含污染物油润滑条件下n-Al_2O_3/Ni复合电刷镀层的摩擦学性能研究  

Study on the Tribological Properties of Electro-Brush Plated Nano-Al_2O_3/Ni Composite Coating under the Lubrication of Oil Containing Abrasive Contaminant

作　　者：杜令忠[1] 徐滨士[2] 董世运[2] 杨华[2] 吴毅雄[1] 

机构地区：[1]上海交通大学材料科学与工程学院,上海210030 [2]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《摩擦学学报》2004年第5期392-396,共5页Tribology

基　　金：国家自然科学基金资助重点项目(50235030);国家973计划资助项目(G1999065009);2002年中英政府科技合作资助项目(2002M3).

摘　　要：采用电刷镀技术制备了n-Al2O3/Ni复合镀层,在T-11型球-盘式摩擦磨损试验机上对比考察了快速镍镀层及纳米复合刷镀层在含污染物油润滑条件下的摩擦学性能.结果表明,由于纳米颗粒的强化作用,n-Al2O3/Ni复合镀层的硬度及含污染物油润滑条件下的耐磨性比快速镍镀层分别提高了60%和30%,其磨损机理在低载下以磨粒磨损为主,在高载下以粘着磨损为主.Ni-based composite coating doped with nano-Al2O3 particulates was prepared making use of electro-brush plating. The tribological properties of the resulting composite coating sliding against Si3N4 under the lubrication of 50 cc oil for diesel engine containing SiO2 and A12O3 contaminant were comparatively investigated on a T-11 ball-on-disk friction and wear tester, using quick speed nickel coating as the reference. The worn surface morphologies of the quick speed nickel coating and composite coating were observed on a scanning electron microscope, while the morphological features of the wear debris in the residue lubricating oil were analyzed by means of ferrograph. It was found that the composite coating doped with Al2O3 particulates had much higher hardness and better wear resistance than the quick speed nickel coating, which was attributed to the fine-particle strengthening and dispersive strengthening functions of the nano particulates. The composite coating was dominated by abrasive wear as it slid against the ceramic counterpart at a relatively smaller load, while it was mainly characterized by adhesion wear at a relatively higher load.

关 键 词：电刷镀 纳米颗粒 镍基复合镀层 污染物 油润滑 摩擦学性能 

分 类 号：TG174.40[金属学及工艺—金属表面处理] TH117.3[金属学及工艺—金属学]