Ni-La_2O_3纳米复合镀层制备工艺研究  

Electrodeposition Process of Ni-La_2O_3 Nanocomposite Coating

作　　者：薛玉君[1] 朱荻[1] 赵飞[1] 

机构地区：[1]南京航空航天大学机电工程学院,江苏南京210016

出　　处：《机械工程材料》2004年第8期42-45,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(50075040);中国博士后科学基金资助项目(2002032192)

摘　　要：将La2O3纳米颗粒添加到氨基磺酸镍镀液中采用电沉积方法制备Ni-La2O3纳米复合镀层,研究了多种因素对复合镀层中La2O3含量的影响,分析了复合镀层的表面形貌和显微硬度。结果表明:试验条件下最佳工艺为电流密度2A/dm2、镀液温度50℃、搅拌速度800r/min、镀液中La2O3含量30g/L;与纯镍镀层相比,复合镀层表面平整光滑、组织致密均匀;其显微硬度也高于纯镍镀层,并随着复合镀层中La2O3含量的增加而升高。Ni-La2O3 nanocomposite coatings were deposited from a suspension of La2O3 nanoparticles in nickel sulfamate bath. The effects of many factors on the La2 O3 content in the composite coatings were studied. The surface morphology of the nanocomposite coating was analyzed by using a field emission scanning electron microscope (FEG-SEM). Microhardness of the Ni-La2O3 nanocomposite coatings was also evaluated. As the results, the optimum process parameters obtained from this experiment were as following: current density 2A/dm2, electrolyte temperature 50℃ , stirring speed 800r/min, La2O3 concentration 30g/L. Compared to pure Ni coating, the Ni-La2O3 nanocomposite coating has a more smooth surface, with a compact and uniform microstructure. In addition, the nanocomposite coating exhibits higher microhardness than that of pure Ni coating. The microhardness of the nanocomposite coating increases with the La2O3 content in the composite coating.

关 键 词：LA2O3 纳米颗粒 纳米复合镀层 电沉积 

分 类 号：TG153.2[金属学及工艺—热处理]