표면 균열을 가지는 SiC/SiC 복합재의 강도 특성

다국어 초록 (Multilingual Abstract)

SiC/SiC composites are among the most promising structural materials for fusion because of their potential application for high performance reactors and superior safety characteristics compared to metallic materials. And a recently developed SiC fiber, Tyranno-SA, was also used as the reinforcement in several SiC/SiC composites. In this study, we examined the relationship between various crack size and bending strength in order to analyze the mechanical properties under the room temperature. The mechanical properties and fracture behaviors were investigated using three-point bending test. The test results showed that a difference of the orientation of SiC fiber causes the variation of bending strength and crack propagation behavior. In order to clarify the cause of these phenomena, we observed an aspect of crack growth regarding both unidirectional composite specimen and cross ply composite specimen using a scanning electron microscope. And it was showed that crack healing effect by coating SiO₂ nano colloidal on SiC/SiC composite ceramics was not confirmed clearly.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 재료 및 실험방법
• 3. 결과 및 고찰
• 4. 결론
• 참고문헌