Sn-8.8Zn-x Bi合金在烧结NdFeB上的润湿过程及界面反应行为  

Wetting Process and Interfacial Reaction Behavior of Sn-8.8Zn-x Bi Alloys on Sintered NdFeB

作　　者：周俊宏 王容岳 袁章福 ZHOU Junhong;WANG Rongyue;YUAN Zhangfu(Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学钢铁共性技术协同创新中心,北京100083

出　　处：《有色金属（冶炼部分）》2024年第7期109-115,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(U1738101,51974022)。

摘　　要：采用座滴法研究了在Ar-5%H_(2)气氛中Sn-8.8Zn-x Bi合金在NdFeB基体上的润湿性和润湿界面形貌。结果表明,Sn-8.8Zn-x Bi合金在NdFeB基板上润湿过程分为两个阶段:以范德华力和扩散力为驱动力的非反应性润湿阶段及由界面反应产物和反应产物的吸附作用影响的反应性润湿阶段。Sn-8.8Zn-x Bi合金中随着Bi含量提高,合金的润湿性得到改善,相同加热条件下润湿时间缩短,其中Sn-8.8Zn-7Bi在NdFeB基板表面接触角为120.11°。Sn-8.8Zn-x Bi合金在NdFeB基板上的润湿类型为反应性润湿,反应产物为ζ-FeZn_(13)相。ζ-FeZn_(13)相提高了Sn-8.8Zn-x Bi合金在NdFeB表面的黏结强度,证明Sn-8.8Zn-x Bi合金可作为NdFeB表面焊料。The wettability and wetting interface morphology of Sn-8.8Zn-x Bi alloy on NdFeB substrate in Ar-5%H_(2) atmosphere were investigated by the seated drop method.The results show that the wetting process of Sn-8.8Zn-x Bi alloy on NdFeB substrate is divided into two stages:a non-reactive wetting stage driven by van der Waals and diffusion forces,and a reactive wetting stage influenced by the interfacial reaction products and the adsorption of the reaction products.The wettability of Sn-8.8Zn-x Bi alloy is improved with the increase of Bi content,and the wetting time is shortened under the same heating condition,in which the contact angle of Sn-8.8Zn-7Bi alloy on the surface of NdFeB substrate is 120.11°.The wetting type of the Sn-8.8Zn-x Bi alloy on the NdFeB substrate is the reactive wetting,and the reaction product isζ-FeZn_(13) phase.ζ-FeZn_(13) phase improves the bond strength of Sn-8.8Zn-x Bi alloy on the NdFeB surface,which proves that Sn-8.8Zn-x Bi alloy can be used as NdFeB surface solder.

关 键 词：润湿性 NDFEB Sn-8.8Zn-x Bi合金 界面行为 

分 类 号：TG146.1[一般工业技术—材料科学与工程]