镍包覆碳纳米管增强Sn-58Bi复合钎料焊点的组织和力学性能研究  

Study on Microstructure and Mechanical Properties of Nickel-coated Carbon Nanotubes Strengthening Sn-58Bi Composite Solder Joint

作　　者：周仕远 杨莉[1] 张尧成[1] 王国强 石小龙 ZHOU Shiyuan1,2, YANG Li1, ZHANG Yaocheng1, WANG Guoqiang2, SHI Xiaolong1(1. School of Mechanical Engineering, Changshu Institute of Technology, Changshu 215500, China; 2. School of Mechanical and Electrical Engineering, Soochow University, Suzhou 215500, Chin)

机构地区：[1]常熟理工学院机械工程学院,江苏常熟215500 [2]苏州大学机电工程学院,江苏苏州215500

出　　处：《热加工工艺》2018年第5期81-83,87,共4页Hot Working Technology

摘　　要：研究了镍包覆碳纳米管（Ni-CNTs）对Sn-58Bi钎料焊点微观组织和可靠性的影响。结果表明：Ni-CNTs的添加提高了Sn-58Bi钎料润湿性能,复合钎料焊点界面IMC（intermetallic compound）呈现扇贝状,细化了Sn-58Bi钎料的微观组织,提高了复合钎料接头的拉伸和剪切性能。随着Ni-CNTs含量的增加,铺展面积呈现先上升后下降的趋势,IMC厚度呈现下降的趋势;复合钎料接头的抗拉强度和抗剪强度均呈现先上升后下降的趋势。当Ni-CNTs含量为0.03wt%时,复合钎料铺展面积最大,为58.3 mm^2;复合钎料接头的抗拉强度和抗剪强度最大,分别为99.2、14.1 MPa。The effects of nickel-coated carbon nanotubes （Ni-CNTs） on the microstructure and reliability of Sn-58Bi solder joint were studied. The results show that after adding Ni-CNTs, the wettability of Sn-58Bi solder is improved, the intermetaUic compound （IMC） at the interface of the composite solder joint shows scallop, the microstructure of Sn-58Bi solder is refined and the tensile and shear properties of the joint are improved. With the increase of Ni-CNTs content, the spreading area increases firstly and then decreases, the IMC thickness decreases, and the tensile strength and shear strength of the composite solder joint increase firstly and then decrease. When the Ni-CNTs content is 0.03 wt%, the spreading area of the composite solders is the largest, which is 58.3 mm2, and the tensile strength and shear strength of the joint are the highest, which are 99.2, 14.1 MPa respectively.

关 键 词：镍包覆的碳纳米管 Sn-58Bi 微观组织 可靠性 

分 类 号：TG454[金属学及工艺—焊接]