建筑用不锈钢表面磁场作用下脉冲电沉积MoS2涂层的组织和摩擦学性能

Microstructure and Friction Performance of MoS2 Coatings Prepared by Pulse Electrodeposition with Magnetic Field on Stainless Steel Surface for Architecture

为了提高建筑装饰用不锈钢表面的耐磨性能,分别以无磁场的脉冲电沉积以及平行与垂直磁场下的脉冲电沉积工艺制得了MoS2涂层,并对不同工艺状态下的涂层组织结构与各项性能参数进行了测试。结果表明:涂层在相邻晶粒间产生许多尺寸较小的MoS2颗粒;施加垂直磁场所得涂层晶粒细小,形成致密结构;在平行磁场制得许多晶胞类型的MoS2涂层,表面也较为平整;磁场并不会使涂层微观结构发生变化,但会引起Ni晶粒出现择优取向;施加磁场时形成的涂层硬度增加;施加平行磁场时形成的涂层的结合力最高,未施加磁场的结合力最低;平行磁场下涂层达到最小的磨损程度和摩擦系数,表现出优异的耐磨性,表明磁场可以显著提高涂层的平整度;各状态下形成的MoS2涂层表现出相近的磨损形貌特征,基本都表现为磨粒磨损的特点。

In order to improve the wear resistance of the surface of stainless steel for architecture decoration,the MoS2 coatings were prepared by pulse electrodeposition process without magnetic field,with parallel or vertical magnetic field,respectively.The structure and properties of coatings obtained under different technological conditions were tested.Results showed that the coating produced many smaller MoS2 particles between adjacent grains,and the coating prepared in vertical magnetic field had fine grain and compact structure.Many cell-type MoS2 coatings were prepared in parallel magnetic field,and the coating surface was also relatively flat.Moreover,the magnetic field would not change the microstructure of the coating,but cause the Ni grain to appear preferential orientation.The hardness of the coating increased when the magnetic field was applied.The binding force of the coating formed by applying parallel magnetic field was the highest,while that of the coating formed by applying no magnetic field was the lowest.Under the parallel magnetic field,the coating reached the minimum wear degree and friction coefficient,presenting excellent wear resistance,and it could be obtained that the magnetic field could significantly improve the flatness of the coating.Furthermore,the MoS2 coating formed under different conditions showed similar wear morphology,and all of them exhibited the characteristics of abrasive wear.