a system of fixed REF. These REF can serve as the elemental basis in microoptics, integrated and fiber optics, functional electronics, and other fields of precision instrument engineering.

Experimental Studies of the Holes Quality Parameters in Polymer Composite Materials

B. Lupkin, O. Andrieiev, K. Maiorova, V. Antonyuk, and S. Tolstoi, “Experimental Studies of the Holes Quality Parameters in Polymer Composite Materials,” Lecture Notes in Networks and Systems, vol. 1069 LNNS, pp. 589–602, 2024, doi: 10.1007/978-3-031-66268-3_60.

The subjects of study in the article are quality parameters, namely: geometric accuracy, roughness and shrinkage of holes in polymer composite materials (PCM) obtained by drilling. The study of quality indicators was performed with the help of drilling holes kinematic schemes in PCM. The methods used are the analysis of the quality indicators of PCM openings, the method of expert evaluations. The article deals with the analysis of the movement kinematics for the cutting wedge of the drill in relation to the placement of the PCM filler fibers. Experimental research was carried out on carbon fiber samples with 5 mm holes. Drilling was performed with different types of drills: spiral standard drills P6M5K6 and carbide drills with undercut cutting edges BK8. Measurements of accuracy, roughness, fluffiness and shrinkage of holes were carried out on Faro Fusion Arm, Arbus MP-7 devices and a Zeis Tvoxyp-450 scanning electron microscope. The following results were obtained. According to the analysis and synthesis, the existence of cyclic zones of cutting change, which affect the quality parameters for the machined surface of the holes, was established. The fractographic features of PCM fiber destruction after the drilling process are shown. It was found that when PCM is processed with P6M5K5 drills, the roughness of the holes is lower than when processed with BK8 drills. BK8 drills with an undercut cutting edge have an advantage over P6M5K5 drills. It has been proven that BK8 drills allow to increase strength in point joints of PCM parts by up to 20%. The dependence of the shrinkage for the hole in PCM on the cutting modes was experimentally confirmed. The results of the research are intended for a wide range of users who specialize in the mechanical processing of PCM when using innovative structural and multi-functional materials.

Features of Mathematical Modeling Piezoelectrical Components of Devices in Information, Communication and Robotic Systems

C. Bazilo et al., “Features of Mathematical Modeling Piezoelectrical Components of Devices in Information, Communication and Robotic Systems,” Lecture Notes on Data Engineering and Communications Technologies, vol. 221, pp. 324–341, 2024, doi: 10.1007/978-3-031-71801-4_24.

This paper analyzes the results of modeling of piezoelectric elements with different shapes and different sets of material constants. This modeling is capable of determining the electrical impedance of a piezoelectric ceramic sam-ple in the mode of harmonic oscillations. The aim of this study is to research the procedures of mathematical modeling for variously configured piezoelectric components intended for devices used in information, communication, and robotic systems and to delve into the key electromechanical characteristics of these components. The object of the research is the process of mathematical modeling of differently configured piezoelectric elements; the subject of the research is mathematical models of piezoelectric elements.

Mathematical modeling of piezoceramic spherical shell actuator for vibration generating devices

C. Bazilo, V. Antonyuk, M. Bondarenko, S. Vysloukh, O. Voloshko, and R. Litvin, “Mathematical modeling of piezoceramic spherical shell actuator for vibration generating devices,” Vibroengineering Procedia, vol. 55, pp. 233–240, 2024, doi: 10.21595/vp.2024.24470.

The article examines the relevance of piezoceramic spherical shell actuators, which provide a high level of accuracy and stability in the generation of vibrational oscillations over a wide range of amplitude-frequency characteristics. The spherical shape of these actuators is chosen because it allows for uniform distribution of mechanical stresses across the actuator’s surface, thereby enhancing its durability and efficiency compared to traditional flat or cylindrical designs. The study presents analytically derived mathematical models and formulas for determining the electrical impedance of piezoelectric elements and analyzes the dependence of the amplitude of electrical impedance on frequency and the charge ratio on the polarized surfaces of the spherical piezoceramic element. The proposed model enables the determination of electrical impedance as a function of cyclic frequency and various parameters (geometric, physical and mechanical, electrical) of the actuators. The study establishes that spherical shell actuators exhibit a higher quality factor (2-2.5 times greater than disk actuators and 1.4-1.8 times greater than cylindrical actuators) and a significant reduction in impedance (2.5-7 times lower) at electromechanical resonance frequencies around 2.4 kHz. Furthermore, spherical actuators demonstrate 20-30 % better resistance to deformation and 15-25 % lower susceptibility to local resonances compared to other actuator shapes, which enhances operational stability and vibration generation accuracy.

Cyclic Durability Modeling of Parts During Finish-Turning

V. Antonyuk, K. Barandych, M. Gladskyi, S. Vysloukh, and O. Voloshko, “Cyclic Durability Modeling of Parts During Finish-Turning,” CEUR Workshop Proceedings, vol. 3628, pp. 293–299, 2023.

