Fabrication of 15R AlN-polytypoid ceramics

被引：16

作者：

Wang, PL ^{[1
]}

Jia, YX ^{[1
]}

Sun, WY ^{[1
]}

机构：

[1] Acad Sinica, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

MATERIALS LETTERS | 1999年 / 41卷 / 02期

基金：

中国国家自然科学基金;

关键词：

sialon; AlN-polytypoids; 15R AlN-polytypoid; rare-earth oxides; densification; formation; mechanical properties;

D O I：

10.1016/S0167-577X(99)00107-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The formation, densification behaviors and mechanical properties of 15R AlN-polytypoid (SiAl6O2N6) were studied. The results show that 12H(SiAl5O2N5) occurs as a second phase during the formation of 15R. The additives Sm2O3 or Nd2O3, especially combined with Al2O3, can effectively promote the densification of 15R. Both the highest hardness of 12.80 GPa and fracture toughness of 4.8 MPa m(1/2) occur in the 15R composition with 2.5 wt.% SmAlO3 as sintering additive. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：78 / 82

页数：5

共 11 条

[1] STRUCTURE AND COMPOSITION ANALYSIS OF SILICON ALUMINUM OXYNITRIDE POLYTYPES BY COMBINED USE OF STRUCTURE IMAGING AND MICROANALYSIS [J].