Перегляд за Автор "Kharchenko, S.D."

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  • Ескіз
    Документ
    Nanostructural glasscomposite self-lubricant coatings
    (Хмельницький національний університет, 2022) Fialko, N.M.; Shchepetov, V.V.; Kharchenko, S.D.; Kovtun, S.I.; Hladkyi, Ya.N.; Bys, S.S.; Фіалко, Н.М.; Щепетов, В.В; Харченко, С.Д.; Ковтун, І.І.; Г ладкий, Я.М.; Бись, С.С.
    The results of the study of glass-composite nanostructured self-lubricating coatings are presented. The structural components of these coatings significantly affect the graphitization process and provide an antifriction surface layer of α-graphite. The formation of this layer makes it possible to significantly minimize the contact parameters in the friction region. A significant effect of aluminoborosilicate in the form of a glass phase on the tribological properties of coatings is noted. An increase in adhesive strength is achieved by forming a surface layer of glassy sodium silicate. The presence of near-surface particles in the graphite layer does not affect the tribotechnical characteristics of the coatings. The developed glass-composite nanostructured self- lubricating coatings have high antifriction characteristics throughout the entire load- speed range.
  • Ескіз
    Документ
    Tribotechnical coatings
    (Хмельницький національний університет, 2024) Zemlyanoy, A.O.; Bys, S.S.; Shchepetov, V.V.; Kharchenko, S.D.; Kharhenko, O.V.
    Wear and tear limits the possibilities and shortens the operational life of modern technical systems. Therefore, the importance and necessity of consideration of issues aimed at reducing frictional forces and increasing wear resistance cannot be doubted. The paper summarizes the theoretical and applied results of triboresistance studies of detonation coatings of the Nb-Zr-V-Si-C-MgC2 system under conditions of constant loading in the field of sliding velocities. It has been established that the ratio of the quality of the components that make up the surface modified structures changes. It is noted that at the initial test speeds the presence of lower metal carbides that are part of the coating dominates, with an increase in speed under the current load due to solidphase and diffusion processes, higher ones are formed in the graphite matrix carbides with enhanced thermodynamic properties