PHASE-TRANSFORMATION AND MICROSTRUCTURAL CHANGES OF SI3N4 DURING SINTERING

被引：46

作者：

GOTO, Y

THOMAS, G

机构：

[1] LAWRENCE BERKELEY LAB,NATL CTR ELECTRON MICROSCOPY,BERKELEY,CA 94720

[2] UNIV CALIF BERKELEY,DEPT MAT SCI,BERKELEY,CA 94720

来源：

JOURNAL OF MATERIALS SCIENCE | 1995年 / 30卷 / 09期

关键词：

D O I：

10.1007/BF01184561

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Changes of density, the alpha-beta phase transformation, and composition of grains and grain boundaries during sintering of Si3N4 with various sintering conditions using additives of Y2O3 and Al2O3 were investigated. The phase determination of individual Si3N4 grains was performed by convergent beam electron diffraction. The relations between densification and transformation were divided into two groups, depending on the additive compositions. Aluminium dissolution into Si3N4 grains occurred mostly during alpha-beta transformation process. The concentrations of aluminium and oxygen in the grain boundaries decreased as the alpha-beta transformation progressed.

引用

页码：2194 / 2200

页数：7

共 14 条

[1]

BAKER AR, 1987, MATER DESIGN, V8, P315

[2] GRAIN-BOUNDARY-PHASE CRYSTALLIZATION AND STRENGTH OF SILICON-NITRIDE SINTERED WITH A YSIALON GLASS [J].