基于声发射的陶瓷材料损伤和增韧特性研究  

Damage and Toughening Characteristics of Ceramic by Acoustic Emission Method

作　　者：赵海涛[1] 褚亮 

机构地区：[1]海军驻南京地区航天机电系统军事代表室,南京210006 [2]北京强度环境研究所,北京100076

出　　处：《中国陶瓷》2017年第12期39-45,共7页China Ceramics

摘　　要：陶瓷作为准脆性材料,在受载破坏过程中会产生大量的声发射信号。应用声发射及其定位技术研究了95%氧化铝(AD95)陶瓷,氧化锆增韧氧化铝(ZTA)陶瓷单轴压缩加载下的裂纹扩展过程。通过Geiger定位方法对巴西劈裂实验中两种陶瓷破裂过程进行实时监测,并对结果进行分析。研究结果表明,声发射定位实验可以直观的反映陶瓷材料裂纹成核,扩展,贯通的过程。通过声发射事件数和信号幅度可以分析氧化锆对氧化铝陶瓷的增韧效果。Ceramic is a kind of quasi-brittle material, and it will generate a large number of acoustic emission signals in the process of loading damage. Acoustic emission（AE） locating technique was applied to studying Fracture Process of the 95% Alumina Ceramics and zirconia toughened alumina（ZTA） under uniaxial compression conditions. The location result of Geiger algorithm was analyzed with their location accuracies comparatively through Brazilian Split test. The results showed that the location of the acoustic emission and ceramics failures were consistent and the location results could reflect the process of micro-crack initiation, propagation, and breakthrough accurately. Zirconia toughening effect can be analyzed through the acoustic emission events and signal amplitude.

关 键 词：陶瓷材料 巴西劈裂实验 Geiger算法 声发射 增韧特性 

分 类 号：TQ174.13[化学工程—陶瓷工业]