In this paper, it is studied the relationship between cyclic durability of parts and their finish-turning modes. An analysis of the influence of various factors on the fatigue resistance of parts was carried out. It is shown that it is advisable to use turning as the final stage for surface machining, which allows to obtain high-quality parts with smooth surface finish, and therefore, with good operational properties. It is provided experimental results of fatigue tests for the specimens made of 40Х steel (DSTU 7806:2015). The specimens were machined by turning with a cutting speed range 80 and 180 m/min; a federate range of 0.08 and 0.12 mm/rev and a cutting depth of 0.3 mm. Based on the experimental result, a mathematical model of the cyclic durability of parts made of 40X steel was obtained by the method of multifactorial regression analysis considering turning modes and stress amplitude.

Determination of Critical Values for Parameters of Electron Beam Microprocessing of Optical Plates with Double Curvature

I. V. Yatsenko et al., “Determination of Critical Values for Parameters of Electron Beam Microprocessing of Optical Plates with Double Curvature,” Journal of Nano- and Electronic Physics, vol. 15, no. 5, 2023, doi: 10.21272/JNEP.15(5).05030.

The widespread use of electron beam technology in optoelectronic instrumentation is constrained by the limited data on the critical values of the parameters of the electron beam (density of thermal effect of the beam, the time of this effect, etc.) on the optical elements of devices of various geometric shapes (flat, rectangular and curvilinear elements, etc.), the excess of which leads to the destruction of their surface layers (the appearance of cracks, chips, cavities, violation of surface flatness, etc.). Currently, the ranges of change for these parameters for flat plates, rectangular bars, cylindrical and spherical elements have been determined. However, the studies mentioned are absent for optical elements in the form of plates of double curvature, widely used in integral and fiber optics, microoptics and other areas of optoelectronic instrumentation. The work is devoted to the development of mathematical models of the thermal effect of an electron beam on optical elements in the form of plates of double curvature, that allow with a relative error of 5… 7 % to determine the critical ranges of changes in its parameters (density of thermal effect, time of its action), the excess of which leads to a deterioration in the physical and mechanical properties of the surface layers in the elements up to their destruction. This allows to prevent possible deterioration of technical and operational characteristics at the stage of manufacturing devices with the usage of electron beam technology.

FORMATION OF THE QUALITY OF HOLES OBTAINED BY DRILLING IN AVIATION STRUCTURES MADE FROM POLYMER COMPOSITE MATERIALS

B. Lupkin, O. Andrieiev, K. Maiorova, V. Antonyuk, and S. Vysloukh, “FORMATION OF THE QUALITY OF HOLES OBTAINED BY DRILLING IN AVIATION STRUCTURES MADE FROM POLYMER COMPOSITE MATERIALS,” Eastern-European Journal of Enterprise Technologies, vol. 3, no. 1(123), pp. 59–67, 2023, doi: 10.15587/1729-4061.2023.279618.

The subject of this study is the quality indicators (geometric accuracy, roughness, cylindricity and taperness) of holes obtained by drilling in aircraft structures (AS) made of polymeric composite materials (PCM). The quality indicators of holes in AS made from PCM were studied by using kinematic schemes across and along the direction of drilling. A kinematic scheme of formation of the predicted surface roughness of the hole in AS made from PCM has been built. The calculation of the predicted roughness of PCM holes taking into account the geometry of the drill and drilling modes has been proposed. Experimental studies have been implemented to establish the parameters of predicted roughness, geometric accuracy, taperness, as well as deviations from cylindricity. The methods used were the method of expert assessments and experimental studies of quality indicators of PCM openings. The following results were obtained: the roughness in full-scale experiments turned out to be lower than the theoretical calculated values with a difference of not more than 10…15 %. It was found that roughness, taperness, deviations from geometric precision and cylindricity differ in characteristic rotation zones of the drill from 0° to 360° and depend on the drilling parameters and PCM properties. It was found that the deviation from the hole cylindricity is affected by the shrinkage of the material. The appearance of ovality in the holes of prototypes was established. The results of experimental studies of measurements of hole diameters to establish deviations from cylindricity, geometric accuracy, and taperness met the production requirements for the accuracy of their manufacture. For geometric precision and deviation from cylindricity, the results ranged from 7 to 12 IT grades, and for taperness, from 0.083 to 0.28 % per a hole in AS made from PCM and 9–10 IT grades

Heat Exchange in a Contact Zone of Nanoinstrumentation with Elements of the Microsystem Technology

V. S. Antonyuk, I. I. Bondarenko, S. P. Vislouh, O. V. Voloshko, and M. O. Bondarenko, “Heat Exchange in a Contact Zone of Nanoinstrumentation with Elements of the Microsystem Technology,” Journal of Engineering Sciences (Ukraine), vol. 10, no. 1, pp. F1–F6, 2023, doi: 10.21272/jes.2023.10(1).f1.

Theoretical studies of physical processes and phenomena in the zone of physical interaction of nanoinstruments with the surfaces of elements of microsystem technology are carried out in work. Based on the conducted research, mathematical models of energy heat exchange in the zone of physical contact of nanometric dimensions were compiled, and their analytical solution was obtained using the Fourier method of separation of variables and Goodman’s integral method. Simultaneously, the energy components of the processes in the nanocontact zone were considered. The numerical solution of the mathematical model of energy heat exchange in the zone of physical nanocontact was carried out using a software application based on the finite element method. The results were checked according to the equivalent thermal scheme to confirm the adequacy and accuracy of the obtained models. As a result, the mechanisms of energetic interaction of the nanoinstrument with the surfaces of the elements of microsystem technology devices were clarified. It is shown that the use of the proposed method of equivalent thermal circuits for the evaluation of mathematical models of the energy interaction of nanoinstruments with the surfaces of microsystem technology device elements, as well as the further study of the distribution of thermal fields in the nanocontact zone, differs from other numerical and analytical methods in terms of sufficient accuracy and speed of calculations. At the same time, it was established that the discrepancy between the results of mathematical modeling and the results obtained according to the equivalent thermal scheme does not exceed 5-8 %.

