Microstructure control and mechanical properties of porous silicon nitride ceramics

被引：24

作者：

Shan, Shao-yun ^{[1
,2
]}

Jia, Qing-ming ^{[1
]}

Jiang, Li-hong ^{[1
]}

Wang, Ya-ming ^{[1
]}

Yang, Jian-feng ^{[2
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Chem Engn, Kunming 650224, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2009年 / 35卷 / 08期

关键词：

Mechanical properties; Porous; Silicon nitride; Microstructure control; CARBOTHERMAL NITRIDATION; SINTERING BEHAVIOR; POROSITY; SI3N4;

D O I：

10.1016/j.ceramint.2009.06.009

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：

Porous silicon nitride ceramics with a fibrous interlocking microstructure were synthesized by carbothermal nitridation of silicon dioxide. The influences of different starting powders on microstructure and mechanical properties of the samples were studied. The results showed that the microstructure and mechanical properties of porous silicon nitride ceramics depended mostly on the size of starting powders. The formation of single-phase beta-Si3N4 and the microstructure of the samples were demonstrated by XRD and SEM, respectively. The resultant porous Si3N4 ceramics with a porosity of 71% showed a relative higher flexural strength of 24 MPa. (c) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：3371 / 3374

页数：4

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