Indentation damage zone in calcium and lead titanate ceramics

被引：1
|
作者：
Calderon-Moreno, JM [1 ]
Guiu, F [1 ]
Meredith, M [1 ]
Reece, MJ [1 ]
Sohn, KS [1 ]
机构：
[1] Univ London Queen Mary & Westfield Coll, Dept Mat, London E1 4NS, England
来源：
BRITISH CERAMIC TRANSACTIONS | 1999年 / 98卷 / 06期
关键词：
D O I：
10.1179/096797899680624
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：
Indentation cracks are driven to their equilibrium length by residual stresses produced by the plastic zone beneath the indenter. In the present study, the shape and size of this zone for several lead titanate based materials were investigated. These materials have a range of tetragonal distortions, or c/a ratios. For isotropic unpoled samples the size of the plastic zone can be predicted by elastoplastic theory. The shape of the plastic zone for poled materials is slightly elliptical with the long and short axes perpendicular and parallel to the poling direction respectively.
引用
收藏
页码：296 / 298
页数：3
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