EVALUATION OF THE CRACK FACE BRIDGING MECHANISM IN A MGAL2O4 SPINEL

被引：18
作者：
WHITE, KW
KELKAR, GP
机构：
[1] Department of Mechanical Engineering, University of Houston, Houston, Texas
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1991年 / 74卷 / 07期
关键词：
FRACTURE; TOUGHENING; MECHANISM; MONOLITHS; CRACK GROWTH RESISTANCE;
D O I：
10.1111/j.1151-2916.1991.tb07174.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 effectiveness of a grain bridging mechanism in the following wake zone of two MgAl2O4 spinel microstructures has been demonstrated through renotching experiments with double-cantilevered-beam (DCB) specimens. Measurements of dK(R)/d-DELTA-a agree with previous crack growth resistance curves of similar materials, obtained from single-edge-notch-beam specimens. However, even the extended test ligaments available from the present DCB specimens did not permit the full development of the following wake zone of these coarse microstructures.
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页码：1732 / 1734
页数：3
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