陶瓷材料断裂源的声发射表征  

EXPRESSION CHARACTERIZATION OF FRACTURE SOURCE BY ACOUSTIC EMISSION IN CERAMIC MATERIALS

作　　者：杜伟坊 杜海清[1] 李玉书[1] 

机构地区：[1]湖南师范大学化学系,湖南大学材料科学及应用化学研究所

出　　处：《硅酸盐学报》1994年第5期480-483,共4页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金

摘　　要：研究了陶瓷材料在断裂过程中断裂源所激发的特征声发射信号，并将陶瓷材料断裂过程中所激发的声发射与扫描电镜形貌观察结合起来，建立了断裂源、断裂形貌与特征声发射信号之间的对应关系，发现陶瓷材料的断裂源不同，其相应的特征声发射图谱也具有不同的特征，从而使声发射成为陶瓷材料结构缺陷评估的新方法。AE signals actuated by the fracture source in ceramics during failure were studied. By use of the AE signals actuated in the fracturing process combined with SEM ohservation, the relation between fracture source,fractograph and AF signal was found.The experimental results show that the characteristic AE curve varies with the fracture source,Thus,AE is a new evaluation method for the structural defects in ceramic ma-terials.

关 键 词：陶瓷材料 断裂过程 断裂源 声发射 

分 类 号：TQ174.13[化学工程—陶瓷工业]