Kinetics of the α-β Phase Transformation in Seeded Si3N4 Ceramics

被引：21
|
作者：
Bucevac, D. [1 ]
Boskovic, S. [1 ]
Matovic, B. [1 ]
机构：
[1] Inst Nucl Sci Vinca, Belgrade 11001, Serbia
来源：
SCIENCE OF SINTERING | 2008年 / 40卷 / 03期
关键词：
Seeded Si3N4; Phase Transition; Hot-Pressing;
D O I：
10.2298/SOS0803263B
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The alpha-beta phase transformation in Si3N4 was studied for seeded samples using all Y2O3-Al2O3 mixture as a sintering aid. The concentration of beta-seeds varied from 0 to 5 wt.%. The results showed that alpha-beta phase transformation followed the first-order reaction. The calculated activation energy for seeded samples was in the range from 348 to 3 78 KJ/mol, indicating boundary reaction as the rate limiting step.
引用
收藏
页码：263 / 270
页数：8
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