电沉积工艺参数对铁-钴合金箔组成与结构的影响

Effects of electrodeposition conditions on composition and structure of iron-cobalt alloy foils

研究了电流密度、温度和pH等工艺条件对钛板上电镀Fe-Co合金箔组成、阴极电流效率、表面形貌和微观结构的影响。电解液配方为:FeSO4·7H2O40g/L,CoSO4·7H2O30g/L,CoCl2·6H2O10g/L,硼酸30g/L,柠檬酸三钠40g/L,抗坏血酸10g/L,糖精1g/L,十二烷基硫酸钠0.1g/L。最佳工艺条件为:电流密度4A/dm2,温度50°C,pH1.5。Fe-Co合金箔为铁钴置换固溶体和面心立方晶体结构,表现出强烈的(111)织构择优取向,结构致密,晶粒细小、均匀,并由尺寸更小的亚晶粒紧密团聚组成。合金箔表面平整,无裂纹和孔洞。

The effects of process conditions such as current density,temperature and pH on the composition,cathodic current efficiency,surface morphology and microstructure were studied for Fe-Co alloy foil electroplated on Ti sheet.The bath formulation is as follows：FeSO4·7H2O 40 g/L,CoSO4·7H2O 30 g/L,CoCl2·6H2O 10 g/L,boric acid 30 g/L,trisodium citrate 40 g/L,ascorbic acid 10 g/L,saccharin 1 g/L and sodium dodecyl sulfate 0.1 g/L.The optimal conditions are temperature 50 °C,pH 1.5,and current density 4 A/dm2.The Fe-Co alloy foils are Fe-Co substituted solid solution and face-centered cubic structure with a preferential （111） orientation.The Fe-Co alloy foils have the features of smooth surface,no crack and cavity,compact structure,fine and uniform grain.In addition,the foils are compared of agglomerated small sub-grain.