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Документ Design of experiments of PVD coatings tin(Сумський державний університет, 2024) Pinchuk, N. V.Документ Development of technology for forming vacuum-arc TiN coatings using additional impulse action(Institute for Single Crystals, 2022) Pinchuk, N. V.; Starikov, V. V.; Kniazieva, H. O.; Surovytskyi, S. V.; Konotopska, N. V.The effect of supplying a constant and high-voltage pulse with duration of 10 μs on the formation of predominantly oriented crystallites and the stress-strain state of vacuum-arc TiN coatings at two pressures of a nitrogen atmosphere is analyzed. It is shown that the deposition of the coatings under conditions of high voltage cascading effect leads to the growth of crystallites with the texture axis [110]. and to a change in the stress-strain state (reduction of deformation in the group of crystallites with the axis [111]). The obtained results are explained by an increase in the mobility of atoms and ordering processes in the region of the displacement cascades formed under the action of bombarding high-energy ions accelerated in the field of high-wave pulse potential. Computer simulations of the main processes observed during deposition were performed.Документ Influence of Bias Potential Magnitude on Structural Engineering of ZrN-Based Vacuum-Arc Coatings(Vasyl Stefanyk Precarpathian National University, 2021) Sobol, O. V.; Postelnyk, H. O.; Pinchuk, N. V.; Meylekhov, A. A.; Zhadko, M. A.; Andreev, A. A.; Stolbovoy, V. A.The creation of the scientific foundations for the structural engineering of ultrathin nanolayers in multilayer nanocomposites is the basis of modern technologies for the formation of materials with unique functional properties. It is shown that an increase in the negative bias potential (from -70 to -220 V) during the formation of vacuum-arc nanocomposites based on ZrN makes it possible not only to control the preferred orientation of crystallites and substructural characteristics, but also changes the conditions for conjugation of crystal lattices in ultrafine (about 8 nm) nanolayers.Документ Using a Bias Potential in a Constant and Pulse Modes for Structural Engineering Vacuum Arc Nanocrystalline Coatings of Zirconium Nitride(Сумский государственный университет, 2014) Sobol’, O. V.; Andreev, A. A.; Stolbovoy, V. A.; Gorban’, V. F.; Pinchuk, N. V.; Meylekhov, A. A.In order to develop the direction of "structural engineering nitride coatings" in the work conducted systematic analysis of the impact of the negative bias potential (direct and high-voltage pulse) on the structure, substructure and mechanical properties of ZrN coatings obtained by vacuum arc evaporation. Defined boundary value of (– 100 V) DC potential applied to the substrate, below which a high-voltage pulse potential (– 1200 ... – 2000 V quantity that allows to form peaks bias) makes a decisive contribution to the formation of preferred orientation of the crystallites with the [110] axis. The highest values of hardness 43 GPa are achieved at a constant potential -70 V. Supply high-voltage pulse shifts the maximum hardness in the direction of a greater value of the constant potential.Документ The effects of nitrogen atmosphere pressure, constant and high-voltage pulse potentials of the substrate on the structure and properties of vacuum-arc ZrN coatings(Национальный научный центр "Харьковский физико-технический институт", 2015) Sobol’, O. V.; Andreev, A. A.; Stolbovoy, V. A.; Gorban’, V. F.; Pinchuk, N. V.; Meylekhov, A. A.ZrN-phase coatings with a cubic lattice (NaCl structure type) were produced by the method of vacuum-arc evaporation of a Zr cathode in nitrogen atmosphere at pressures PN between 0.02 and 0.64 Pa. The pressure increase at a bias potential of -150 V leads to formation of the growth texture [111] or to appearance of the bitextural state with the axes [111] and [311]. Additional pulsed-mode supply of high-voltage negative potential Uip = 800…2000 V, with pulse duration of 10 μs and frequency of 7 kHz, stimulates the emergence of texture [110]. At the substructure level, the Uip supply causes the microstrain relaxation and the crystallite size growth with increasing pressure. The observed changes are attributed to increased particle mobility and nitride formation activity under the action of Uip. The hardness increases with increasing pressure and reaches a value of 43 GPa. The Uip supply leads to a shift of the maximum hardness towards higher pressures.