R-curve behavior of BaTiO3- and PZT ceramics under the influence of an electric field applied parallel to the crack front

被引：68

作者：

Kolleck, A

Schneider, GA

Meschke, FA

机构：

[1] Tech Univ Hamburg, Adv Ceram Grp AB 5 08, D-21073 Hamburg, Germany

[2] Forschungszentrum Julich, IWV 2, D-52425 Julich, Germany

来源：

ACTA MATERIALIA | 2000年 / 48卷 / 16期

关键词：

ferroelectricity; piezoelectricity; fracture and fracture toughness;

D O I：

10.1016/S1359-6454(00)00198-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fracture resistance curves (R-curves) of BaTiO3 and commercial PZT-PIC 151 were measured with compact tension specimens under the influence of an electric field applied parallel to the crack front. A strong influence of the electric field on the starting and plateau value was found as well as on the length of the R-curve, Generally a toughness increase was detected with increasing electric field. The toughening effect is estimated from the change in crack tip stress intensity induced by ferroelastic domain switching near the crack tip using the weight function formalism developed for stress-induced transformation toughening of zirconia ceramics. In order to obtain a quantitative prediction of toughening, ferroelastic and ferroelectric properties were measured, (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved

引用

页码：4099 / 4113

页数：15

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