Proceedings of the Korea Committee for Ocean Resources and Engineering Conference (한국해양공학회:학술대회논문집)

Korean Society of Ocean Engineers (한국해양공학회)
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Sliding Wear Properties of Carbon Fiber Reinforced $Si_3N_4$ Ceramics

탄소섬유강화 질화규소 세라믹스의 마찰마모 특성

  • Park Yi-Hyun (Department of Mechanical Engineering, Graduate School of Dong-Eui University) ;
  • Yoon Han-Ki (Division of Mechanical Engineering, Dong-Eui University) ;
  • Kim Bu-Ahn (Division of Mechanical & Aerospace Engineering, Gyeong-Sang National University) ;
  • Park Won-Jo (Division of Material Engineering, Pu-Kyoung National University)
  • 박이현 (동의대학교 기계공학과 대학원) ;
  • 윤한기 (동의대학교 기계공학부) ;
  • 김부안 (부경대학교 재료공학부) ;
  • 박원조 (경상대학교 기계항공공학부)
  • Published : 2004.05.01
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Abstract

[ $Si_3N_4$ ] composites have been extensively studied for engineering ceramics, because it has excellent room and high temperature strength, wear resistance properties, good resistance to oxidation, and good thermal and chemical stability. In the present work, carbon short fiber reinforced $Si_3N_4$ ceramics were fabricated by hot press method in $N_2$ atmosphere at $1800^{\circ}C$ using $Al_2O_3\;and\;Y_2O_3$ as sintering additives. Content of carbon short fiber was $0\%,\;0.1\%\;and\;0.3\%$. The composites were evaluated in terms of density, flexural strength and elastic modulus through the 3-point bending test at room temperature. Also, The wear behavior was determined by the pin on disk wear tester using silicon nitride ball. Experimental density and flexural strength decreased with increasing content of carbon fiber. But specific modulus increased with increasing content of carbon fiber. In addition, friction coefficient and specific wear loss decreased with increasing content of carbon short fiber by reason of interfacial defects between matrix and fiber.

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