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J. Korean Ceram. Soc. > Volume 31(5); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(5): 520.
Free Silicon 함량에 따른 Si-SiC 복합재료의 마찰 마모 특성
김인섭, 이병하
명지대학교 공과대학 무기재료공학과
Effect of the Amount of Free Silicon on the Tribological Properties of Si-SiC
An investigation was carried out to understand the effect of the amount of free silicon on the tribological properties of Si-SiC. The specimens of dense Si-SiC composites with various amount of free silicon were fabricated in the temperature of 175$0^{circ}C$ after molding under various pressure. Wear properties were measured by ball-on-plate wear tester under the constant weight of 4 Kgf at constant sliding speed of 500 mm/sec in water. As the result, the Rockwell hardness and fracture strength of Si-SiC composites remained nearly constant up to 16.62 vol% of free silicon in the Si-SiC microstructure. The Si-SiC composites containing the free silicon of 16.62 vol% was considered to be prominent in the tribological properties, which had the friction coefficient of 0.08 and the specific wear rate of 2.4$times$10-8$textrm{mm}^2$Kgf-1. The analysis of the wear surface indicated the complicated processes occuring on the surface such as fine polishing, abrasion, microfracture.
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