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Постійне посилання на розділhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/35393
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Документ Structure and properties of multi-period vacuum-arc coatings based on chromium nitride(Institute for Single Crystals, 2020) Postelnyk, H. O.; Sobol, O. V.; Kucerova, L.; Dur, OsmanThe properties of multi-period nanocomposite coatings based on chromium nitride are considered. The effect of the negative bias potential on the phase-structural state and mechanical characteristics of the coatings was investigated by X-ray diffractometry combined with the study of hardness by nanoindentation, surface roughness and coefficient of friction during scratch testing. It has been established that all the systems are characterized by the formation of a cubic crystal lattice of the structural type NaCl, as well as the effect of texture on hardness values. For the studied coatings, the hardness is in the range of 20-25 GPa. The presence of texture [311] in CrN/MoN nanocomposite coatings leads to the lowest friction coefficient with a value of about 0.2.Документ Structural engineering and functional properties of vacuum-arc coatings of high-entropy (TiZrNbVHf)N and (TiZrNbVHfTa)N alloys nitrides(Institute for Single Crystals, 2019) Sobol, O. V.; Dur, Osman; Postelnyk, A. A.The effect of nitrogen pressure during the deposition of vacuum-arc (TiZrNbVHf)N and (TiZrNbVHfTa)N coatings on their phase-structural state, substructure and resistance to abrasive wear was investigated. It was established that in multi-element (based on high-entropy alloys) (TiZrNbVHf)N and (TiZrNbVHfTa)N coatings obtained in a nitrogen atmosphere in the range of nitrogen pressures PN = 2.5 ·10-4-4.5 ·10-3 Torr, a single-phase state is formed (based on cubic crystal lattice of structural type NaCl). The use of a multi-element composition with a single-phase state with a cubic lattice allows for (Ti-V-Zr-Nb-Hf-Ta)N coatings to achieve high microstrain values (up to 1.2 %) at low deposition pressure. It was found that high-entropy nitride coatings with low abrasive wear are characterized by a crystallite grain size of less than 50 nm, the absence or low level of texture perfection [111], and the presence of a rather high microstrain in crystallites (reaching 1.2 %). The reasons for the observed changes in the structural state and substructure of multi-element nitride coatings and their effect on abrasive resistance are discussed.