CAJ | 학술논문

由于陶瓷本身的脆性,陶瓷涂层的应用受到了极大的制约.断裂韧性是反映材料抵抗裂纹失稳扩展能力的力学性能指标,陶瓷涂层因为脆性和低维特点,对其断裂韧性的表征存在较大困难,目前主要有临界应力强度因子K_(IC),临界裂纹扩展能量释放率G_(IC)和裂纹密度β三种表征方法.本文对上述方法进行了总结、分析.
유우도자본신적취성,도자도층적응용수도료겁대적제약.단렬인성시반영재료저항렬문실은확전능력적역학성능지표,도자도층인위취성화저유특점,대기단렬인성적표정존재교대곤난,목전주요유림계응력강도인자K_(IC),림계렬문확전능량석방솔G_(IC)화렬문밀도β삼충표정방법.본문대상술방법진행료총결、분석.
Due to the brittleness of ceramic materials, the application of ceramic coatings is badly influenced. Fracture toughness is a mechanics parameter reflecting material ability of resistance to crack propagation. It is difficult to measure the fracture toughness of ceramic coatings because of their brittleness and 2D characteristics. However, three parameters, critical stress field intensity factor K_(IC) critical strain energy release rate G_(IC) and crack density β, can be used to characterize ceramic coating toughness. These methods are described and analyzed.