Friction and Wear Characteristics of Brush Plating Ni/nano-Al2O3 Composite Coating under Sand-Containing Oil  

作　　者：LingzhongDU BinshiXU ShiyunDONG XinLI HuaYang WeiyiTU ZixinZHU 

机构地区：[1]CollegeofMaterialsScienceandEngineering,ShanghaiJiaoTongUniversity,Shanghai200030,China [2]NationalKeyLaboratoryforRemanufacturing,AcademyofArmoredForceEngineering,Beijing100072,China

出　　处：《Journal of Materials Science & Technology》2005年第1期100-104,共5页材料科学技术（英文版）

基　　金：This research was financially supported by the Major Project of National Natural Science Foundation of China(No.50235030);the National 973 Planning Project(No.G1999065009);the Science and Technology Cooperation Project between China and Poland Governments in 2002(No.2002M3);their supports are gratefully acknowledged.

摘　　要：Ni-matrix composite coating containing AI2O3 nano-particles is prepared by brush plating. The effects of the nano-particles on the microstructure, microhardness and tribological properties of the composite coating under the lubrication of a diesel oil containing sand are investigated. The results show that the microstructure of the composite coating is finer than that of the pure nickel coating due to the codeposition of the nano-particles. When the nano-particle concentration in the electroplating bath reaches 20 g/L, the microhardness, and wear resistance of the composite coating is as much as 1.6 times and 1.3-2.5 times of those of the pure nickel coating respectively. The main hardening mechanism of the composite coating is superfine crystal grain strengthening and dispersion strengthening. The composite coating is characterized by scuffing as it slides against Si3N4 under the present test conditions.Ni-matrix composite coating containing AI2O3 nano-particles is prepared by brush plating. The effects of the nano-particles on the microstructure, microhardness and tribological properties of the composite coating under the lubrication of a diesel oil containing sand are investigated. The results show that the microstructure of the composite coating is finer than that of the pure nickel coating due to the codeposition of the nano-particles. When the nano-particle concentration in the electroplating bath reaches 20 g/L, the microhardness, and wear resistance of the composite coating is as much as 1.6 times and 1.3-2.5 times of those of the pure nickel coating respectively. The main hardening mechanism of the composite coating is superfine crystal grain strengthening and dispersion strengthening. The composite coating is characterized by scuffing as it slides against Si3N4 under the present test conditions.

关 键 词：Brush plating Ni-matrix composite coating Friction and wear characteristics Oil lubrication 

分 类 号：TG174.44[金属学及工艺—金属表面处理]