活性元素Al对超声波钎焊Mo接头组织和力学性能的影响规律  

Effect of Active Element Al on Microstructure and Mechanical Properties of Ultrasonic Soldered Mo Joints

作　　者：薛海涛[1] 魏鑫 郭卫兵 张新宇[1] XUE Haitao;WEI Xin;GUO Weibing;ZHANG Xinyu(School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学材料科学与工程学院,天津300130

出　　处：《材料导报》2020年第20期20103-20106,共4页Materials Reports

基　　金：河北省高等学校科学技术研究项目-青年基金项目(QN2019028);河北省自然科学基金(E2019202407)。

摘　　要：为了解决太空飞行器用太阳能电池Mo互连片表面Ag镀层因原子氧侵蚀导致的寿命短问题,本工作采用低温Sn基钎料,通过添加活性元素Al和施加超声的复合活化方法,在大气环境、300℃、无钎剂的条件下钎焊纯Mo。重点研究了Sn基钎料中Al含量对超声波钎焊Mo接头微观组织、界面处元素分布以及接头力学性能的影响。结果表明,当钎料中不含Al元素时,界面结合强度低,接头断裂在界面处。随着钎料中Al含量的增加,界面处Al元素的聚集增多,界面化合物由Al 5Mo转变为Al 12 Mo,接头剪切强度逐渐增加,当Al含量为10%时,接头的剪切强度达到33.36 MPa,接头断裂在钎缝中。In order to solve the problem of short service life of Ag-coated Mo interconnects for solar cell of spacecraft due to atomic oxygen erosion,pure Mo was soldered with low temperature Sn-based solder under atmospheric environment,300℃and without flux by adding active Al element and applying ultrasonic activation soldering method.The effect of Al content in Sn-based solders on the microstructure,element distribution at interface and mechanical properties of ultrasonic soldered Mo joints was studied.The results showed that the interfacial bonding strength was low and the joint fractured from the interface without Al element in the filler metal.With the increase of Al content in the filler metal,the segregation of Al element at the interface increases,the interfacial compound changes from Al 5Mo to Al 12 Mo,and the shear strength of the joint increases gra-dually.When the Al content was 10%,the shear strength of the joint reached 33.36 MPa,and the joint fractured from the soldering seam.

关 键 词：钼 超声波钎焊 Al活化 组织 力学性能 

分 类 号：TG425[金属学及工艺—焊接] TG454