The Microstructure and Tribological Properties of Carbon Fibre Reinforced Carbon/SiC Dual Matrix Composites

摘要

Carbon fibre reinforced carbon and silicon carbide dual matrix composites (C/C-SiC) are new type of high performance brake materials,and possess a series of outstanding advantages.In the present study,the C/C-SiC brake composites were fabricated by the combination of chemical vapor infiltration with liquid silicon infiltration.The fabric preforms were prepared by three dimension needling method.Results show the SiC form inside the short-cut fabric,around the needing fibre and among the fibre bundles in the non-woven web of the C/C-SiC composites.The average static friction coefficient of the C/C-SiC materials was 0.61.The average dynamic friction coefficient were between 0.41 and 0.54 with the increase of brake speed,and the wear rates are not sensitive to the brake speed and maintained about 0.02 cm3·MJ-1 all along.