Electric-Field-Induced Crack Growth at Electrode Edge in Piezoelectric Ceramics, International Journal of Modern Physics
Electric-Field-Induced Crack Growth at Electrode Edge in Piezoelectric Ceramics, International Journal of Modern Physics
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压电陶瓷电极边缘电场诱导裂纹扩展，国际现代物理学杂志
DOI：
10.1142/s2010194512002905
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Kazuhiro Kusukawa
中科院分区：
文献类型：
--
作者：
Zhigang Wang;Haojie Li;Shinya Nakano;松木孝信・齋藤賢一;Takanobu Matsuki and Ken-ichi Saitoh;Kazuhiro Kusukawa
研究了极化锆钛酸铅在循环电载荷作用下的小裂纹扩展行为。在加载过程中，位于部分电极边缘的裂纹沿电极边界沿着生长。裂纹扩展速率随着裂纹长度的增加而减小，直到达到非扩展裂纹。非扩展裂纹的扩展速率和裂纹长度受电载荷幅值和偏压水平的影响。在高幅加载或负偏压加载的情况下，裂纹扩展速率变化很大，因为域切换。三维可渗透裂纹的有限元分析表明，模式III应力强度因子的范围是独立的裂纹长度，但它作为一个正电场的摩擦力的结果减少。断口观察表明，沿晶开裂是占主导地位的非扩展裂纹的尖端附近。
Small crack growth behavior in poled lead zirconate titanate was examined under cyclic electric loading. A crack located at the edge of a partial electrode grew along the electrode boundary during the loading. The crack growth rate decreased with increasing crack length until a non-propagating crack was reached. The growth rate and crack length of the non-propagating crack were affected by the amplitude and bias levels of the electric loading. In the case of high-amplitude loading or negative-biased loading, the crack growth rate varied considerably because of domain switching. Finite element analysis of a three-dimensional permeable crack showed that the mode III stress intensity factor range is independent of crack length, but it decreases as a result of the frictional force of a positive electric field. Fracture surface observations showed that intergranular cracking is dominant near the tip of the non-propagating crack.