喷射电沉积Ni-Al_2O_3纳米复合镀层的组织及性能  

Structure and Properties of Jet Electrodeposited Ni-Al_2O_3 Nanocomposite Coatings

作　　者：陈劲松[1] 黄因慧[2] 田宗军[2] 刘志东[2] 贺毅强[1] 

机构地区：[1]淮海工学院,江苏连云港222005 [2]南京航空航天大学,江苏南京210016

出　　处：《材料科学与工程学报》2010年第6期912-915,929,共5页Journal of Materials Science and Engineering

基　　金：淮海工学院自然科学基金项目(Z2009003);淮海工学院人才引进启动基金资助江苏省高校自然科学研究资助项目(09KJD430001)

摘　　要：利用喷射电沉积工艺制备了Ni-Al2O3纳米复合镀层,分析了纳米Al2O3颗粒添加量、阴极电流密度以及电解液喷射速度对复合镀层中纳米颗粒含量的影响,采用扫描电镜(SEM)以及X-射线衍射仪对复合镀层的微观形貌进行了分析,研究了复合镀层中纳米颗粒含量对其显微硬度、结合强度、耐腐蚀性的影响。结果表明,镍沉积层具有纳米晶微观结构,平均晶粒尺寸约为50nm;纳米Al2O3颗粒在沉积层中的含量可达12.2at%;随Al2O3含量的提高,镀层显微硬度逐渐提高,结合强度和耐腐蚀性先提高后有所降低。Ni-Al_2O_3 nanocomposite coatings were fabricated by jet electrodeposition process.Effects of concentration of Al_2O_（3） in the electrolyte,current density and jet velocity of electrolyte on the content of nano-Al_2O_3 were analyzed.The microstructure of composite coatings was characterized by scanning microscopy（SEM） and X-ray diffractometry（XRD）.Effects of nano-Al_2O_3 content on the microhardness,bond strength and corrosion resistance were evaluated.The results show that the deposited Ni layers are nanocrystalline with an average grain size of 50nm.Al_2O_3 particles are well dispersed in the layer and the particle content is up to 12.2at%.Microhardness of the coatings increases,but bond strength and corrosion resistance of the coatings first increase and then decrease with increasing the content of Al_2O_3 in the coatings.

关 键 词：喷射电沉积 纳米复合镀层 显微硬度 结合强度 

分 类 号：TG153[金属学及工艺—热处理]