%0 Journal Article
%T Microstructures Of Rapidly Solidified Cu--Fe Immiscible Alloy<br>快速凝固Cu-Fe难混溶合金的显微组织
%A HE Jie
%A ZHAO Jiuzhou
%A <br>何杰
%A 赵九洲
%J 金属学报
%D 2005
%I 
%X 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.
%K Cu-Fe alloy
%K metastable miscibility gap
%K liquid-liquid phase transformation
%K microstructure<br>Cu—Fe合金
%K 亚稳液态组元不混溶区
%K 液-液相变
%K 显微组织
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=51CE5E4129D2D681&yid=2DD7160C83D0ACED&vid=2001E0D53B7B80EC&iid=E158A972A605785F&sid=8CCD0401CC9AE432&eid=FED44C0135DC1D9C&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=20