THE EFFECT OF PARTICLE-SIZE AND VOLUME FRACTION ON THE AGING BEHAVIOR OF A LIQUID-PHASE SINTERED SIC/ALUMINUM COMPOSITE

被引：58

作者：

JANOWSKI, GM ^{[1
]}

PLETKA, BJ ^{[1
]}

机构：

[1] UNIV ALABAMA,DEPT MAT SCI & ENGN,BIRMINGHAM,AL 35294

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1995年 / 26卷 / 11期

关键词：

D O I：

10.1007/BF02669659

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The aging response of a SiC particulate reinforced powder metallurgy aluminum composite was examined as a function of particle size and volume fraction. The addition of SiC particles ranging in size from 24 to 142 mu m at 9 vol pet had no effect on the aging kinetics of the composites. Acceleration of the aging behavior or inhibition of the initial stage of the age-hardening process was observed at 18 and 27 vol pet. The accelerated aging kinetics were consistent with smaller particles creating larger thermal misfit dislocation densities. In addition, it was shown that different combinations of ceramic particle size and volume fraction lead to similar effects on the aging behavior. Loss of the initial hardening response was attributed to the suppression of Guinier-Preston (GP) zone formation due to the annihilation of excess vacancies at the thermal misfit dislocations.

引用

页码：3027 / 3035

页数：9

共 25 条

[1] MICROSTRUCTURE OF FIBER AND PARTICULATE SIC IN 6061-AL COMPOSITES [J].