Engineering ceramics are superior in strength than metal at high temperature. However, they are brittle and sensitive to flaws. As a result, the structural integrity of a ceramics component may be seriously affected. Whereas, some engineering ceramics have the ability of crack-healing. If this ability could be used in engineering ceramics components, their reliability will be increased and their life time will also prolonged. This study focuses on the crack-healing behavior of commercial SiC

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... amics. Three point bending specimen was made from commercial SiC ceramics. A crack-healing behavior as a function of crack-healing time and fracture behavior of crack-healed member were systematically studied. The main conclusions obtained were following; (1) Recommended crack-healing condition by this study was lh at 1773K in air. (2) Maximum crack size which can be healed completely was semi-elliptical surface 878K. (4) Base material is not sensitive to static fatigue, but crack-healed zone is quite sensitive to static fatigue at room temperature.