一种制备纳米复合镀层的新方法  

A Novel Method for Fabricating Nanocomposite Coatings

作　　者：冯秋元[1] 李廷举[1] 张小立[1] 滕海涛[1] 金俊泽[1] 

机构地区：[1]大连理工大学 三束材料改性国家重点实验室,辽宁大连116024

出　　处：《稀有金属材料与工程》2007年第A03期715-718,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50234020;50474055)

摘　　要：研究了一种制备纳米复合镀层的新方法——在直流电镀过程中对电镀液施加强磁场以代替机械搅拌来制备Ni/Al_2O_3纳米复合镀层,考察了镀层的结构,并对镀层性能进行了研究。结果表明,在强磁场下可以制得纳米复合镀层;与未加磁场的纯镍镀层相比,施加磁场后镀层的晶体结构发生了择优取向;当磁场强度为8T时,复合镀层的磨损率仅为纯镍镀层的25%,其耐蚀性与Q235钢相比提高56.3%,与纯镍镀层相比提高46.8%。强磁场对电镀液起到较好的搅拌作用,通过影响镀层中纳米微粒的含量,使镀层结构发生变化,进而影响镀层的性能。A novel method for fabricating nanocomposite coatings was investigated —— a high magnetic field was imposed on plating bath instead of mechanical stirring for preparation nanocomposite coatings in direct current electroplating process. The microstructure of coatings was characterized, and the properties of coatings were investigated. The results show that it is feasible to prepare nanocomposite coatings in the presence of high magnetic field. The crystal structure of composite coating occur preferred orientation as compared to that of pure nickel coating in the absence of magnetic field; when the magnetic field strength is up to 8 T, the wear rate of composite coating is only quarter than that of pure nickel coating, its corrosion resistance increases by 56.3% and 46.8% in comparison with Q235 steel and pure nickel coating, respectively. The high magnetic field gives rise to excellent agitation effect of plating bath, and makes the microstructure of composite coatings to change by affecting the amount of nanoparticles in it, then influences the properties of coatings.

关 键 词：强磁场 纳米复合镀层 新方法 磨损率 耐蚀性 

分 类 号：TQ153[化学工程—电化学工业]