MoS_(2)-TiCr/C涂层在大气及海水环境中的摩擦学行为研究  

Tribological Behavior of MoS_(2)-TiCr/C Coating in Atmospheric and Seawater Environment

作　　者：杨秀杰 陆乾江 周钊元 唐正强[1] YANG Xiujie;LU Qianjiang;ZHOU Zhaoyuan;TANG Zhengqiang(School of Mechanical Engineering,Guizhou University,Guizhou Guiyang 550025,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025

出　　处：《摩擦学学报(中英文)》2025年第2期300-314,共15页Tribology

基　　金：国家自然科学基金地区项目(52165022);贵州省科技计划项目(黔科合支撑[2021]一般281)资助.

摘　　要：为了寻求MoS_(2)基涂层在海洋环境中应用的可能性,通过磁控溅射制备了纯MoS_(2)、MoS_(2)-TiCr和MoS_(2)-TiCrC涂层.系统地表征了各涂层的化学组成、相结构、微观形貌和机械性能.详细评估了各涂层在大气环境和人工模拟海水环境中的摩擦磨损行为.结果表明:对MoS_(2)进行Ti、Cr和C元素的掺杂降低了涂层的结晶程度,增加了涂层的致密性、硬度和弹性模量.在大气环境中,MoS_(2)-TiCr涂层的摩擦系数(0.0834)和磨损率[0.75×10^(−6)mm^(3)/(N·m)]均最低.在海水环境中,由于海水润滑的主导作用,纯MoS_(2)、MoS_(2)-TiCr和MoS_(2)-TiCrC涂层的摩擦系数几乎一致(≈0.063),但MoS_(2)-TiCrC涂层的磨损率最低[0.27×10^(−6)mm^(3)/(N·m)].在海水腐蚀和机械磨损的共同作用下,Ti和Cr含量较高的MoS_(2)-TiCr涂层存在明显的剥落腐蚀行为,因此其磨损率较高[2.94×10^(−6)mm^(3)/(N·m)].MoS_(2)has excellent lubrication performance resulting from its interlayer shear properties,so it often serves as a solid lubricant in various industrial fields.It is particularly useful for mechanical equipment components such as bearings,gears,and bolts.Unfortunately,the outstanding lubrication performance of MoS_(2)is easily affected by H_(2)O and O_(2),which makes MoS_(2)solid lubrication coating typically present a short service life in high humidity and aerobic environments.Doping MoS_(2)with elements is a reliable and promising method to improve the compactness of the microstructure,mechanical properties,friction,and wear performance of MoS_(2)-based composite coating.At present,a large number of studies have focused on exploring the friction and wear behavior of MoS_(2)-based composite coatings in a vacuum,inert gas,or atmospheric environments,with few studies reporting the friction and wear behavior of MoS_(2)-based composite coatings in the marine environment.To explore the possibility of the application of MoS_(2)-based coatings in marine environments,pure MoS_(2),MoS_(2)-TiCr,and MoS_(2)-TiCrC coatings were deposited on the surface of a titanium alloy(Ti-6Al-4V)using a non-equilibrium magnetron sputtering system.Electron probe microscopy(EPMA),XRD,Raman spectroscopy,SEM,and nanoindentation were carried out to systematically characterize the chemical composition,phase structure,microstructure,and mechanical properties of the coatings.The friction and wear behavior of the coatings in atmospheric and artificially simulated seawater environments were evaluated in detail using a ball-onplate tribometer.The research results revealed that doping with Ti,Cr,and C elements in MoS_(2)changed the crystal structure of MoS_(2)from long-range order to short-range order or disorder(grain refinement),reduced the crystallinity of the composite coatings,and increased the microstructure density,hardness,and elastic modulus of the composite coatings.In the atmospheric environment,both the friction coefficient(0.0834)and

关 键 词：磁控溅射 MoS_(2)-TiCrC涂层 海水腐蚀 摩擦磨损 

分 类 号：TH117.2[机械工程—机械设计及理论]