光亮微晶态镍铁合金箔电沉积  

Electrodeposition of bright minicrystal nickel-iron alloy foil

作　　者：杨余芳[1] 龚竹青[1] 阳征会[1] 罗北平[1] 马玉天[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2005年第6期977-982,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(59674025)

摘　　要：在氯化物-硫酸盐体系中, 采用电沉积的方法制得了光亮Ni-Fe二元合金箔. 研究了Ni2+与Fe2+的摩尔比(n(Ni2+)/n(Fe2+))及Cl-、硼酸、柠檬酸、糖精和十二烷基硫酸钠对电沉积Ni-Fe合金箔的铁含量和电流效率的影响规律. 当电流密度为10～13 A/dm2, pH值为3.17, 温度为50～55 ℃, 时间为10 min时, 得到了Fe含量(质量分数)为23.2%～63.0%, Ni含量为37.0%～76.8%, 厚度为30 μm左右的纳米微晶态Ni-Fe合金箔镀层. X射线衍射结果表明: 合金箔为NiFe固溶体织构, 晶粒细化, 属于纳米微晶体;合金箔表面光亮平滑;显微硬度(HR30T)为17.2～19.5, 抗拉强度为779.66 Mpa, 延伸率为1%, 电阻率为29.56～62.99 μΩ·cm, 其具有较强的韧性和耐腐蚀性能.The bright nickel- iron binary alloy foil was synthesized successfully by means of electrodeposition in the system of chloride-sulfate. The influences of n（Ni^2＋ ）/n（Fe^2＋ ）, Cl^- ion, boric acid, citric acid, saccharin and sodium lauryl sulfate on Fe content of the plating nickel- iron alloy foil with the current efficiency were investigated. When current density was 10 - 13 A/dm^2 , pH value was 3.17, temperature was 50 - 55 ℃ and plating time was 10 min, nano minicrystal nickel - iron alloy foils were obtained with the thickness of about 30μm and iron, nickel contents of 23.2%- 63.0% and 37.0%- 76.8% （mass fraction） ,respectively. The X-ray diffraction result indicates that the Ni-Fe alloy foil represents a strongly textured solid solution of Fc in Ni. The crystal grain of the alloy foil is fine and belongs to nano minicrystal, and the surface is bright and smooth. The hardness （HR30T） of Ni-Fe alloy foil is 17. 2 - 19. 5. The tensile strength is 779.66 MPa while the extensibility is 1%,and the resistivity is from 29.56 to 62.99 μΩ·cm. The Ni-Fe alloy foil has good toughness and corrosion resistance.

关 键 词：镍铁 合金箔 电沉积 纳米 微晶态 添加剂 

分 类 号：TG174.441[金属学及工艺—金属表面处理]