Growth mechanism of Y α-SiAlON whiskers prepared by combustion synthesis

被引：9

作者：

Liu, GH

Chen, KX ^{[1
]}

Zhou, HP

Ning, XS

Pereira, C

Ferreira, JMF

机构：

[1] Tsing Hua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Univ Aveiro, CICECO, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal

来源：

JOURNAL OF MATERIALS RESEARCH | 2005年 / 20卷 / 04期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1557/JMR.2005.0119

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Novel Y alpha-SiAlON whiskers with high aspect ratios were prepared by combustion synthesis, except for common isotropic grains. The growth process of whiskers was investigated, and experimental results showed that the predominant growth mode of whiskers was the vapor-liquid-solid (VLS) mechanism. In contrast to the usual situation, here the liquid phase played two roles during the growth of Y alpha-SiAlON whiskers; that is to say, in addition to acting as a medium for mass transportation, the liquid phase took part in reactions itself. It was also found that proper addition of Fe2O3 could facilitate the development of whiskers with no remarkable deterioration on the phase assemblage of combustion products.

引用

页码：889 / 894

页数：6

共 13 条

[1] Synthesis of β-silicon nitride by SHS:: fiber growth [J].