微量添加In对Ag-Sn合金粉末氧化机理的影响  

Effects of Minor In Addition on Oxidation Mechanism of Ag-Sn Alloy Powders

作　　者：李波[1,2] 刘心宇[1] 黄锡文[2] 叶凡[2] 张小文[1] 张琪[1] 陈光明[2] 

机构地区：[1]桂林电子科技大学,广西桂林541004 [2]桂林电器科学研究院有限公司,广西桂林541004

出　　处：《稀有金属材料与工程》2014年第8期1964-1968,共5页Rare Metal Materials and Engineering

基　　金：广西千亿元产业重大科技攻关工程项目(桂科攻11107003-16)

摘　　要：采用雾化法分别制备了Ag-9.5Sn和Ag-7.6Sn-0.87In合金粉末,使用热重分析仪研究了相关合金在900℃氧化动力学曲线;并分析了合金粉末氧化前后的粉末颗粒形貌及表面成分。结果表明:Ag-7.6Sn-0.87In合金粉末氧化时,其快速氧化增重过程分为两阶段,且第1阶段快速增重速率比第2阶段快;微量添加In能促进第1段快速氧化增重,In与Sn氧化后形成一层均匀致密的氧化膜阻碍了第2阶段快速氧化增重。Abstract： Ag-9.5Sn （wt/%） and Ag-7.6Sn-0.87In （wt/%） alloy powders were synthesized by atomization. Oxidation kinetics curves of Ag-Sn-In alloy powder, Ag-Sn alloy powder, pure Sn powder and pure Indium powder were obtained by thermo gravimetric analyzer （TGA）. The particle size, surface morphology and surface composition of Ag-Sn-In alloy powders before and after oxidation were investigated. The results show that rapid oxidation mass gain process of Ag-Sn-In alloy powders is divided into two periods, and the former is faster than the latter. Minor In addition could promote rapid oxidation mass gain of the first period. Uniform dense oxide film is formed after In and Sn being oxidized, which hinders the second period of rapid oxidation mass gain process.

关 键 词：电触头材料 Ag-Sn-In合金粉末 雾化法 氧化机理 银氧化锡 

分 类 号：TM503.5[电气工程—电器]