Preparation and study of porous Si3N4 ceramics with high strength

被引：0

作者：

Zhang, Y ^{[1
]}

Wang, HJ ^{[1
]}

Zhang, W ^{[1
]}

Jin, ZH ^{[1
]}

机构：

[1] Xian Jiaotong Univ, Xian 710049, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2004年 / 33卷 / 06期

关键词：

porous ceramics; silicon nitride; silicon carbide;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Porous Si3N4 ceramics with high strength and high porosity were obtained by the addition of small amount of carbon. The effects of carbon content, sintering temperature and reaction time on porous Si3N4 ceramics were studied. It was showed that SiC particles could pin the beta-Si3N4 grains boundaries and had an effective reinforcing effect, which formed through reaction of the added carbon with SiO2 on the Si3N4 surface or with the Si3N4 particles themselves. Sintered Si3N4 porous ceramics with 100MPa strength and > 40% porosity were obtained when the carbon content was 5wt%, and the sintering temperature was 780degreesC.

引用

页码：655 / 658

页数：4

共 11 条

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