范玉春,张柯柯,陈伟明,吴金娜,张超

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心
• 3:洛阳职业技术学院机电工程学院

摘要(Abstract)：

采用机械混合法制备了不同Ni含量的Ni纳米颗粒增强Sn58Bi复合钎料，研究了复合钎料及复合钎料/Cu微焊点的组织与性能。结果表明：添加适量Ni纳米颗粒可细化复合钎料的显微组织，减缓Bi相偏聚粗化；Sn58Bi-0.5Ni复合钎料润湿性较基体钎料提升37.8%;Sn58Bi-0.75Ni复合钎料的拉伸强度、伸长率分别较基体钎料提高15.5%、21.8%。复合钎料和Cu基板可实现良好焊接，微焊点界面金属间化合物(IMC)组织由Cu_6Sn_5转变为(Cu, Ni)_6Sn_5,Sn58Bi-0.75Ni/Cu微焊点剪切强度较基体钎料提高17.9%。随Ni纳米颗粒添加量增加，微焊点剪切断裂途径由IMC层向钎焊界面近钎缝侧移动，断裂机制由以解理+少量二次裂纹的脆性断裂转变为以准解理为主的脆-韧混合断裂。

关键词(KeyWords)： Ni纳米颗粒;Sn58Bi复合钎料;金属间化合物;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1604132);; 中原基础研究领军人才(ZYYCYU202012130);; 河南省国际科技合作项目(重点项目)(241111521400);; 河南省科技攻关项目(242102230048)

作者(Author): 范玉春,张柯柯,陈伟明,吴金娜,张超

DOI: 10.13289/j.issn.1009-6264.2024-0223

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