| Summary: | In this paper, the research of friction coefficient changes in the tribopairs carbon-fiber-reinforced silicon carbide (C/SiC) – steel 37Cr4 and C/SiC – steel C22 used in cars brake systems was carried out for the selection of suitable materials and conditions of usage that provide a vehicle with high performance and safety of braking. Brakes made of C/SiC are very effective in sport cars, but they are expensive, which makes it impossible to use such materials for design of both pads and discs in the brake systems of trucks and offroad vehicles. The main goal of this work was to choose the most suitable material for manufacturing of brake discs interacting with C/SiC pads in order to decrease the cost of brake systems without decreasing their performance. According to the results of the research, the tribopair C/SiC – steel C22 could be used in heavy loaded trucks and massive off-road vehicles.
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