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材料工程  2008 

Sn-Ag-Cu-Ce钎料润湿性能及焊点力学性能研究

, PP. 5-8

Keywords: 无铅钎料,润湿性能,力学性能

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Abstract:

基于润湿平衡原理研究了微量稀土元素Ce对Sn-Ag-Cu-Ce无铅钎料在Cu基板上润湿性能的影响规律,研究了Sn-Ag-Cu-Ce焊点的力学性能及断口形貌.结果表明,随着稀土Ce含量的增加,钎料在Cu基板上的润湿时间逐渐缩短,润湿角逐渐减小,当Ce的质量分数在0.03%~0.05%时,Sn-Ag-Cu-Ce钎料的润湿性能较好.且当Ce的含量为0.03%左右时,Sn-Ag-Cu-Ce焊点的力学性能达到最佳值,焊点断口呈现均匀的韧窝形貌,断裂方式以韧性断裂为主.

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