화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.25, No.1, 133-141, January, 2001
Export Citation
산화억제제 첨가에 의한 탄소/탄소 복합재료의 물성에 관한 연구 : 6. 탄소/탄소 복합재료의 마찰 및 마모특성
Influence of Oxidation Inhibitor on Carbon-Carbon Composites: 6.Studies on Friction and Wear Properties of Carbon-Carbon Composites
박수진†, 서민강, 이재락
  • 한국화학연구소 화학소재연구부
Soo-Jin Park†, Min-Kang Seo, and Jae-Rock Lee
  • Advanced Materials Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusong, Taejon 305-600, Korea
E-mail:
초록
산화억제제로 사용한 이규화 몰리브덴(MoSi2)의 함량에 따른 일방향 탄소/탄소 복합재료의 마찰 및 마모 특성에 관하여 대기상태 하에서 정속마찰시험기를 이용하여 측정하였다. 그 결과, 탄소/탄소 복합재료는 마찰온도 150~180 ℃에서 급격한 마찰계수의 전이, 즉 normal wear 영역에서의 낮은 마찰계수(μ=0.15~0.2)에서 dusting wear 영역에서의 높은 마찰계수(μ=0.5~0.6)로의 전이를 나타내었다. 이렇게 마찰계수가 전이하는 온도범위의 존재는 탄소/탄소 복합재료로 만든 브레이크가 복합재료의 열적 특성에 큰 영향을 받는다는 것을 의미한다. 그리고 산화억제제인 MoSi2를 가지는 탄소/탄소 복합재료는 이를 함유하지 않은 복합재료에 비해 약 1.5배 정도의 낮은 평균마찰계수 및 마모율을 나타내었으며, 특히 4 wt% MoSi2 함량을 가진 복합재료가 가장 큰 마모활성화 에너지 값을 나타내었다.
The friction and wear properties of carbon-carbon composites made with different weight percent of MoSi2 as an oxidation inhibitor were investigated using a constant speed wear test apparatus in an oxidation environment. The results indicated the carbon-carbon composites undergoing an abrupt transition of friction coefficient, from low-friction behavior(μ=0.15~0.2) during normal wear regime to the high-friction behavior(μ=0.5~0.6) during dusting wear regime at the frictional temperature range of 150~180℃. The existence of temperature-dependent friction and wear regimes implied that the performance of specimen made with carbon-carbon composites was markedly affected by the thermal properties of the composites. The carbon-carbon composites filled with MoSi2 exhibited two times lower coefficient of friction and wear rate in comparison with the composites without MoSi2. Especially, the composites containing 4wt% MoSi2 filler showed a significantly improved activation energy for wear due to the reduction of both the porosity and powdery debris film formation on sliding surface when compared to those without MoSi2.
Keywords:carbon-carbon composites;MoSi2;friction and wear;powdery debris film;morphology
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