ON THE SOLIDIFICATION OF AL62CU20CO15SI3 AND AL61CU19.5CO14.5SI5 ALLOYS

被引：25
|
作者：
GRUSHKO, B
WITTMANN, R
URBAN, K
机构：
[1] Institut fur Festkorperforschung, Forschungszentrum Jülich GmbH, D-W5170 Jülich
来源：
JOURNAL OF MATERIALS RESEARCH | 1992年 / 7卷 / 10期
关键词：
D O I：
10.1557/JMR.1992.2713
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The solidification behavior of Al62Cu20Co15Si3 and Al61Cu19.5Co14.5Si5 alloys was studied by means of optical metallography, scanning and transmission electron microscopy, energy-dispersive x-ray analysis, powder x-ray diffraction, and differential thermal analysis. Slowly as well as rapidly cooled ingots of both alloys contained a decagonal quasicrystalline phase as the dominant phase with, additionally, several minor crystalline phases. The structure of the rapidly solidified Si-containing alloys was similar to that of the ternary Al65Cu20Co15 alloy. In the slowly solidified alloys the substitution of 3 at. % Al by Si did not change the basic phase constitution. Si was only partially incorporated in the decagonal phase and a significant quantity of Si was found in elemental form. The increase of Si concentration to 5 at. % resulted in the appearance of new minor phases.
引用
收藏
页码：2713 / 2723
页数：11
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