The Influence of In-situ SiC whiskers on the Friction and Wear Properties of C/C-SiC Composites Material
SiC whisker(SiCW)was introduced into the fiber bundle of C/C-SiC composites by polymer impregnation pyrolysis(PIP)technology,and then C/SiCW-C-SiC composites were prepared by chemical vapor infiltration(CVI)and liquid silicon infiltration(LSI)methods.The phase composition and typical micro-structure characteristics of in-situ grown SiCW were systematically studied.The friction and wear properties of C/SiCW-C-SiC composites were tested at different braking speeds.The results show that the introduction of SiCW has little effect on the average friction coefficient and instantaneous friction coefficient,and the friction performance does not change significantly.Compared with C/C-SiC,the wear rate of C/SiCW-C-SiC can be reduced by 20%-60%at medium and high speed braking.
SiC whiskersC/C-SiCmicrostructurefriction and wear properties
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