Wear Intensity of the Functional Components Made of Diamond-Containing Composite Materials during the Operation of Tools in the Process of Rock Destruction

A. L. Maystrenko et al., “Wear Intensity of the Functional Components Made of Diamond-Containing Composite Materials during the Operation of Tools in the Process of Rock Destruction,” Journal of Superhard Materials, vol. 45, no. 3, pp. 208–216, 2023, doi: 10.3103/S1063457623030164.

Abstract: The wear of functional components of rock-crushing tools with composite diamond-containing materials (DCM) based on a metal binder sintered by resistive electrosintering under pressure in the process of grinding of sandstone from the Torez deposit is studied. A characteristic named the degree of reinforcing of the working surface of the DCM functional components is proposed, which is determined from the ratio of the total area of the diamond cutting grains to the area of the working surface of the functional component. The dependence of the intensity of wear of DCM functional components on the degree of diamond reinforcement of their working surfaces is plotted. During the tests, rock destruction products and wear (sludge) fragments of DCM functional components are collected and analyzed using digital image processing tools, as a result of which morphometric characteristics of the sludge as a function of the degree of reinforcement of the DCM component working surfaces with diamond grains are obtained. Using the colorimetry method, metal binder fragments of the DCM are isolated from the total mass of sludge and their size distribution is determined. The results of morphometric analyses of the wear products of the diamond-containing composite tool and the rock destruction products are given.

Determination of Optimal Modes of Electron-Beam Micro-Treatment of Surfaces in Optic Elements

I. V. Yatsenko, V. S. Antonyuk, V. А. Vashchenko, V. I. Gordienko, S. О. Kolinko, and Т. І. Butenko, “Determination of Optimal Modes of Electron-Beam Micro-Treatment of Surfaces in Optic Elements,” Journal of Nano- and Electronic Physics, vol. 14, no. 4, 2022, doi: 10.21272/jnep.14(4).04012.

As practice has shown, the most erratic, environmentally friendly, and easily controllable way of optical element treatment is the electron-beam method. However, the widespread use of electron beam technology in optoelectronic instrumentation is hampered by the lack of methods for determining optimal modes of electron beam microprocessing of optical elements, representing a set of controlled parameters of the electron beam (current of the beam Ib = 50…300 mА, accelerating voltage Vу = 4…8 kV, distances to the treated surface l = 6.10–2… 8.10–2 m, beam movement speed V=5.10–2…5.10–3 m/s, heat exposure time t=0.3…1.0 s), excess of which leads to a number of undesirable phenomena, that harm the quality of the surfaces to be treated.There have been developed the mathematical models of the process of heating elements from optical glass and ceramics of various geometric shapes and sizes (thin film elements, thin plates of high size) by a moving belt electron beam, which allow to calculate the influence of its parameters on temperature fields in treated elements. It was established that the increase in the Ib and Vу parameters in the specified ranges leads to an increase in the maximum surface temperature of optical elements by more than 2 times, and the decrease in the parameters l and V by less than 1.5 times. Optimal values of the parameters of the electron beam are determined, the excess of which leads to the appearance of cracks and splits in the surface layers of elements, violation of their geometric shape and deterioration of the metrological characteristics of the devices up to their failure.

Features of Low-Temperature GaAs Formation for Epitaxy Device Structures

S. I. Krukovskyi, V. Arikov, A. O. Voronko, and V. S. Antonyuk, “Features of Low-Temperature GaAs Formation for Epitaxy Device Structures,” Journal of Nano- and Electronic Physics, vol. 14, no. 2, 2022, doi: 10.21272/jnep.14(2).02016.

This article presents the results on the peculiarities of the formation of low-temperature gallium arsenide under the influence of complex doping with rare-earth elements ytterbium and aluminum. The electrophysical properties of the epitaxial layers were investigated by ECV profiling, and the structural characteristics using XRD. It is shown that at certain optimal concentrations of ytterbium ((3.0-3.2)·10–3 at. %) and aluminum (1·10–3 at %) it is possible to obtain structurally perfect GaAs epitaxial layers with a low concentration of carriers, and modulation of the rate of temperature decrease allows to obtain a sharper interface between layers with different doping levels. Such layers can be used in photodiode or microwave structures. It is established that an increase in the concentration of ytterbium in the melt causes deterioration of the structural properties of the layers due to the generation of additional defects, which can be used to create optoelectronic devices in the terahertz range

Electronic Beam Technology in Optoelectronic Instrumentation: High-quality Curved Surfaces and Microprofile Creation in Different Geometric Shapes

I. V. Yatsenko, V. P. Maslov, V. S. Antonyuk, V. A. Vashchenko, O. V. Kirichenko, and K. M. Yatsenko, “Electronic Beam Technology in Optoelectronic Instrumentation: High-quality Curved Surfaces and Microprofile Creation in Different Geometric Shapes,” Journal of Nano- and Electronic Physics, vol. 13, no. 4, pp. 1–5, 2021, doi: 10.21272/jnep.13(4).04034.

