Microcrack clouds in fatigued electrostrictive 9.5/65/35 PLZT

被引：34

作者：

Nuffer, J ^{[1
]}

Lupascu, DC ^{[1
]}

Rödel, J ^{[1
]}

机构：

[1] TH Darmstadt, Inst Sci Mat, D-64287 Darmstadt, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2001年 / 21卷 / 10-11期

关键词：

fatigue; ferroelectric properties; fracture; PLZT;

D O I：

10.1016/S0955-2219(01)00032-2

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The formation of microcracks during cyclic bipolar fatigue is shown for purely dielectric electrostrictive 9.5/65/35 transparent lead-lanthanum-zirconate-titan ate (PLZT). The optically transparent material allows for the direct observation of broken grain facets. The maximum reached polarisation decreases by 30% after 3 x 10(6) cycles. The formation of microcrack clouds at the specimen edges and at macroscopic cracks are shown. No cracks were found in sample regions without obvious flaws present. By estimating the cracked volume, comparisons with FEM from previous studys allow to calculate the influence of the observed cracking on the polarization. As a consequence, the observed microcracks are considered to be mainly responsible for polarisation degradation. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1421 / 1423

页数：3

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