EFFECT OF DELTA-ALUMINA FIBERS ON THE AGING CHARACTERISTICS OF 2024-BASED METAL-MATRIX COMPOSITES

被引：33

作者：

CHEN, KC

CHAO, CG

机构：

[1] Institute of Materials Science and Engineering, National Chaio Tung University, 30049, Hsinchu

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1995年 / 26卷 / 05期

关键词：

D O I：

10.1007/BF02670599

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The age-hardening precipitation reaction in aluminum matrix composites reinforced with discontinuous alumina fibers was studied using the differential scanning calorimetry (DSC) technique, microhardness tests, and transmission electron microscopy (TEM) observation. Composites fabricated with the 2024 alloy matrix were infiltrated through a ceramic preform using a squeeze-casting process. The alumina fibers had a considerable effect on the aging response of the matrix alloy in composites. Alumina fibers caused suppression of Guinier-Preston (GP) zone formation in composite that reduced the peak hardening during artificial aging. The suppression of GP zone formation in composites is believed to be due to the fiber-matrix interface, which acts as a sink for vacancies during quenching. Moreover, the presence of reinforcement does not alter the kinetics of the subsequent artificial aging of these Al2O3/2024Al composites.

引用

页码：1035 / 1043

页数：9

共 15 条

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