The curved surface treatment method of optical elements and functional microprofile creation of different geometric shapes using the system of fixed single electronic beams by optimizing the technological parameters of installation (the number of beams, their currents, accelerating voltages and distances to the processed surfaces) is developed. This method allows to create various microoptic parts for optoelectrical devices. The method is based on the practically implemented schemes of location of single electronic beam system that influence curved surfaces of optical elements. According to the developed method, the implementation task was solved using discretely located fixed sources of gaussian type thermal influence with different amplitudes (maximum values of electronic beam heat density) and focus factors influencing the processed surfaces of optical elements. At the same time, the impact control of such sources is carried out automatically using microprocessor equipment. It is shown that while increasing the number of electron rays (up to 50…70), you can get high accuracy of (relative error up to 10 – 4…10 – 5) compliance with the specified complex distributed thermal influences along the processed both flat and curved optical elements necessary for the creation of functional microprofiles on their surfaces of a given geometric shape. At present, due to technical difficulties that are appearing, it is impossible to effectively manage a large number of beams (more than 10…15) However, reducing their number (for example, up to 5…7), it is possible to implement these distributed heat influences with an acceptable accuracy in practice (relative error does not exceed 3…5 %).

Improving the Accuracy of Microhardness Measurement of Nanoelectronic Elements by the Silicic Probes of Atomic-Force Microscopy, that is Modified by Carbon Coverage

M. Bondarenko, V. Antonyuk, I. Bondarenko, I. Makarenko, and S. Vysloukh, “Improving the Accuracy of Microhardness Measurement of Nanoelectronic Elements by the Silicic Probes of Atomic-Force Microscopy, that is Modified by Carbon Coverage,” Lecture Notes in Networks and Systems, vol. 233, pp. 32–37, 2021, doi: 10.1007/978-3-030-75275-0_3.

Possibility of measuring of microhardness of different surfaces of elements of nanoelec-tronics by means of method of atomic-force microscopy is considered in the article. Possibility of application of silicic probes that is modified by carbon coverage is first shown, that allows to conduct complex researches of surfaces and ultrathin coverages. Dependence of measuring exactness is shown on the microhardness of the investigated material. The range of measuring of microhardness of elements of nanoelectronics is set by such probes. Measuring exactness is megascopic to 20–28%, which is a range from 100 MPa to 39 GPa. It extends the nomenclature of materials at determination of its microhardness by atomic-force microscopy.

Matrix of Photosensitive Elements for Determining the Coordinates of the Source of Optical Radiation

V. G. Verbitskiy, V. S. Antonyuk, A. O. Voronko, L. M. Korolevych, D. V. Verbitskiy, and D. O. Novikov, “Matrix of Photosensitive Elements for Determining the Coordinates of the Source of Optical Radiation,” Journal of Nano- and Electronic Physics, vol. 13, no. 4, pp. 1–6, 2021, doi: 10.21272/jnep.13(4).04029.

This paper presents new position-sensitive matrices of photosensitive elements. The photosensitive elements of the proposed matrix can be manufactured, depending on the required spectral range, based on Si, A3B5 solid solutions, etc. Depending on the required technical characteristics, PN photodiodes, PIN photodiodes, or avalanche photodetectors can be used as photosensitive elements. The main advantage of the proposed optical coordinator is a special topology of connection of sensitive elements. The interlaced connection of rows and columns allows to significantly reduce the number of information outputs, expand the dynamic range, and achieve greater manufacturability of the device without significant loss of the signal component. The periodicity of the topology makes it possible to find the position of a light spot, determine its center, and accurately track the movement of the spot along the coordinator without the use of micromechanical centering devices. The “checkerboard” topology of the sensitive elements and method of generating output signals are discussed. Such an arrangement makes it possible to simultaneously determine two coordinates at the same time. Methods for determining the center of a light spot are presented as well. The overlap of the area of the sensitive element by the light spot is proportional to the output current signal. Therefore, it is possible to determine the center of the light spot by solving a two-dimensional geometric problem. The distribution of errors in determining the center was calculated using the method of finding the barycenter in dynamic and statistical modes for different light spot configurations. Directionfinding characteristics were analyzed. A topology of connection that allows to expand the dynamic range of the measurement was submitted.

Multicriteria Optimization of the Part’s Finishing Turning Process Working in the Conditions of Alternating Loadings

V. Antonyuk, K. Barandych, and S. Vysloukh, “Multicriteria Optimization of the Part’s Finishing Turning Process Working in the Conditions of Alternating Loadings,” Lecture Notes in Mechanical Engineering, pp. 491–501, 2021, doi: 10.1007/978-3-030-68014-5_48.

The paper evaluates issues of technological parameters optimization of the machining process of parts operating under alternating loads. It is noted that high cyclic loads on the part during operation often lead to their failure. It is suggested that the finishing of such parts should be carried out by a turning tool, the cutting part of which is made of superhard materials. The main task of this work is formulated, which is the determination of the optimal modes of turning for the part made of the corresponding structural material, which provides the specified quality parameters. To solve this problem, we created a mathematical model of the turning process, which is multicriteria, in which the criteria of optimality selected as maximum values of cyclic durability and productivity of the process. The area of feasible solutions to the optimization problem is provided by the necessary values of the quality parameters of the workpiece and the technical capabilities of the equipment used. Practical testing of the proposed method of optimization of finishing turning with a tool made of cubic boron nitride of 37Cr4(DIN) steel parts, working in difficult operating conditions, showed its great efficiency.

