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J. Korean Ceram. Soc. > Volume 33(5); 1996 > Article
Journal of the Korean Ceramic Society 1996;33(5): 479.
반응소결 SiC-graphite 복합체의 마찰마모특성
백용혁, 신종윤, 곽효섭1, 박용갑2
전남대학교 무기재료공학과
2선문대학교 재료공학과
Tribological Properties of Raction-Bonded SiC-Graphite Composites
The tribological properties of ceramics are very important in the application to engineering ceramic parts such as mechanical seal slurry valve disc and so on. In this study the effect of graphite addition on the mechanical and tribological properties of RBSC/graphite composites were investigated. The composites were prepared by adding graphite powder to the mixture of SiC powder metallic siliconcarbon black and alumina. Bending strength water absorption friction coefficient the amount of worn out material at a certain time and maximum surface roughness(Rmax) of the prepared composites were measured and crystalline phases were examined with XRD. The composite containing 5 vol% graphite powder showed improved bending strength due to high green density and decreased friction coefficient and wear resistance. The friction coefficient and the wear resistance of the composite were increased by adding graphite powder up to 10 vol% They decreased however as increasing the amount of graphite powder more that 10vol% There was no linear relationship between the tribological properties and bending strength of the composites.
Key words: RBSC/graphie composite, Tribological properties, Friction ceofficient, Wear rate, Maximum surface rough-ness$(R_{max})$
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