The Korean Journal of Ceramics

한국세라믹학회 (The Korean Ceramic Society)
권호 표지

Hot Pressing of the Silicon Nitride Based Ceramics and Their Mechanical Behavior

  • Park, D.S. (Ceramic Materials Group, KIMM, 66 Sang Nam Dong) ;
  • Lee, S.Y. (Ceramic Materials Group, KIMM, 66 Sang Nam Dong) ;
  • Kim, H.D. (Ceramic Materials Group, KIMM, 66 Sang Nam Dong) ;
  • Park, W.S. (Dept. of Materials Eng., Korea University) ;
  • D.S. Lim (Dept. of Materials Eng., Korea University) ;
  • B.D. Han (Dept. of Materials Eng., Korea University)
  • 발행 : 1995.03.01
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초록

Four kinds of silicon nitride based ceramic materials have been hot pressed. Effect of the sintering additives on the phase transformation, microstructural development and mechanical properties was investigated. While sintering under the same condition a big difference among the microstructures of the specimens, they appeared alike if sintered to have a similiar $\alpha$-$\beta$ phase ratio. The specimen of the stoichiometric $\alpha$-$\beta$ sialon composition showed very limited amount of the intergranular glassy phase and a significant degree of the residual stress. It exhibited almost no strength degradation up to $1300^{\circ}C$, and the strength of the specimen degraded more as its composition deviated from the stoichiometry.

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참고문헌

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