Optimization of the Composition and Process of Preparation of Hot-pressed Ceramics with Increased Characteristics Based on Boron Carbide

V. M. Volkogon et al., “Optimization of the Composition and Process of Preparation of Hot-pressed Ceramics with Increased Characteristics Based on Boron Carbide,” Journal of Nano- and Electronic Physics, vol. 12, no. 6, pp. 06034–1, 2020, doi: 10.21272/jnep.12(6).06034.

The optimal composition and conditions for obtaining hot-pressed ceramics based on powders of technical boron carbide, which has high physical and mechanical properties and can be effectively used in extreme operating conditions, are determined. The influence of activating impurities in the form of oxides in the composition of the initial charge on the formation of the composite material structure in the process of hot pressing is experimentally established. X-ray diffraction analysis of heterophase ceramics which is formed is carried out and it is shown that in the process of hot pressing of ceramics, borides of the corresponding oxides are formed, refining of ceramics with the emergence of secondary structures takes place, and heterogeneous state of the formed ceramics provides a high level of structural characteristics. It is established that the use of activating impurities in the form of &2O3, TiO2 and SiO2 oxides provides the possibility of using industrial technical powders of boron carbide with high free carbon content in the production of ceramics with fine-grained structure and high mechanical properties (Gzg = 600-800 MPa) in a wide temperature range.

The influence of the phase composition of the B-N-C system composite material on its physical-mechanical and tribological characteristics

V. M. Volkogon, S. K. Avramchuk, A. V. Kravchuk, T. V. Pavlychuk, V. S. Antonyuk, and K. I. Avramchuk, “The influence of the phase composition of the B-N-C system composite material on its physical-mechanical and tribological characteristics,” Journal of Nano- and Electronic Physics, vol. 12, no. 3, 2020, doi: 10.21272/jnep.12(3).03035.

The results of investigations of physical-mechanical and tribotechnical characteristics of composite materials based on wurtzite boron nitride of different phase composition, which contain a diamond component in the form of elements of the microstructure of the composite and solid solution of diamond in boron nitride, are presented. It is defined that the maximum hardness of the composites is formed in the temperature range T = 160-700 °S, and further increase of the sintering temperature is accompanied by a decrease in the hardness caused by the material recrystallization and the weakening of the intergranular boundaries. Composites obtained at a temperature T = 1700 oC have the maximum index of the physical and mechanical characteristics. The influence of the phase composition of the composite material on its tribotechnical properties at dry friction on a steel counter in the conditions of a steady change in the speed of sliding in the range V = 6-14 m/s at a load of 20 N is determined. The obtained results can be used to develop practical recommendations for the effective use of composites of WNB-diamond systems in metalworking processes, as well as in heavy-duty friction pairs under conditions of limited lubrication.

InTeraction During Barothermal Processing Of Wurtzite Boron Nitride With Diamonds Obtained Under Different Synthesis Conditions

V. M. Volkogon et al., “InTeraction During Barothermal Processing Of Wurtzite Boron Nitride With Diamonds Obtained Under Different Synthesis Conditions,” Journal of Nano- and Electronic Physics, vol. 11, no. 6, 2019, doi: 10.21272/jnep.11(6).06014.

We present the results of a study of the interaction at a pressure p = 77 GPa and a temperature T = 1600 °C and 1800 °C of wurtzite boron nitride, previously subjected to deformation processing by 4-fold rolling and having a particle size in the developed plane of 0.1…1.5 microns, and diamond powders of various origin obtained under conditions of static synthesis in the presence of a metal solvent and shockwave synthesis from carbon material. The diamond component had the following sizes: submicron powders of static synthesis of 0.1/0 microns, dynamic synthesis diamonds 5…12 nm. The initial charge before barothermal treatment consisted of 90 wt. % BNw and 10 wt. % diamonds. The duration of exposure to temperature under pressure was τ 60 s and τ 120 s. X-ray photography of the samples was carried out on a DRON-3 diffractometer in copper Cu-Kα radiation with a graphite monochromator and digital recording of reflections in the automatic mode with a step movement of 0.1° and exposure duration at each point of 4°. It was found that in the contact interaction of BNw with diamonds, diamond dissolves in boron nitride with the formation of a BNC solid solution, which depends on p, T of the process parameters and the method for producing diamonds. At a temperature T = 1600 °S, there is no interaction of BNw with the diamond component. An increase in temperature to T = 1800 °C leads to the dissolution of diamonds in boron nitride, and their number depends on the time of exposure to temperature, and the interaction of dynamic synthesis diamonds occurs to a greater extent. Homogenization of the BNC solution is observed. To determine the mutual solubility of substances, Vegard's law was applied, and the quantitative content of dissolved diamond in sphalerite boron nitride was established, which is 2 times greater for dynamic synthesis diamonds than for static synthesis diamonds. The higher activity of dynamic synthesis diamonds is due to the feature of their crystalline structure-high dispersion and distortion. The dissolution of diamonds in BNw has a diffusion character.

