Fracture toughness of SiC, Si3N4, and sialon ceramics using controlled surface flaws

被引：3
|
作者：
Cook, SG [1 ]
King, JE [1 ]
Little, JA [1 ]
机构：
[1] UNIV CAMBRIDGE,DEPT MAT SCI & MET,CAMBRIDGE CB2 1TN,ENGLAND
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 1996年 / 12卷 / 04期
关键词：
D O I：
10.1179/mst.1996.12.4.366
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Knoop and Vickers indentation cracks have frequently been used as model 'precracks' in ceramic bend specimens for fracture toughness (K-1c) determination. Indentation residual stress reduces the measured K-1c but can be removed or accounted for by grinding, annealing, or modelling. Values of K-1c are obtained for four materials using Vickers indentations and an improved stress intensity factor. Methods for residual stress removal or incorporation are compared, and the most reliable stress removal alternative is identified for each material. (C) 1996 The Institute of Materials.
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页码：366 / 370
页数：5
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