Effect of foaming pressure on the properties of porous Si3N4 ceramic fabricated by a technique combining foaming and pressureless sintering

被引：16
作者：
Li, Xiangming [1 ,2 ]
Wu, Pute [2 ]
Zhu, Delan [1 ,2 ]
机构：
[1] Northwest A&F Univ, Coll Water Resources & Architecture Engn, Yangling 712100, Shaanxi, Peoples R China
[2] Northwest A&F Univ, Inst Water Saving Agr Arid Areas China, Yangling 712100, Shaanxi, Peoples R China
来源：
SCRIPTA MATERIALIA | 2013年 / 68卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Si3N4; Porous; Foaming; Microstructure; Mechanical properties; SILICON-NITRIDE CERAMICS; MECHANICAL-PROPERTIES; DIELECTRIC-PROPERTIES; MICROSTRUCTURE;
D O I：
10.1016/j.scriptamat.2013.02.033
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
To fabricate porous Si3N4 ceramics with a complex shape easily, a simple and low-cost technique combining foaming and pressureless-sintering is explored. The foaming pressure has a decisive effect on the microstructure, pore size distribution, porosity and mechanical properties of the porous Si3N4 ceramics. As the foaming pressure increases, the porous Si3N4 ceramics become uniform in microstructure, change gradually in pore size distribution from bimodal to unimodal, slowly reduce in porosity and pore size, and improve significantly in mechanical properties. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：877 / 880
页数：4
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