Regularities of influence of electron-beam technology modes on the performance characteristics of optical elements

I. V. Yatsenko, V. S. Antonyuk, V. A. Vashchenko, O. V. Kyrychenko, and O. M. Tishchenko, “Regularities of influence of electron-beam technology modes on the performance characteristics of optical elements,” Journal of Nano- and Electronic Physics, vol. 11, no. 2, 2019, doi: 10.21272/jnep.11(2).02014.

Experimental researches and new regularities of influence of electron-beam processing modes on quantitative indexes of quality of surface layers of optical glass and ceramics elements are carried out: purity and smoothness of surface – the surface of optical glass elements is completely free of defects, at the same time, there is an increase of purity class, the reduction of microroughness to 0.4-1.3 nm; thickness of melted layer; structural change and chemical composition; squeezing tension and thickness of strengthened layers – in the optical ceramics elements there appear compression tensions up to 30-70 MPa in strengthened surface layers of 90-210 microns thick. Optimal modes of electron-beam technology are found (thermal impact density 7.10 6 -8.10 8 W/m 2 of electron beam, travel speed 5.10 -3 -5.10 -2 m/s), which improve the performance characteristics of optical elements: increase of microhardness of the surface and increase of the strength of surface layers, as well as spectral transmission coefficient; increase of elements stability to external thermal and mechanical influences by their exploitation. Herein, there is a temperature increase of surface layers of elements and a rise in their thermal physical properties: volumetric heat capacity, thermal conductivity coefficient, thermal coefficient of linear expansion. The obtained experimental research results and developed on their basis methods of improvement of performance characteristics of optical elements found their practical use and introduction in a wide range of Ukrainian enterprises, which allowed to increase the accuracy and broaden measurement ranges of impulsive range finders for 7-15 %; to increase the probability of flawless performance of optical fairings of infrared guidance and observation devices and fiber-optic beam guides of laser medical devices while performing at 10-20 %.

Research of microhardness of thin ceramic coatings formed by combined electron-beam method on dielectric materials

V. S. Antonyuk, Y. Y. Bondarenko, S. O. Bilokin’, V. O. Andrienko, and M. O. Bondarenko, “Research of microhardness of thin ceramic coatings formed by combined electron-beam method on dielectric materials,” Journal of Nano- and Electronic Physics, vol. 11, no. 6, 2019, doi: 10.21272/jnep.11(6).06024.

The peculiarities of obtaining thin ceramic coatings (TiO2 + Al2O3, Al2O3, ZrO2) on the surfaces of dielectrics (on the example of Kr1 silicon) during their formation by thermal evaporation in vacuum have been established. The mechanism of increase of microhardness of such coatings by their surface modification by a ribbon-shaped electron steam is investigated. It is shown that the combined thermal vacuum deposition of thin ceramic coatings from powder materials on the surface of Kr1 silicon, followed by their modification by low energy electron flow in one technological cycle, allows to significantly reduce the micro relief and to stabilize the homogeneity of the coating surfaces, as well as to increase the chemical and biological resistance of these coatings to the influence of the environment. The conditions of qualitative determination of microhardness of the studied material with the use of atomic force microscopy are determined. Microhardness studies, both of modified coatings and of dielectric surfaces on which they were applied, were carried out. The fact of nonlinear increase of microhardness (by 13-17 %) of thin coatings deposited on the surface of dielectric material by the combined electron beam method as the thickness of these coatings is established. The possibility of determining the microhardness of multilayer multifunctional ceramic coatings obtained by combined electron beam technology under different conditions and different modes of technological experiment is shown.

Comparison of piezoelectric and DC motor control principles

S. F. Petrenko, A. V. Omelyan, V. S. Antonyuk, and O. G. Novakovskyi, “Comparison of piezoelectric and DC motor control principles,” Journal of Nano- and Electronic Physics, vol. 10, no. 5, 2018, doi: 10.21272/jnep.10(5).05032.

В статті проведено порівняння керуванням п'єзоелектричним двигуном та двигуном постійного струму при використанні найбільш доступних та розповсюджених контролерів. Запропонована схема з'єднання драйвера п'єзоелектричного двигуна та контролера Arduino Nano, а також виконано тесту- вання програми для керування п'єзоелектричним двигуном. Виконано дослідження швидкості п'єзоелектричним двигуном в залежності від коефіцієнту заповнення сигналу широтно-імпульсною модуляцією при різних частотах. Показано, що залежність швидкості двигуна від коефіцієнту запо в- нення сигналу широтно-імпульсною модуляцією має характер близький до лінійного, як і в двигуні постійного струму і може здійснюватися аналогічно керуванню двигуном постійного струму з викорис- танням стандартних програм.; The article compares the control methods of a piezoelectric motor and a DC motor using the most widely available and widely used controllers. A circuit for connecting the piezoelectric motor driver and Arduino Nano controller is proposed, as well as testing the program for controlling the piezoelectric motor. The study of the velocity of a piezoelectric motor is performed, depending on the coefficient of filling the signal by pulse-width modulation at different frequencies. It is shown that the dependence of the engine's speed on the coefficient of filling the signal by pulse-width modulation has a character close to the linear one, as in the DC motor, and its control can be carried out in the same way as driving a DC motor using standard programs.

Ensuring Fatigue Life of Parts During Finish Turning with Cubic Boron Nitride Tools

K. S. Barandych, S. P. Vysloukh, and V. S. Antonyuk, “Ensuring Fatigue Life of Parts During Finish Turning with Cubic Boron Nitride Tools,” Journal of Superhard Materials, vol. 40, no. 3, pp. 206–215, 2018, doi: 10.3103/S1063457618030085.

