Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of $Si_3N_4$ Whisker and SiC Platelet Addition on Phase Transformation and Mechanical Properties of the $\alpha/\beta$ Sialon Matrix Composites

보강재로 첨가된 $Si_3N_4$ Whisker와 SiC Platelet가 $\alpha/\beta$ Sialon 복합체의 상변태와 기계적 물성에 미치는 영향

  • 한병동 (고려대학교 재료공학과) ;
  • 임대순 (고려대학교 재료공학과) ;
  • 박동수 (한국기계연구원 요업재료그룹) ;
  • 이수영 (한국기계연구원 요업재료그룹) ;
  • 김해두 (한국기계연구원 요업재료그룹)
  • Published : 1995.12.01
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Abstract

α/β sialon based composites containing silicon nitride whisker and silicon carbide platelet were fabricated by hot pressing. Effect of the reinforcing agents on the α to β phase transformation of the sialon as well as on the mechanical properties was investigated. Silicon nitride whisker and silicon carbide platelet promoted the phse transformation. TEM/EDS analysis revealed that the grain containing the whisker had 'core-rim' structure; core being high purity Si3N4 whisker and rim being β-sialon. Flexural strength of the composite decreased with the reinforcement addition which, on the other hand, improved fracture toughness of it. High temperature strength was measured at 1300℃ to be about 130 MPa lower than that measured at RT for the whisker reinforced composites.

Keywords

References

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