The liquid phase separation of Bi-Ga hypermonotectic alloy under acoustic levitation condition

被引：13
|
作者：
Hong ZhenYu [1 ]
Lu YongJun [1 ]
Xie WenJun [1 ]
Wei BingBo [1 ]
机构：
[1] Northwestern Polytech Univ, Dept Appl Phys, Xian 710072, Peoples R China
来源：
CHINESE SCIENCE BULLETIN | 2007年 / 52卷 / 11期
基金：
中国国家自然科学基金;
关键词：
acoustic levitation; hypermonotectic alloy; liquid phase separation; Stokes motion;
D O I：
10.1007/s11434-007-0231-z
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Containerless treatment of Bi-58.5at%Ga hypermonotectic alloy is successfully performed with acoustic levitation technique. Under acoustic levitation condition, the second phase (Ga) distributes almost homogeneously in solidification sample, opposite to macrosegregation in solidification sample under conventional condition. Stokes motion of the second liquid droplet (Ga) is significantly restrained under acoustic levitation condition. The analyses indicate that the melt vibration in the gravity direction forced by acoustic field can induce steady flow around the second liquid droplet, which influences droplet shape during its moving upward and consequently restrains Stokes motion velocity of the second liquid droplet.
引用
收藏
页码：1446 / 1450
页数：5
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