Densification and α/β phase transformation of Si3N4 containing MgO and CeO2 during sintering

被引：13

作者：

Yang, HT ^{[1
]}

Yang, GT

Yuan, RZ

机构：

[1] Wuhan Univ Technol, State Key Lab Hybrid Mat, Wuhan 430070, Peoples R China

[2] Cent S Univ Technol, Changsha 410083, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 1998年 / 55卷 / 02期

关键词：

silicon nitride; densification; phase transformation;

D O I：

10.1016/S0254-0584(98)00131-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper deals with the densification and phase transformation during sintering of silicon nitride with MgO-CeO2 as sintering aids. For Si3N4-MgO-CeO2 ceramics, the densification occurs rapidly from 1500 degrees C and nearly ends at 1550 degrees C; the phase transformation from alpha-Si3N4 to beta-Si3N4 occurs rapidly from 1550 to 1600 degrees C and nearly ends at 1600 degrees C. The phase-transformation process lags behind the densification process, showing that the solution and reprecipitation do not play a major role in the densification of the Si3N4-MgO-CeO2 system, (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：164 / 166

页数：3