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J. Korean Ceram. Soc. > Volume 36(5); 1999 > Article
Journal of the Korean Ceramic Society 1999;36(5): 531.
핏치계 탄소-탄소 복합체의 제조 미세구조 및 마찰-마모 특성
이진용, 서동수, 임연수1, 조동환2
충남대학교 재료공학과
1명지대학교 세라믹·화학공학부
2금공공과대학교 고분자공학과
Fabrication Microstructure and Friction-Wear Properties of Pitch-Based C-C composites
ABSTRACT
This study presents microstructure and friction-wear properties of pitch-based C-C composites prepared by a vacuum impregnation-atmospheric carbonization (VICA) and a hot isostatic pressure impregnation-carbonization (HIPIC) process. For the VIAC process the density was 1.79g/cm3 after 5 times of densification cycle. On the other hand 1.83g/m3 only after 3 times of densification cycle by the HIPIC. The VIAC C-C composites. showed high friction coefficient and wear rate due to a low hardness as a result high crystallinity of the composites. In the VIAC C-C composites the friction coefficient and the rate decreased with increasing sliding velocity and normal load for all friction condictions except the condition of 123.3N-5.86 msec-1 where the wear rate increased rapidly by an oxdation wear that was resulted from a high friction temperature at this condition
Key words: Coal-tar pitch, VIAC, HIPIC, C-C composites, Friction coefficient, Wear rate
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