HOT ISOSTATIC PRESSING OF ALPHA-SILICON CARBIDE CERAMICS

被引：19

作者：

SHE, JH

GUO, JK

JIANG, DL

机构：

[1] Shanghai Institute of Ceramics, Academia Sinica, Shanghai, 200050

来源：

CERAMICS INTERNATIONAL | 1993年 / 19卷 / 05期

关键词：

D O I：

10.1016/0272-8842(93)90048-V

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：

A submicron alpha-SiC powder was densified by hot isostatic pressing using a Vycor glass container. The effect of different additives such as B4C, AlN and Al2O3 on densification, mechanical properties and oxidation behaviour was investigated. The results showed that the densification mechanism was attributed to liquid-phase sintering via the formation of a eutectic between SiO2 and additive, and Al2O3 was confirmed to be an effective additive for hot isostatic pressing of SiC. Hot isostatically pressed, Al2O3-doped SiC had an ultrafine-grained microstructure with grain size varying from 0.5 to 2.5 mu m, and exhibited a flexural strength above 570 MPa and a fracture toughness higher than 5.17 MPa m(1/2).

引用

页码：347 / 351

页数：5

共 20 条

[1] STABLE AND METASTABLE EQUILIBRIA IN SYSTEM SIO2-AL2O3 [J].