Variations in processing, microstructure and properties of Al/Al2O3 composites fabricated by displacement reaction

被引：2

作者：

Yoshikawa, N ^{[1
]}

Funahashi, S ^{[1
]}

Kikuchi, A ^{[1
]}

Taniguchi, S ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch, Sch Met, Div Engn,Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

INTERNATIONAL JOURNAL OF MATERIALS & PRODUCT TECHNOLOGY | 2001年 / 16卷 / 1-3期

关键词：

aluminum; alumina; displacement reaction; reactive infiltration; mechanical properties; aluminum copper alloy; aging;

D O I：

10.1504/IJMPT.2001.005392

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to supply variations in mechanical properties to Al/Al2O3 composites by displacement reaction between SiO2 and molten Al, two processes was attempted to fabricate the modified composites. The first process was to infiltrate Al melt into a partially sintered SiO2 preform and Al/Al2O3 composites were obtained. Molten Al infiltrated into some pores in the preform, which formed thick Al channels in the composite bodies. The mechanical property changed from dutile to brittle, depending on the thickness of these Al channels, which was related to the sintering temperature of SiO2 preforms. Al-Cu/Al2O3 composites were fabricated by reaction between molten Al-Cu alloy and SiO2. The hardness increased 1.5 times by aging the specimens. Fine precipitates were observed in Al parts in the composite bodies. Their mechanical properties were discussed in relation with the microstructures.

引用

页码：32 / 39

页数：8