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>Crack-Healing Behavior Under Stress and Fatigue Strength at Elevated Temperature of Crack-Healed Si_3N_4/SiC Composite Ceramics
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Crack-Healing Behavior Under Stress and Fatigue Strength at Elevated Temperature of Crack-Healed Si_3N_4/SiC Composite Ceramics
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机译：Crack-Healing Behavior Under Stress and Fatigue Strength at Elevated Temperature of Crack-Healed Si_3N_4/SiC Composite Ceramics
Si_3N_4/SiC composite ceramics were sintered and subjected tothree-point bending. A semi-circular surface crack of 100 μm indiameter was made on each specimen. We systematically studiedcrack-healing behavior, cyclic and static fatigue strengths at 1000℃ by using three kinds of specimens (smooth, cracked andcrack-healed). Si_3N_4/SiC composite ceramics could heal a crack evenunder cyclic stress at 1000℃. New crack healing processes have beenproposed. The sample crack-healed at 1000℃ had sufficient static andcyclic fatigue strengths at 1000℃.
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