Abstract
Silicon carbide nanofibers grew on the surface of carbon fibers of a unidirectional carbon preform by CCVD and then chemical vapor infiltration was used to densify the preform to obtain SiCNF-C/C composites. The effects of Silicon carbide nanofibers on friction and wear properties of SiCNF-C/C composites were deeply analyzed. Results show that the friction and wear properties of SiCNF-C/C composites are well improved due to the melioration of microstructure after modified by SiCNFs. The friction coefficient of SiCNF-C/C composites is more stable along with friction speed than that of C/C composites, it maintains high even at high friction speed. The wear of SiCNF-C/C composites is much lower and more stable than that of C/C composites with the increase of friction speed, especially in the vertical direction.
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