Crack growth in lead magnesium niobate: lead titanate ceramics by cyclic electric fields

机译：铌酸铅镁的裂纹扩展：循环电场产生的钛酸铅陶瓷

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Pre-existing cracks introduced by a Vickers diamond hardness indenter in PMN-0.3PT, which displays piezoelectric properties, increase in length under the action of low frequency cyclic electric fields applied normal to the crack. A minimum applied field of 1.1 x EC is required to cause crack growth. In applied fields of 1.85-5.70 x Ec cracks grow to a common limiting length which is approximately 0.8 times the separation between the electrodes. New cracks are not generated at the corners of a Vickers diamond indent by applied fields up to 5.70 x Ec.

机译：由维氏金刚石硬度压头在PMN-0.3PT中引入的，显示压电特性的预先存在的裂纹，在垂直于裂纹的低频循环电场的作用下，其长度增加。导致裂纹扩展的最小外加电场为1.1 x EC。在1.85-5.70 x Ec的外加电场中，裂纹扩展到共同的极限长度，约为电极间距的0.8倍。通过施加至5.70 x Ec的磁场，不会在维氏钻石凹痕的角上产生新的裂纹。

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来源
《Active Materials: Behavior and Mechanics》|2004年|P.513-518|共6页
会议地点 San Diego CA(US)
作者
S.H. Ferguson; H.W. King; D.F. Waechter; R. Blacow; S.E. Prasad;
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作者单位

University of Victoria, Department of Mechanical Engineering Victoria, BC, Canada V8W 3P6;

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会议组织
原文格式 PDF
正文语种 eng
中图分类工程材料一般性问题;
关键词
piezoelectric; PMN-PT; fracture; crack propagation;

机译：压电; PMN-PT;断裂;裂纹扩展;

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Crack growth in lead magnesium niobate: lead titanate ceramics by cyclic electric fields

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