Influence of the electric field on Vickers indentation crack growth in BaTiO3

被引：114

作者：

Schneider, GA ^{[1
]}

Heyer, V ^{[1
]}

机构：

[1] Tech Univ Hamburg Harburg, Adv Ceram Grp, D-21073 Hamburg, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 1999年 / 19卷 / 6-7期

关键词：

BaTiO3 and titanates; ferroelectric properties; toughness and toughening;

D O I：

10.1016/S0955-2219(98)00424-5

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：

In this study, the Vickers indentation method was used to determine the crack growth of ferroelectric barium titanate (BaTiO3) ceramic tinder the influence of electric fields. It was verified that an applied electric field induces distinct anisotropic crack growth parallel and perpendicular to the poling direction which is mainly, interpreted as an anisotropy in fracture toughness. The curve of the measured crack lengths as a function of the applied electric field shows similarity with the strain hysteresis. Curves of cracks parallel and perpendicular to the electric field direction are symmetric to each other. Stress-induced ferroelastic domain switching is used to explain the observed a crack lengths anisotropy and change in fracture toughness. (C) 1999 Elsevier Science Limited. All rights reserved.

引用

页码：1299 / 1306

页数：8

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