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Electrodeposition of Chromium Composite Coatings with Improve Wear Resistanceстатья
- Авторы: VINOKUROV EVGENY G., KUZNETSOV VITALY V., FILATOVA ELENA A., GRAFUSHIN ROMAN V., ZHELEZNOV EVGENIY V.
- Журнал: Гальванотехника и обработка поверхности
- Том: 30
- Номер: 1
- Год издания: 2022
- Первая страница: 15
- Последняя страница: 23
- DOI: 10.47188/0869-5326_2022_30_1_15
- Аннотация: Composite coatings were obtained by electrodeposition of chromium with Graphite, TiN or wurtzite-like BN (w-BN). The inclusion of dispersed phase particles into coatings was confirmed by the data of SIMS, microscopy, and XPS. The content (vol.%) of the dispersed phase in the electrodeposits was equal to: 10 - for Cr-graphite coatings, 4 -for Cr-TiN deposits, and 1.5 -in the case of Cr-w-BN coatings. Composite Cr- graphite coatings showed no increase in the microhardness as compared to chromium deposits, while their fracture toughness (K1c) and wear characteristics were better due to the lubrication effect of graphite. The inclusion of graphite nanoparticles into a chromium matrix led to a 1.4-fold increase in the value of K1c. The coefficient of friction in the tribopair “coating - steel” decreased from 0.32 (Cr) to 0.19 (Cr-graphite) under conditions of dry friction and from 0.05 (Cr) to 0.03 (Cr-graphite) in the presence of a lubricant. At the same time, the inclusion of TiN particles into a Cr-matrix resulted in an improvement in both microhardness and wear resistance of the coatings. A significant increase in wear resistance (70-170 %) was obtained for Cr-w-BN coatings with a small content of the dispersed phase. The results of the experiments showed that electrodeposition is a promising technique for obtaining chromium-based composites with improved physicomechanical characteristics.
- Добавил в систему: Кузнецов Виталий Владимирович