Ga、Al对Sn-Zn钎料耐蚀及高温抗氧化性能的影响  

Effects of Ga and Al Additions on Corrosion Resistance and High-Temperature Oxidation Resistance of Sn-9Zn Lead-Free Solder

作　　者：王慧[1] 薛松柏[1] 陈文学[1] 马秀萍[1] 

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《稀有金属材料与工程》2009年第12期2187-2190,共4页Rare Metal Materials and Engineering

摘　　要：采用侵蚀失重法研究Ga、Al对Sn-9Zn钎料在3.5%NaCl水溶液中耐腐蚀性的影响。结果表明,添加Ga元素后,腐蚀产物的粘附性提高,均匀覆盖在钎料表面上,提高了钎料的耐蚀性能;添加Al以后,Zn和Al被选择性腐蚀,腐蚀随着Al含量的增加而加剧。采用热重分析(TGA)和俄歇电子能谱(AES)研究Ga、Al对Sn-9Zn钎料高温抗氧化性的影响。结果表明,Ga可在钎料表面形成一层集肤层;Al可在钎料表面形成一层致密的氧化膜,两者均可阻挡空气中的氧向钎料内部扩散,从而大大改善钎料的高温抗氧化性。Effects of Ga and Al additions on the corrosion resistance of Sn-9Zn lead free solder in 3.5% NaCI solution were researched by erosion mass loss evaluation. Effects of the additions on high-temperature oxidation resistance of the solder were investigated by TGA and AES. Results indicate that the corrosion resistance of Sn-Zn solders is improved by addition of Ga, for the corrosion products exhibit better adhesiveness on the solder surface after adding Ga; however, with Al addition, the corrosion resistance deteriorates for the selective erosion of Al and Zn. The TGA results show that the high-temperature oxidation resistance of Sn-9Zn solder is observably improved by adding Ga or AI; the AES analysis shows that Ga could form a protective skin on the solder surface, while Al can form a dense protective oxidation layer, both of which can hinder diffusion of the oxygen to the inner.

关 键 词：GA AL Sn—Zn 无铅钎料 耐腐蚀性 高温抗氧化性 

分 类 号：TG425[金属学及工艺—焊接]