The paper addresses a relationship between the surface state of a steel 40Kh part upon finish turning with cBN tools and its fatigue life. The authors are the first to put forward a mathematical model that shows the dependence of fatigue life of a machined part on the machining conditions in turning using cBN tools. This study has demonstrated the possibility of finish turning of essential parts that have to work under loading of variable magnitudes and directions.

The Increase in the Probability of Failure-Free Operation of the IR-Devices Homing and Tracking by the of Electron Beam Processing of Optical Fairings on the Areas

I. V. Yatsenko, V. S. Antonyuk, V. I. Gordienko, O. V. Kiritchenko, and V. A. Vaschenko, “The Increase in the Probability of Failure-Free Operation of the IR-Devices Homing and Tracking by the of Electron Beam Processing of Optical Fairings on the Areas,” Journal of Nano- and Electronic Physics, vol. 10, no. 4, 2018, doi: 10.21272/jnep.10(4).04028.

The results of theoretical researches of process of the thermal effects of supersonic gas flow on the hemispherical fairings of optical ceramics IR-devices homing and tracking, determining the location on the surface plots the maximum external thermo-influences, where the destruction of the fairings, which leads to failure of the device. The results of experimental researches of properties of surface layers of these areas by the finish of electron beam processing, which leads to increased durability of the fairings to the external thermal and mechanical stresses and decrease in the amount of damage and improve efficiency of the devices during their operation.

Determining the critical parameters of the electron beam with surface melting of the optical elements of precision instrumentation

I. V. Yatsenko, V. S. Antonyuk, V. I. Gordienko, V. A. Vaschenko, and O. V. Kiritchenko, “Determining the critical parameters of the electron beam with surface melting of the optical elements of precision instrumentation,” Journal of Nano- and Electronic Physics, vol. 9, no. 1, 2017, doi: 10.21272/jnep.9(1).01010.

Mathematical model of deep melting elements made of optical glasses under the influence of the electron beam. The calculations of the thickness of the melted layer and the velocities of the interface depending on the parameters of electron beam (density and time of thermal influence). It is established that when the thermal change in the density of influence of the beam in the range of 7·106…8,5·108 W/m2 and increasing duration of exposure up to 14 s with the thickness of the melted layer can reach 300…500 μm. We calculated critical parameters of the electron beam, the exceeding of which leads to disruption of the flatness of the optical elements, changing their geometrical shape and deterioration of technical and operational characteristics of the devices until they exit their building.

Prevent potential destruction of the optical elements of precision instrumentation to external thermo-influences

I. V. Yatsenko, S. V. Antonyuk, V. A. Vaschenko, and V. V. Tsybulin, “Prevent potential destruction of the optical elements of precision instrumentation to external thermo-influences,” Journal of Nano- and Electronic Physics, vol. 8, no. 1, 2016, doi: 10.21272/jnep.8(1).01027.

Presents the results of experimental investigations on improvement of properties over the surface layer of elements made of optical glass by a preliminary electron beam processing of their working surfaces. This allows to increase the resistance elements to the external thermo-influences and reduce the possible of destruction, as well as improve the texture, clarity and smoothness of their surfaces, which leads to increased reliability and lifetime of devices based on them, the empowerment of their application (range and intensity of impact on the object, etc.).

Formation of wear-resistant coatings on silicon probes for atomic force microscopy by thermal vacuum evaporation

V. S. Antonyuk, S. O. Bilokin’, M. O. Bondarenko, Y. Y. Bondarenko, and Y. I. Kovalenko, “Formation of wear-resistant coatings on silicon probes for atomic force microscopy by thermal vacuum evaporation,” Journal of Superhard Materials, vol. 37, no. 2, pp. 112–119, 2015, doi: 10.3103/S1063457615020057.

The possibility has been shown to modify silicon probes for atomic force microscopes by thin wear-resistant carbide coatings, which leads to the improvements of their operating properties (decreases the probability of appearing artifacts of scanning by 20–22% and increases the probes service life by 45–55%). Optimal conditions for the deposition of such coatings by thermal evaporation in a vacuum with a subsequent low-energy electron-beam microprocessing have been proposed. The quality of deposited coatings has been checked and the tests showed a decrease of the probe surface subroughness by a factor of 15–25 and increase of the microhardness and wear resistance of coatings by a factor of 1.1–1.35.

Mechanism of origin and neutralization of residual triboelectricity at scanning of dielectric surfaces by a silicon probe of the atomic-force microscope

M. A. Bondarenko, S. A. Bilokon, V. S. Antonyuk, and I. I. Bondarenko, “Mechanism of origin and neutralization of residual triboelectricity at scanning of dielectric surfaces by a silicon probe of the atomic-force microscope,” Journal of Nano- and Electronic Physics, vol. 6, no. 2, 2014.

The reasons and mechanism of the destructive effect of the electrostatic interaction forces of silicon probe and dielectric surfaces are established in the paper at the investigation of the surface microgeometry and mechanical characteristics by the atomic-force microscopy method. Calculation of the electrostatic interaction forces of two silicon surfaces is carried out and the destructive effect of electrostatic discharge appearing as a result of triboelectric effect is determined. The module of removal of electrostatic charge is proposed. Its principle of operation consists in the formation of the conduction band in the place of contact of two dielectrics by the multiphoton ionization. It is shown that application of such method of neutralization of residual triboelectricity improves accuracy, reliability, and reproducibility of the scanning results.

