CRACK SHIELDING IN CERIA-PARTIALLY-STABILIZED ZIRCONIA

被引：25

作者：

MARSHALL, DB

机构：

[1] Rockwell International Science Center, Thousand Oaks, California

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 10期

关键词：

cerium; fracture toughness; shielding; tetragonal zirconia polycrystals; transformations;

D O I：

10.1111/j.1151-2916.1990.tb06732.x

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 crack tip shielding stress intensity factor has been calculated for several elongated transformation zone shapes observed in high‐toughness ceria‐zirconia ceramics. The results show that the measured increases in fracture toughness of these materials are consistent with the crack tip shielding mechanism, to which the toughening of other zirconia ceramics has been attributed. Moreover, the presence of a very elongated zone ahead of a steady‐state crack is shown to decrease the degree of shielding compared with that of a zone with semicircular frontal shape and equivalent width by a factor of about 2. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：3119 / 3121

页数：3

共 14 条

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