陶瓷材料磨削裂纹扩展行为研究  

Study on the ceramic grinding crack propagation

作　　者：袁东[1] 程金生[1] 杨润泽[1] 苏官灵[1] 黄雪刚[1] 张波[2] 

机构地区：[1]军械工程学院机械制造教研室 [2]沈阳军区联勤部65165部队

出　　处：《机械设计与制造》2011年第4期144-146,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金项目资助(50672131)

摘　　要：探讨了陶瓷磨削裂纹源的来源、形成及扩展过程。同时,运用陶瓷微观结构的有关知识结合压痕断裂力学,分析了Al2O3-ZrO2(4Y)和TiC-TiB2陶瓷磨削裂纹的特征。磨削实验发现:由于在陶瓷中存在弱界面,裂纹易在此处形成,并发生偏转、分支和桥联等形式,使得材料中裂纹的扩展呈现不连续性。The origin,process of establishment and creating about the grinding crack of ceramics were discussed in the article,meanwhile,the characteristic of grinding crack for the ceramics of Al2O3-ZrO2（4Y）and TiC-TiB2 were analyzed with the relevant knowledge of micromechanism and the Indentatin Mechanics.Due to the weak interface in the ceramics,the micro-crack and crack deflection,branching and bridging were formed in the ceramics,which lead to discontinuity of crack propagating in ceramic.

关 键 词：工程陶瓷 裂纹扩展 磨削裂纹 

分 类 号：TH14[一般工业技术—材料科学与工程] TH12[机械工程—机械制造及自动化]