Wear behaviour of C/C-SiC composites sliding against high-Cr steel discs

Abstract

An experimental investigation was conducted to examine the wear behaviour of cross-ply carbon-carbon-silicon carbide composites (C/C - SiC) under dry sliding against a chromium steel disc at various speeds and loads. Results indicated that under identical conditions, C/C-SiC composites with weak fibre resin interfaces at all times had a larger weight loss than those with a strong bond. In the first few minutes of wear, weight losses were approximately the same for both types of composites. Also, the wear rates of both the composites decreased sharply with sliding distance up to 7 km, and then gradually tended to become constant. Scanning electron microscopy showed that the graphite film was transferred on the test pin side, which stabilizes the increase in test pin temperature after the formation of a thick film of graphite debris.