Effect of rare earths on mechanical properties and microstructures of Si3N4-based ceramics

被引：0
|
作者：
Mu, BC
Li, M
You, XQ
Liu, BY
Gu, ZG
Liu, DW
机构：
来源：
JOURNAL OF RARE EARTHS | 2000年 / 18卷 / 01期
关键词：
rare earths; Si3N4; mechanical property; microstructure;
D O I：
暂无
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The effects of Y2O3, La2O3 and Nd2O3 on the mechanical properties and microstructures of Si3N4-based 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 flexural strength of Si3N4 added with both Y2O3 and La2O3 are 7.8 MPa.m(1/2) 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 beta-Si3N4 grain.
引用
收藏
页码：27 / 29
页数：3
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