窒化ケイ素複合材料の残留応力による高靭化

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タイトル別名
  • Enhancement of Fracture Toughness by Residual Stress in Si<sub>3</sub>N<sub>4</sub> Composites
  • チッカ ケイソ フクゴウ ザイリョウ ノ ザンリュウ オウリョク ニ ヨル コ

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抄録

Fracture toughness of Si3N4 ceramics with and without addition of TaSi2 particles, prepared by hot-pressing at 1750°C and 1650°-1750°C, respectively, was determined. The fracture toughness increased significantly with increasing TaSi2 content. The enhanced toughness by the addition of TaSi2 particles was interpreted to be due to the residual compressive stress resulting from the larger thermal expansion coefficient of TaSi2 than that of Si3N4.

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