Effect of indium addition on the microstructural formation and soldered interfaces of Sn-2.5Bi-1Zn-0.3Ag lead-free solder

被引：0
|
作者：
Ming-jie Dong
Zhi-ming Gao
Yong-chang Liu
Xun Wang
Li-ming Yu
机构：
[1] Tianjin University,School of Materials Science & Engineering, Tianjin Key Laboratory of Advanced Jointing Technology
来源：
International Journal of Minerals, Metallurgy, and Materials | 2012年 / 19卷
关键词：
soldering alloys; indium; microstructure; interfaces; melting point; intermetallics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The microstructural formation and properties of Sn-2.5Bi−xIn-1Zn-0.3Ag (in wt%) alloys and the evolution of soldered interfaces on a Cu substrate were investigated. Apart from the relatively low melting point (about 195°C), which is close to that of conventional eutectic Sn-Pb solder, the investigated solder presents superior wettability, solderability, and ductility. The refined equiaxial grains enhance the mechanical properties, and the embedded bulk intermetallic compounds (IMCs) (Cu6Sn5 and Cu5Zn8) and granular Bi particles improve the joint reliability. The addition of In reduces the solubility of Zn in the β-Sn matrix and strongly influences the separation and growth behaviors of the IMCs. The soldered interface of Sn-2.5Bi-xIn-1Zn-0.3Ag/Cu consists of Cu-Zn and Cu-Sn IMC layers.
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页码：1029 / 1035
页数：6
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