Abstract
Ceramic coatings with solid lubricant fillers are in demand in friction units operated for a long time in the absence of lubricant and maintenance, in particular in space engineering. The paper describes a technology for producing composite coatings with an aluminum oxide matrix and fillers made from microdispersed molybdenum disulfide, graphite, and nanodispersed magnetite. The study evaluates triboengineering characteristics of oxide coatings with anti-friction fillers depending on their concentration and determines the optimal operating modes of the coatings. The established optimal concentrations of dispersed particles in the electrolyte are: no more than 20 g/l for magnetite, no more than 40 g/l for graphite, 45 g/l for molybdenum disulfide. The coating modified with molybdenum disulfide has the best tribological properties. The friction coefficient of the main coating without anti-friction fillers is 1.7–3 times higher than coatings with solid lubricant fillers. There is the experimental study of the contact pressure effect on the linear wear rate. The authors propose a criterion for the transition from elastic to plastic contact. It is a base for a calculated ratio to assess the transition from stable operation of atribocoupling to its catastrophic wear. The paper establishes the pressure range for the obtained anti-friction coatings to be operated under the conditions of elastic contact and fatigue failure. As a result of high-temperature tribotechnical tests, the temperature ranges of the stable performance of the studied composite materials with solid lubricant fillers were established.
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Bolotov, A., Novikova, O., Novikov, V. (2023). Triboengineering Properties of Oxide Coatings with Anti-friction Fillers. In: Radionov, A.A., Gasiyarov, V.R. (eds) Proceedings of the 8th International Conference on Industrial Engineering. ICIE 2022. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-14125-6_53
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