化学置换法制备核-壳结构(Cu-Sn)/Fe复合粉末  

Core-shell structured (Cu-Sn)/Fe composite powder produced by chemical replacement

作　　者：周文艳[1] 胡竞之[1] 赵文[1] 黄啸[1] 彭俊[1] 李松林[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2010年第5期495-499,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家科技支撑计划资助项目(2009BAE74B01);粉末冶金国家重点实验室创新基金资助项目(200902);国家大学生创新实验计划项目(081053387)

摘　　要：与氰化物镀Cu-Sn合金及电镀Cu-Sn合金相比,化学法制备Cu-Sn包覆层具有环境污染小,能耗低的特点。在含有硫酸铜、氯化亚锡、硫酸、表面活性剂、络合剂及稳定剂等成分的溶液中,通过置换反应在铁粉表面包覆一层Cu-Sn合金,研究包覆层的形貌和主要成分以及添加剂的适宜浓度范围。结果表明,在含有15-20 g/L CuSO4.5H2O,35-40 g/L SnCl2.2H2O,22-30 g/L EDTANa2.2H2O,8 g/L聚乙二醇,2.5 g/L对苯二酚,0.3 mol/L H2SO4的溶液中,获得的（Cu-Sn）/Fe复合粉末表面为金黄色,包覆层厚约2μm,Sn的质量分数为7%-8%,Cu-Sn合金均匀连续地包覆在铁粉表面。Chemical replacement demands less energy and brings less environmental pollution comparing to cyanide plating Cu-Sn alloy and electroplating Cu-Sn alloy.Therefore,the chemical replacement was taken to plate a layer of Cu-Sn alloy on iron powder via replacement reaction in a solution consisting of copper sulphate,stannous chloride,vitriol,surface active agents,complexing agent and stabilizer;and the effects of the main compositions of the plating layer and concentrations of the additives on the coating process were studied.The results show that the（Cu-Sn）/Fe composite powder,gotten from a solution consists of 15-20 g/L CuSO4.5H2O,35-40 g/L SnCl2.2H2O,22-30 g/L EDTANa2.2H2O,8 g/L polyethylene glycol,2.5 g/L p-dihydroxybenzene,0.3 mol/L H2SO4,is in golden-like color with a coating of 2 μm in thickness.And the Cu-Sn alloy covers the surface of the iron powder evenly and continuously.

关 键 词：化学置换法 核-壳结构 (Cu-Sn)/Fe复合粉末 

分 类 号：TF123[冶金工程—粉末冶金]