Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference (한국윤활학회:학술대회논문집)

Korean Tribology Society (한국트라이볼로지학회)
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The effect of impact directions and angels on erosion behavior of undirectionally oriented sillicon nitride

충돌 방향과 각도가 일방적으로 배향된 질화규소의 Erosion 거동에 미치는 영향

  • 조창희 (고려대학교 재료공학과) ;
  • 최현주 (고려대학교 재료공학과) ;
  • 임대순 (고려대학교 재료공학과) ;
  • 정정식 (한국기계연구원 세라믹재료그룹) ;
  • 박동수 (한국기계연구원 세라믹재료그룹)
  • Published : 2001.11.01
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Abstract

Silicon nitride based ceramics reinforced with 3wt% Si$_{3}$N$_{4}$ whisker was prepared by tape casting to investigate the effect of microstructure on erosion behaviors. Hardness and fracture toughness were measured with prepared specimens. A gas blast type erosion tester was used to examine the erosion behavior of the specimens with different impact directions and angles. The erosion rate increases with increasing impact angle. Erosion rate of the silicon nitride ceramics also depends on the grain orientations, The erosion rate was lowered when impaction direction was parallel to the grain orientation This result was explained by the crack deflection and bridging due to the grain orientation.

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