Damage evolution in ferroelectric PZT induced by bipolar electric cycling

被引：170

作者：

Nuffer, J ^{[1
]}

Lupascu, DC ^{[1
]}

Rödel, J ^{[1
]}

机构：

[1] Tech Univ Darmstadt, Dept Mat Sci, D-64287 Darmstadt, Germany

来源：

ACTA MATERIALIA | 2000年 / 48卷 / 14期

关键词：

fatigue; ferroelectricity; acoustic methods; piezoelectricity; lattice defects;

D O I：

10.1016/S1359-6454(00)00173-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fatigue behaviour of commercial bulk Lead Zirconate Titanate (PZT) induced by bipolar cycling was investigated. Polarisation and strain hysteresis loops as well as acoustic emissions (AE) were monitored. Higher cycling fields (2xE(c)) yield stronger fatigue, higher AE energy values and lower threshold values for the onset of AE events at high cycle numbers. AE amplitudes and energies were found to be a measure For the degree of domain damping. Cycling at 2 E-c leads to an increasing asymmetry of the strain hysteresis, which is explained by an offset polarisation. Corrosion paths were observed by SEM, most numerously in the centre of a strongly fatigued sample. A damage scenario based on domain wall clamping due to the coalescence of point defects is presented. (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：3783 / 3794

页数：12

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