研究微量稀土元素对Sn57Bil Ag无铅焊料合金显微组织以及性能的影响.结果表明,当稀土含量为0.05％ ～0.5％(质量分数)时,对该无铅焊料合金的导电性和腐蚀性影响不大,但使熔化区间温度降低；可以提高焊料合金的力学性能,提高焊料的铺展面积,细化组织.比较Ce、Er、Y三种稀土元素对焊料合金的影响,发现Er元素可以更好地提高焊料合金的综合性能,Ce次之.
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