Effects of carbon source on microstructural evolution and sintering behavior of porous silicon nitride ceramics

被引：32
作者：
Shan, Shao-Yun
Yang, Jian-Feng [1 ]
Lu, Yuan
Gao, Ji-Qiang
Niihara, Koichi
机构：
[1] Xian Jiaotong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Nagaoka Univ Technol, Extreme Energy Dens Res Inst, Niigata 9402188, Japan
来源：
SCRIPTA MATERIALIA | 2007年 / 56卷 / 03期
关键词：
porous material; silicon nitride; scanning electron microscopy (SEM); bending test;
D O I：
10.1016/j.scriptamat.2006.10.012
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Porous beta-Si3N4 ceramics were fabricated by carbothermal reaction between silica and carbon. The influences of carbon source on microstructure and the sintering behavior of the samples obtained via different sintering processes were studied. The results showed that phase composition and microstructure varied with carbon source. The resultant porous beta-Si3N4 ceramics with nanometer carbon had finer microstructure, more uniform pore structure, lower weight loss and linear shrinkage, and higher flexural strength than those using micrometer carbon. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：193 / 196
页数：4
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