Tubular channel growth in piezoelectric ceramics under electric fields

被引：0
|
作者：
S. Lin
H. G. Beom
D. Tao
机构：
[1] Inha University,Department of Mechanical Engineering, College of Engineering
来源：
Acta Mechanica | 2010年 / 210卷
关键词：
Piezoelectric Material; Breakdown Voltage; Conductive Channel; Electrical Loading; Piezoelectric Ceramic;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Tubular channel growth in a piezoelectric material with a conductive channel is investigated. Breakdown tests are performed on PZT807 samples with cylindrical bar shapes under purely electrical loading. It is experimentally observed that dielectric breakdown occurs via the formation of tubular channels, and the new tubular channel propagates in a straight direction through the specimen. The three-dimensional J integral for a tubular channel is used as a criterion for dielectric breakdown failure. The J integral at the onset of breakdown is calculated numerically through finite element analysis. The critical J integrals at the onset of breakdown are obtained.
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页码：47 / 55
页数：8
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