The properties of Sn-9Zn lead-free solder alloys doped with trace rare earth elements |
| |
Authors: | C M L Wu D Q Yu C M T Law L Wang |
| |
Affiliation: | (1) Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR;(2) Department of Materials Engineering, Dalian University of Technology, Dalian, People’s Republic of China |
| |
Abstract: | The Sn-Zn alloys have been considered as lead-free solders. It is well known that their poor properties of wetting and oxidation
resistance are the main problems to prevent them from becoming commercially viable solders. In this paper, trace rare earth
(RE) elements of mainly Ce and La have been used as alloying elements into the Sn-9Zn alloy. The results indicated that with
the RE addition the originally coarse β-Sn grains in the microstructure of the alloy were refined. The tensile strength significantly
increased with only a slight decrease in ductility. The surface tension was decreased, resulting in great improvement in wetting
properties with rosin-based active flux. |
| |
Keywords: | Sn-9Zn lead-free solder Ce and La rare earth elements tensile strength 0 2% proof stress elongation solderability rosin-based active flux |
本文献已被 SpringerLink 等数据库收录! |