STRENGTHENING MECHANISM IN AL2O3/SIC PARTICULATE COMPOSITES

被引：0

作者：

OTSUKA, J ^{[1
]}

IIO, S ^{[1
]}

TAJIMA, Y ^{[1
]}

WATANABE, M ^{[1
]}

TANAKA, K ^{[1
]}

机构：

[1] NAGOYA UNIV,FAC ENGN,DEPT MECH ENGN,CHIKUSA KU,NAGOYA,AICHI 46401,JAPAN

来源：

NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI-JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 1994年 / 102卷 / 01期

关键词：

ALUMINA; SILICON CARBIDE; COMPOSITE; STRENGTH; MICROSTRUCTURE; RESIDUAL STRESS;

D O I：

暂无

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：

Effects of sub-grain-boundaries (SGB) formed in Al2O3 grains and residual stress caused by additions of SiC particles in Al2O3 phase on the strength of Al2O3/SiC composites were investigated, The number of the SGB and the residual tensile stress in Al2O3 were found to increase with increasing SiC content. The experimental. results suggest that the strengthening in Al2O3/SiC composites is attributable not only to the formation of the SGB but also to the toughness increases which is possibly related with the residual stress. The strengthening by annealing in Ar was also investigated. The annealing resulted in the strength increase of more than 200 MPa, whereas the annealed and subsequently ground specimens did not show the strength increase. It is therefore concluded that the strengthening due to the anneal is mainly caused by healing of surface defects.

引用

页码：29 / 34

页数：6

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