Effect of Rare Earths on Mechanical Properties and Microstructures of Si3N4-based Ceramics

被引：0
|
作者：
穆柏春
李明
由向群
刘秉余
谷志刚
刘大玮
机构：
来源：
Journal of Rare Earths | 2000年 / 01期
关键词：
rare earths; Si3N4; mechanical property; microstructure;
D O I：
暂无
中图分类号：
TQ174.1 [基础理论];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of Y2O3d, La2O3 and Nd2O3 on the mechanical properties and microstructures of Si3N4-hased ceramics were studied. It shows that a significant improvement in mechanical properties can be obtained by adding rare earths oxides in Si3N4. The fracture toughness and the fie-cural strength of Si3N4 added with both Y2O3 and La2O3 are 7. 8 MPa.m1/2 and 962 MPa, respectively. The main reason is that adding rare earths in Si3N4 can improve the microstructure of the material and increase the aspect ratio of β-Si3N4 grain.
引用
收藏
页码：27 / 29
页数：3
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