Studies of thin wear-resistant carbon coatings and structures formed by thermal evaporation in a vacuum on piezoceramic materials

V. S. Antonyuk, M. O. Bondarenko, and Yu. Yu. Bondarenko, “Studies of thin wear-resistant carbon coatings and structures formed by thermal evaporation in a vacuum on piezoceramic materials,” Journal of Superhard Materials, vol. 34, no. 4, pp. 248–255, 2012, doi: 10.3103/S1063457612040065.

Functional features of producing thin wear-resistant coatings have been studied by analyzing the conditions of their formation via thermal vacuum deposition on the surfaces of piezoceramic materials. The effect has been revealed of a low-energy ribbon flow on physical and operating characteristics of surfaces of piezoceramic elements, which operate in aggressive media. It has been found that the modification of surfaces of piezoelectric cells from the TsTC-19 ceramics by a low-energy ribbon flow (E ≤ 6 keV) improves the microgeometry of these surfaces, promotes the formation of carbon structures on them, which increases the surface microhardness by 8-12%.

Providing adhesion strength for a substrate–coating system under contact loading

V. S. Antonyuk, E. B. Soroka, and V. I. Kalinichenko, “Providing adhesion strength for a substrate–coating system under contact loading,” Journal of Superhard Materials, vol. 30, no. 2, pp. 133–138, 2008, doi: 10.3103/S1063457608020093.

—The authors of the article discuss some feasible means of determining geometrical parameters of a discrete-type coating with a view to ensure adhesion strength of the substrate–coating composite. The stress–strain calculations are performed for an element of a carbide tool with a vacuum-plasma-deposited coating, under contact loading, allowing for friction forces.

Discontinuous coatings on cutting tools

V. S. Antonyuk, E. B. Soroka, B. A. Lyashenko, and A. V. Rutkovskii, “Discontinuous coatings on cutting tools,” Strength of Materials, vol. 39, no. 1, pp. 99–102, 2007, doi: 10.1007/s11223-007-0014-4.

To increase the life of cutting tools, it is proposed to form wear-resistant discontinuous coatings on their surface. In order to ensure cohesive strength of coating, coating crack spacing is taken as the size of discrete portion. It has been shown that under contact loading conditions, such coatings prevent contact fracture thanks to reduction of residual stresses.

On reduction of residual stresses in vacuum-plasma coatings with a discrete structure

V. S. Antonyuk, B. A. Lyashenko, E. B. Soroka, and A. V. Rutkovskij, “On reduction of residual stresses in vacuum-plasma coatings with a discrete structure,” Sverkhtverdye Materialy, no. 2, pp. 72–75, 2005.

A problem of increasing in contact strength of coating through decreasing in residual stresses is considered. The wear-resistant titanium nitride coatings with the discrete structure of some areas are prepared by the method of vacuum plasma spraying. It is shown that the discrete structure in place of continuous coating enables to lower the residual stresses. The approach proposed for limitation of magnitude of the residual stresses in coating with retention of its continuity allows to cut a probability of contact fracture.

The effect of graphite-like boron nitride on residual stresses, strength and performance of wurtzitic boron nitride-based materials

V. M. Volkogon, and V. S. Antonyuk, “The effect of graphite-like boron nitride on residual stresses, strength and performance of wurtzitic boron nitride-based materials,” Sverkhtverdye Materialy, no. 5, pp. 52–55, 2001.

The specific features of physico-mechanical properties formation of polycrystal materials (PM) on the basis of wurtzitic boron nitride (hexagonite-A) are studied. The influence of the graphite-like BNg fraction in hexagonite-A on the level of residual stresses after PM sintering is estimated. The relation of the residual stresses with PM strength and normal operation is investigated.

Formation of wear-resistant antifriction composite coating reinforced with ultradispersed diamonds

V. S. Antonyuk, “Formation of wear-resistant antifriction composite coating reinforced with ultradispersed diamonds,” Sverkhtverdye Materialy, no. 4, pp. 72–76, 1998.

The problems of forming the wear-resistant antifriction coatings on to components of friction pairs are considered. New composite antifriction material on the basis of nonferrous metals, reinforced with ultra-dispersed diamonds of detonation synthesis, is suggested. Such coatings are investigated experimentally and efficiency of their application is shown by the example of friction pair in the internal combustion engine bush.

Прогнозування терміну надійної експлуатації інтегральних мікросхем радіотехнічних пристроїв

Андрієнко В.О., Іванченко В.В., Гончаров А.В., Скорина Є.В., Антонюк В.С.
Вісник НТУУ «КПІ». Приладобудування, 2014, № 48, с. 125–130
УДК: 519.718.2

Запропоновано методику верифікації інтегральних мікросхем на прикладі елементів пам’яті з використанням тестів, що добре корелює з побудованою математичною залежністю безвідмовності роботи від часу експлуатації. Визначено залежність часу надійної експлуатації інтегральних мікросхем від умов експлуатації, стану поверхні кремнієвого чипу та впливів зовнішнього середовища. Наведено перевагу використання методу атомно-силової мікроскопії у прогнозуванні часу експлуатації порівняно з традиційними методами програмного тестування.