한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제18권9호
  • /
  • Pages.82-88
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  • 2001
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

SiC계 세라믹 절삭공구의 절삭특성 평가 Part 1: SiC계 절삭공구의 미세구조와 기계적 특성

Cutting Characteristics of SiC-based Ceramic Cutting Tools Part 1: Microstructure and Mechanical Properties of SiC-based Ceramic Cutting Tools

  • 박준석 (서울시립대학교 기계정보공하과 대학원) ;
  • 김경재 (서울시립대학교 기계정보공하과 대학원) ;
  • 심완희 (서울시립대학교 재료공학과 대학원) ;
  • 권원태 (서울시립대학교 기계정보공학과) ;
  • 김영욱 (서울시립대학교 재료공학과)
  • 발행 : 2001.09.01
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초록

In order to fulfil the requirements of the various performance profiles of ceramic cutting tools, six different SiC-based ceramics have been fabricated by hot-pressing (SiC--${Si}_3 {N}_4$composites) or by hot-pressing and subsequent annealing (monolithic SiC and SiC-TiC composites). Correlation between the annealing time and the corresponding microstructure and the mechanical properties of resulting ceramics have been investigated. The grain size of both ${Si}_3 {N}_4$and SiC in SiC-${Si}_3 {N}_4$composites increased with the annealing time. Monolithic SiC has the highest hardness, SiC-TiC composite the highest toughness, and the SiC-${Si}_3 {N}_4$composite the highest strength among the ceramics investigated. The hardness of SiC-${Si}_3 {N}_4$composites was relatively independent of the grain size, but dependent on the sintered density. The cutting performance of the newly developed SiC-based ceramic cutting tools will be described in Part 2 of this paper.

키워드

참고문헌

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