一方向連続SiC繊維強化ガラス基複合材料の熱衝撃による微視損傷

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タイトル別名
  • Microdamage in SiC Fiber-Reinforced Glass Matrix Composite by Repeated Thermal Shocks
  • 1ホウコウ レンゾク SiC センイ キョウカ ガラスキ フクゴウ ザイリョウ

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Continuous SiC fiber (NicalonTM) fiber-reinforced glass matrix composite was studied on microdamage evolution process by repeated thermal shocks at ΔT=700 and 800K. The composite was subjected to the shock up to five times. The multiple matrix crackings perpendicular to the fiber axis were observed at the surface and the number of crackings increased with the number of cycles, however, their depths were unchanged. The damage did not occurred at ΔT=700K while damage occurred at ΔT=800K and this temperature difference was about 400K higher than the damage initiation temperature difference of a monolithic glass matrix. Cracks parallel to through the thickness direction were also observed and the number of cracks increased with the increase of N. The characteristics of damage evolution process of the composite were discussed based on a set of the experimental evidences.

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