Metastable phases in Gallium-Indium eutectic alloy particles and their size dependence

被引：9
作者：
Chen, Xiao Meng
Fei, Guang Tao [1 ]
Li, Xing Feng
Zheng, Kang
Zhang, Li De
机构：
[1] Chinese Acad Sci, Key Lab Mat Phys, Hefei 230031, Peoples R China
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2010年 / 71卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Alloys; Crystal growth; Differential scanning calorimetry (DSC); Crystal structure; Phase transitions; NUCLEATION; SELECTION; MELTS; SOLIDIFICATION; GA;
D O I：
10.1016/j.jpcs.2010.03.049
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this paper, submicrometer-sized Ga-In eutectic alloy particles were dispersed into polymethylmethacrylate (PMMA) matrix by ultrasonic vibration and sedimentation method. The solidification and melting processes of Ga-In eutectic alloy particles were studied by differential scanning calorimeter (DSC). Four endothermal peaks with the onset temperature located at 16, -11, -22, and -27 degrees C were observed in DSC heating curves, which corresponded to the melting process of the stable Ga-In phase alpha-Ga(In) and three metastable phases of beta-Ga(In), delta-Ga(In) and gamma-Ga(In), respectively. The stable phase alpha-Ga(In) can only be formed when the size of alloy particle was larger than 0.58 mu m. Conversely, metastable phases beta-Ga(In), delta-Ga(In) and gamma-Ga(In) are mainly formed. The result shows that phase structures in Ga-In eutectic alloy are size dependent. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：918 / 921
页数：4
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