Microstructures of rapidly solidified Cu-Fe immiscible alloy

被引：0

作者：

He, J ^{[1
]}

Zhao, JH ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

ACTA METALLURGICA SINICA | 2005年 / 41卷 / 04期

关键词：

Cu-Fe alloy; metastable miscibility gap; liquid-liquid phase transformation; microstructure;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Fine powders of the Cu-Fe alloy were manufactured by using the high-pressure gas atomization technique. The study of the powder microstructures indicated that the size and concentration of the atomized-droplets play important roles in the microstructure evolution. A smaller atomized-droplet has a finer dispersed microstructure. Alloys with composition close to the critical composition of the alloy system are relatively easy to be undercooled into the miscibility gap. The formation of Fe-poor layer on the surface of powder is mainly caused by two reasons. One is the Fe-rich droplets' Marangoni migration towards the center of the atomized-droplet due to the radial temperature gradient, and the other is the repulsive effect of the advancing solid/liquid interface on the Fe-rich droplets.

引用

页码：407 / 410

页数：4

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