Densification and α/β phase transformation of SHSSi3N4 containing Al2O3 and Y2O3 during sintering

被引：4

作者：

Bai, L. ^{[1
]}

Ge, C. C. ^{[1
]}

Shen, W. P. ^{[1
]}

Zhang, K. ^{[1
]}

Mao, X. D. ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Lab Special Ceram & Powder Met, Beijing 100083, Peoples R China

来源：

PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3 | 2007年 / 561-565卷

关键词：

self-propagating high-temperature synthesis (SHS); Si3N4; densification; phase transformation; SILICON-NITRIDE; MICROSTRUCTURE; MGO;

D O I：

10.4028/www.scientific.net/MSF.561-565.577

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The densification and phase transformation of high a-phase silicon nitride powder synthesized by SHS with a combination Of Y2O3 and Al2O3 sintering additives were investigated. The densification process occurred rapidly from 1400 to 1500 degrees C and was nearly finished at 1500 degrees C. However, the a-P transformation of silicon nitride progressed rapidly from 1500 to 1600 degrees C, and completed at 1600 degrees C. The phase transformation of silicon nitride lagged behind the densification of Si3N4 ceramics. It showed that the solution and precipitation process did not play the main role in the densification of silicon nitride. The sufficient amount of liquid phase was crucial to complete the densification.

引用

页码：577 / +

页数：2

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