机器关节用APS制备MoS2/Ag基涂层的组织和摩擦性能分析  

Synthesis and Triboligical Behavior of Ag-Doped MoS Coatings for Robot Joint

作　　者：王基月 张晓莹[1] 刘德平[2] Wang Jiyue;Zhang Xiaoying;Liu Debing(School of Mechanical Engineering,Zhengzhou University of Science and Technology,Zhengzhou 450000,Cna;School of Mechanical Engineering,Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]郑州科技学院机械工程学院,郑州450000 [2]郑州大学机械工程学院,郑州450000

出　　处：《真空科学与技术学报》2020年第8期741-744,共4页Chinese Journal of Vacuum Science and Technology

基　　金：河南省科技厅项目(项目号:182102210553);河南省教育厅项目(项目号:18B460019)。

摘　　要：为了提高机器关节用APS制备MoS2涂层的耐摩擦性能,通过添加Ag颗粒的方式得到MoS2/Ag基涂层。实验测试的方式研究了不同Ag添加量对涂层微观组织和摩擦性能的影响。研究结果表明:涂层都形成了致密组织结构,只在部分区域产生了尺寸较小的微孔。涂层和基底之间形成了紧密结合的界面,并未观察到裂纹与孔隙结构。Ag粉能够与MoS2组织形成良好的复合沉积状态。当提高温度后,涂层发生了摩擦因数减小;当Ag加入量提高后,涂层发生了摩擦系数减小。随着温度提高,添加Ag能够使涂层磨损率获得显著减小。提高Ag加入量后,形成了更光滑的磨损表面,20%Ag涂层形成了最平整磨痕组织。Raman光谱形成了Ag2MoO4吸收峰,受到高温作用较易发生断裂,表现出良好高温润滑特性。The Ag-doped MoS2 coatings on 1 Cr18 Ni9 Ti stainless steel,a good robot-joint material,were synthesized by atmospheric plasma spraying(APS).The influence of the Ag-content on the microstructures and tribological properties was investigated with X-ray diffraction,energy dispersive spectroscopy,scanning electron microscopy,Raman spectroscopy and mechanical probes.The results show that the Ag-doping had a major impact.For instance,Ag-doping increased the compactness,enhanced the interfacial adhesion and decreased pore-size and micro-crack density;Ag and MoS2 powders easily formed tight clusters at high temperatures.As the Ag-content increased,the friction coefficient significantly decreased,from 0.76 to 0.46 at 20℃ and from 0.32 to 0.13 at 800℃,respectively,accompanied by a considerable decrease of wear-rate.The fact that thermal and/or friction heat possibly induce formation and decomposition of laminar Ag2MoO4 and surface segregation of Ag-atoms explains the good lubrication and smooth wear-tracks.

关 键 词：大气等离子喷涂 MOS2 AG 微观组织 摩擦性能 

分 类 号：TG115[金属学及工艺—物理冶金]