SINTERING OF BETA-SI3N4 POWDER MADE BY THE IMIDE-DECOMPOSITION METHOD

被引：7

作者：

HIROSAKI, N

OKAMOTO, Y

AKIMUNE, Y

YAMADA, T

MITOMO, M

机构：

[1] UBE IND LTD, UBE, YAMAGUCHI 755, JAPAN

[2] NATL INST RES INORGAN MAT, TSUKUBA, IBARAKI 305, JAPAN

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 1995年 / 103卷 / 09期

关键词：

BETA-SI3N4; MICROSTRUCTURE; IMIDE-DECOMPOSITION; STRENGTH; FRACTURE TOUGHNESS;

D O I：

10.2109/jcersj.103.977

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：

Beta-Si3N4 powder made by the imide-decomposition method was gas-pressure sintered at 1800 degrees C for 4h in 1 MPa N-2 gas. This material had a microstructure of ''in-situ composite'' and excellent mechanical properties (strength : 780 MPa, fracture toughness : 7.5 MPa . m(1/2)), whereas beta-Si3N4 powder made by the silicon nitridation method required sintering temperatures higher than 1900 degrees C to attain similar microstructure and mechanical properties. beta-Si3N4 powder by the imide-decomposition method had excellent properties for grain growth at low temperatures.

引用

页码：977 / 978

页数：2