P59 ムライト/炭化ケイ素マルチ複合材料の応力下におけるき裂治癒挙動と応力下治癒材の高温疲労強度特性(OS13)

概要

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Mullite reinforced with SiC whiskers and SiC particles, called here Mullite/SiC multi-composite, having high crack-healing ability and high fracture toughness was hot-pressed. A semi-elliptical surface crack was introduced on the test specimen. To heal the surface crack, the specimens were heat-treated at 1200℃ for 5h in air under constant or cyclic stress, and the resultant bending strength and fatigue strength were investigated at the healing temperature. The main conclusions are as follows: (1) The specimens could be healed even under stress, and the threshold stress for crack-healing was 170MPa. (2) The crack-healed specimens had high bending strength and high fatigue strength even at the healing temperature.
一般社団法人日本機械学会の論文
2006-08-03