Effect of crack-healing process on fatigue strength of Si3N4/SiC ceramics at 1000°C

被引：0

作者：

Hojo, K

Ando, K

Chu, MC

Sato, S

机构：

[1] Yokohama Natl Univ, Yokohama, Kanagawa, Japan

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

[3] NHK Spring Co Ltd, Kanazawa Ku, Yokohama, Kanagawa, Japan

来源：

ADVANCED CERAMICS AND COMPOSITES | 2003年 / 247卷

关键词：

ceramics; crack-healing; fatigue; high temperature; recovery; service condition; Si3N4; strength;

D O I：

10.4028/www.scientific.net/KEM.247.271

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-healing processes Of Si3N4/SiC composite ceramics were investigated. A surface crack of 2C = I 00 mum was introduced on several the surfaces of several specimens and the cracks were healed by several kinds of healing process at 1000degreesC. Both bending and fatigue tests were then carried out at 1000degreesC. The following results were obtained. The sample healed completely at 1000degreesC under stress. The healing processes had a large effect on fatigue strengths. Multi-healing process such as cyclic heating very effectively increased the fatigue strength of the crack-healed zone. The increase of fatigue strength was caused by the sufficient crystallization of the healing material SiO2.

引用

页码：271 / 274

页数：4

共 6 条

[1] Fatigue strength of crack-healed Si3N4/SiC composite ceramics [J].