采用真空熔炼方法制备了不同Ce含量的Sn?58Bi合金，对其显微组织、熔化特性和润湿性等进行了分析，重点研究了稀土Ce对Sn?58Bi与Cu基板焊点剪切强度的影响. 结果表明，Ce能细化Sn?58Bi合金的共晶组织，而对合金的熔点、熔程影响较小. Ce添加量增加，合金的润湿性降低，Ce添加量为0.1wt%时，Sn?58Bi/Cu焊点剪切强度最佳，达15 MPa.
Sn?58Bi alloys with different Ce contents were fabricated by vacuum smelting and casting. The microstructure, phase composition and properties of the alloys were investigated. The influence of Ce on shear strength of Sn?58Bi/Cu solder joints was emphasized. The results showed that the Sn?58Bi eutectic microstructure were refined, and the melting point and melting range were less affected by Ce addition. The wettability of Sn?58Bi alloys reduced when the Ce content increased, the shear strength was maximum when the content of Ce was 0.1wt%.
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