含氢碳膜/掺银二硫化物异质界面超高压超滑  

Ultra-high pressure superlubricity enabled by a hydrogenated carbon film/Ag-doped transition metal disulfide heterogeneous interface

作　　者：田基森 邓雯丽 陈新春 马丽然[1] TIAN Jisen;DENG Wenli;CHEN Xinchun;MA Liran(State Key Laboratory of Tribology in Advanced Equipment,Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学机械工程系,高端装备界面科学与技术全国重点实验室,北京100084

出　　处：《清华大学学报(自然科学版)》2025年第2期404-412,共9页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金青年基金项目(52405203);国家自然科学基金优秀青年基金项目(52222506);北京市自然科学基金项目(3234057,3222010)。

摘　　要：近年来随着国家对火星和金星等相关星系深空探测战略的实施,开发特殊环境如CO_(2)气氛中的重载超滑技术具有重要的研究意义。该文以高硬度低含氢碳膜和低硬度纳米银掺杂改性二硫化物薄膜构成的异质界面摩擦副为研究对象,探究该体系的力学特性、纳米结构和摩擦学行为。重点分析了在0~3.2 GPa宽载荷域内GLCH/WS_(2)-Ag和SUJ2/WS_(2)-Ag润滑系统的宏观超滑行为及影响因素。基于接触界面摩擦层的表面形貌与纳米结构表征,揭示了滑动区域应力诱导类石墨烯纳米转移膜和WS_(2)剪切层的形成规律,阐释了接触界面原位形成的多相有序化摩擦膜对润滑系统超高压超滑构筑的作用机理。[Objective]Superlubricity is a state of motion characterized by near-zero friction and negligible wear on tribo-affected materials.It represents a groundbreaking technological approach to mitigating friction-induced material degradation and mechanical equipment failure.From a surface engineering perspective,achieving superlubricity relies heavily on the design and development of both bulk and surface tribo-materials.Solid superlubricity can be achieved under specific conditions,such as ultra-high vacuum or dry inert gaseous environments,and offers distinct advantages,including the ability to sustain high normal loads and extreme temperatures.Diamond-like carbon and layered materials such as molybdenum disulfide can achieve superlubricity through their inherent surface characteristics.However,in the practical operating conditions of mechanical components,the complex and often harsh contact environments present significant challenges for a simple,homogeneous lubricant to sustain exceptional lubricity.Heterogeneous systems composed of at least two types of lubricants offer a promising solution.[Methods]This research investigates a heterogeneous tribo-interface composed of hard hydrogenated carbon films and nanocrystalline-doped transition metal disulfides.The hard hydrogenated carbon films were synthesized by an ion beam deposition system using hydrocarbon gaseous sources as processed precursor.Specific molecular structure such as aromatic-ring species like methylbenzene(C7H8)was chosen for tuning the superior property and surface passivation capacity in the film.The correlation between the sp2/sp3 ratio and hydrogen content in the carbon matrix can be controlled by the pulse-biased ion energy.The silver-doped MoS2 or WS_(2) films were prepared by the ion beam assisted magnetron sputtering method.Multilayered structures were established by alternatively depositing each individual layers using different modes.Afterwards,the study focuses on characterizing the mechanical properties,nanostructures,and tribological beha

关 键 词：碳膜 二硫化物 异质界面 重载 超滑 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]