盐雾环境下MoS_(2)/WB_(2)超晶格薄膜的摩擦学性能及耐腐蚀性  

Tribological Properties and Corrosion Resistance of MoS_(2)/WB_(2) Superlattice Structure Films in Salt Spray Environment

作　　者：高臻荣 李金龙 任思明 GAO Zhenrong;LI Jinlong;REN Siming(Key Laboratory of Marine Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;Collage of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]中国科学院宁波材料技术与工程研究所海洋关键材料重点实验室,宁波315201 [2]浙江工业大学材料科学与工程学院,杭州310014

出　　处：《中国表面工程》2024年第6期311-323,共13页China Surface Engineering

基　　金：国家自然科学基金(52375220)。

摘　　要：二硫化钼(MoS_(2))薄膜因其独特的结构特征,层间易滑移,作为固体润滑剂在航空航天、核能、机械电子等领域已得到广泛应用。然而,MoS_(2)对环服役境极其敏感,易在大气、高温等条件下发生氧化,导致其摩擦学性能下降,寿命大幅缩短。为了提高并改善MoS_(2)薄膜的环境适应性,采用非平衡磁控溅射技术成功制备MoS_(2)/WB_(2)纳米复合和超晶格结构薄膜。研究发现,WB_(2)的引入可以促使MoS_(2)沿(002)晶面择优生长,获得的薄膜表面光滑、结构致密;相比于复合结构,MoS_(2)/WB_(2)超晶格薄膜具有更高的硬度(~7.9GPa)和硬/弹比(0.097)。得益于MoS_(2)(002)晶面沿基底方向的平行排布和纳米多层界面的构筑,MoS_(2)/WB_(2)超晶格薄膜展现出优异的中性盐雾耐腐蚀性能;特别地,超晶格薄膜在盐雾腐蚀试验前后均保持较低的摩擦因数和磨损率,而复合薄膜经历盐雾腐蚀后摩擦性能大幅衰减。这与超晶格薄膜高的硬/弹比和优异的耐腐蚀性能密切相关,有助于对偶球表面形成连续且致密的摩擦转移膜。Molybdenum disulfide (MoS_(2)) has been extensively utilized as a solid lubricant in various high-performance industries,including aerospace,nuclear energy,mechanical engineering,and electronics,owing to its exceptional lubricating properties that arise from its unique layered structure that facilitates easy shear between basal planes.However,a major challenge for MoS_(2) thin films is their inherent sensitivity to environmental conditions,particularly exposure to atmospheric moisture,salt fog,and high temperatures,which can cause oxidation.This oxidation compromises tribological performance and significantly reduces the service life of the films,and thereby,limiting their applicability in harsh environments.To address these limitations,the development of MoS_(2)-based films with enhanced environmental stability is a key research topic.In this study,we successfully synthesized MoS_(2)/WB_(2) nanocomposite and MoS_(2)/WB_(2) superlattice films using unbalanced magnetron sputtering,a versatile and effective thin-film deposition technique.The primary objective was to enhance the environmental adaptability and mechanical properties of MoS_(2) films while maintaining their low-friction characteristics.The experimental findings revealed that the introduction of WB_2 not only promoted the preferential growth of MoS_(2) along the (002) crystal plane,but also resulted in the formation of films with smooth surfaces and dense microstructures.These structural enhancements are crucial for improving the environmental stability and tribological performance of the MoS_(2) films.Notably,the MoS_(2)/WB_(2) superlattice film exhibited superior mechanical properties when compared with its nanocomposite counterpart,with a hardness of approximately 7.9 GPa and a high H/E ratio of 0.097.These properties are primarily attributed to the abundant MoS_(2) (002) planes aligned parallel to the substrate and nano-multilayer interfaces within the superlattice structure,which collectively contribute to the enhanced resistance of the film to env

关 键 词：MoS_(2)/WB_(2)超晶格薄膜 盐雾环境 耐腐蚀性能 摩擦学性能 

分 类 号：TH117[机械工程—机械设计及理论] TB37[一般工业技术—材料科学与工程]