Crack-healing behavior under stress and fatigue strength at elevated temperature of crack-healed Si3N4/SiC composite ceramics

被引：3

作者：

Ando, K

Houjyou, K

Chu, MC

Takahashi, K

Yao, F

Sato, S

机构：

[1] Yokohama Natl Univ, Dept Energy & Safety Engn, Yokohama, Kanagawa 2408501, Japan

[2] NHK Spring, Kanazawa Ku, Yokohama, Kanagawa, Japan

来源：

EURO CERAMICS VII, PT 1-3 | 2002年 / 206-2卷

关键词：

silicon nitride; crack-healing; service temperature; crack-healing under stress; cyclic fatigue strength; static fatigue strength; new healing process;

D O I：

10.4028/www.scientific.net/KEM.206-213.819

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：

Si3N4/SiC composite ceramics were sintered and subjected to three-point bending. A semi-circular surface crack of 100 mum in diameter was made on each specimen. We systematically studied crack-healing behavior, cyclic and static fatigue strengths at 1000 degreesC by using three kinds of specimens (smooth, cracked and crack-healed). Si3N4/SiC Composite ceramics could heal a crack even under cyclic stress at 1000 degreesC. New crack healing processes have been proposed. The sample crack-healed at 1000 degreesC had sufficient static and cyclic fatigue strengths at 1000 degreesC.

引用

页码：819 / 822

页数：4

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