ゾルゲル法による炭化ケイ素ウィスカー／シリカガラス複合材料の製造

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タイトル別名
  • Preparation of SiC whisker/silica glass composites by the sol-gel method.
  • ゾル ゲルホウ ニ ヨル タンカ ケイソ ウィスカー シリカ ガラス フクゴウ

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説明

SiC whisker (SiCw)/silica glass composites were prepared from tetramethylorthosilicate, silica fine powder and SiCw by the sol-gel method. An optimum condition for the gel preparation and the following HIP sintering was investigated. Employment of the optimum sol composition and aging of the resultant gel made it possible to obtain crack-free SiCw/SiO2 gel in which SiCw was dispersed homogeneously. HIP sintering under the condition of 1, 000°C, 30 MPa, 2 h was optimum since the crystallization of the glass matrix to cristobalite could be avoided. Theoretically dense composites were obtained up to 15 vol % SiCw. A maximum fracture toughness of 2.3 MPa m1/2 was obtained.

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