Preparation and tribological performances of Ni-P-multi-walled carbon nanotubes composite coatings  

Ni-P-多壁碳纳米管复合镀层的制备及摩擦磨损性能(英文)

作　　者：孟振强[1] 李溪滨[1] 熊拥军[1] 湛菁[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第11期2719-2725,共7页中国有色金属学报（英文版）

基　　金：Project (JPPT-115-5-1759) supported by the National Defense Science and Technology Industry Committee of China; Project (20090162120080) supported by Research Fund for the Doctoral Program of Higher Education of China;Project (2010FJ3012) supported by the Program of Science and Technology of Hunan Province, China

摘　　要：Multi-walled carbon nanotubes （MWNTs） were wet-milled in the presence of ammonia and cationic surfactant and then used as reinforcements to prepare Ni-P-MWNTs composite coatings by electroless plating. The tribological performances of the composite coatings under dry condition were investigated in comparison with 45 steel and conventional Ni-P coating, Micrographs show that short MWNTs with uniform length and open tips were obtained through the wet-milling process. The results of wear test reveal that the Ni-P-MWNTs composite coatings posses much better friction reduction and anti-wear performances when compared with 45 steel and Ni-P coating. Within the MWNTs content range of 0.74%-1.97%, the friction coefficient and the volume wear rate of the composite coatings decrease gradually and reach the minimum values of 0.08 and 6.22x10-15 m3/（N.m）, respectively. The excellent tribological performances of the composite coatings can be attributed to the introduction of MWNTs, which play both roles of reinforcements and solid lubricant during the wear process.采用湿式球磨对多壁碳纳米管（MWNTs）预处理，通过化学镀制备Ni-P-MWNTs复合镀层；对45钢、传统Ni-P镀层和Ni-P-MWNTs复合镀层在干摩擦条件下的摩擦磨损性能进行考察和比较。结果表明，球磨后MWNTs长径比降低，长度均匀，且多数端部处于敞开状态。与45钢和Ni-P镀层相比，Ni-P-MWNTs复合镀层的减摩耐磨能力显著强化。当复合镀层中MWNTs的质量分数为0.74%~1.97%时，其摩擦因数和磨损率随MWNTs含量的增加而减少；对于MWNTs质量分数为1.97%的复合镀层，其摩擦因数和磨损率仅为0.08和6.22×10-15 m3/（N？m）。复合镀层优良的摩擦磨损性能归因于MWNTs优异的力学性能和自润滑特性。

关 键 词：Ni-P coating carbon nanotubes composite coating ball milling electroless plating SELF-LUBRICATION tribologicalperformance friction coefficient volume wear rate 

分 类 号：TG174.44[金属学及工艺—金属表面处理]