Novel morphology and solidification behavior of eutectic bismuth-tin (Bi-Sn) nanowires

被引:12
作者
Chen, Shih Hsun [2 ]
Chen, Chien Chon [1 ]
Chao, Chuen Guang [2 ]
机构
[1] Natl United Univ, Dept Energy & Resources, Miaoli 36003, Taiwan
[2] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30050, Taiwan
关键词
Bi-Sn nanowires; Eutectic; AAO; Stoichiometry; Solidification; FABRICATION; MICROSTRUCTURE; SOLDER; GOLD;
D O I
10.1016/j.jallcom.2009.03.107
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In the present work we show a simple and robust fabrication process for dense and continuous bismuth-tin (Bi-Sn) eutectic nanowires. The Bi-Sn eutectic nanowires of 200 nm diameter and several tens of mu m, in length were fabricated by a vacuum hydraulic force method. The alloy melt was injected into an anodic aluminum oxide (AAO) template to form nanowires after melt solidification. For this process, nanowires were formed from non-atomic deposition with liquid alloy; in this way, the composition of nanowires can be controlled precisely in stoichiometry. The Bi-Sn melt was restricted inside the AAO which has a low thermo-conduction and long period cooling rate around the melt. On the other hand, the heat flow is along the tube Z-axis and the melt is solidified from the AAO bottom to top because of the open pore on the AAO top. The eutectic nanowires were found to be dense and continuous with a uniform diameter throughout the length of the wires and with a lamellar microstructure along the wires' Z-axis. In addition, the alternative segmental compositions showed that the ratio of tin to bismuth is approximately 33:1. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:270 / 273
页数:4
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