Preparation of SiC-AlN Ceramic Alloy Powder by Direct Reaction between Constituent Elements and Property Evaluation of its Sintered Compacts.

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  • Sugimori Masanobu
    Graduate School, Tohoku University
  • Li Jing-Feng
    Department of Materials Processing, Graduate school of Engineering, Tohoku University
  • Watanabe Ryuzo
    Department of Materials Processing, Graduate school of Engineering, Tohoku University

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  • ニューコンポジット材料　　構成元素間直接反応法により合成したＳｉＣ‐ＡｌＮセラミックアロイ粉焼結体の特性評価
  • コウセイ ゲンソカン チョクセツ ハンノウホウ ニ ヨリ ゴウセイシタ SiC

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Abstract

Fine powders of SiC-A1N ceramic alloy were synthesized by direct reactions of a powder premix of Si, C and Al powders in nitrogen, i.e. Si+C+xAl+(x/2)N2=SiC:xAIN. The synthesized powders showed a good sinterability; dense compacts were fabricated by hot-isostatic pressing at relatively low temperature (2123K) without additives, or by pressureless sintering with Y2O3 as a sintering additive. The obtained SiC-A1N alloys showed better mechanical properties than the monolithic SiC and A1N; for example a two to threefold increase in fracture strength was achieved.

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