摘要
为了探究MXenes及其纳米复合涂层的摩擦学行为,以硅片(单晶硅)为基底,分别制备了Ti_(3)C_(2)-MXenes涂层、Ti_(3)C_(2)-MXenes/纳米金刚石复合涂层以及Ti_(3)C_(2)-MXenes/石墨烯复合涂层,测定了硅基底、MXenes及其纳米复合涂层与多种材质轴承球对磨的摩擦系数,并采用光学显微镜、三维白光干涉扫描仪和Raman光谱法对球斑及磨痕的表面形貌及组成进行了表征。结果表明:在所测试的不同材质摩擦球中,在循环次数为1200下硅基底与聚四氟乙烯(PTFE)球对磨时的摩擦系数最低,硅基底表面的磨痕边缘处有明显的沟壑,其磨损机理以磨粒磨损和黏着磨损为主,聚合物球表面的磨损机理以磨粒磨损和疲劳磨损为主;当硅基表面的Ti_(3)C_(2)-MXenes涂层与PTFE球对磨时,PTFE球的自润滑作用使得在1 N载荷下MXenes涂层的摩擦系数稳定在0.14,磨痕表面有明显的PTFE转移层;在1 N载荷下,与PTFE球对磨的Ti_(3)C_(2)-MXenes/纳米金刚石复合涂层的摩擦系数稳定在0.15;在0.5 N载荷下,与PTFE球对磨的Ti_(3)C_(2)-MXenes/石墨烯复合涂层的摩擦系数稳定在0.18,与未加入石墨烯时相比,硅基表面的聚合物转移层减少。
To investigate the friction behavior of MXenes and their nano⁃composite coatings,Ti_(3)C_(2)-MXenes coat⁃ings,Ti_(3)C_(2)-MXenes/nano⁃diamond composite coatings,and Ti_(3)C_(2)-MXenes/graphene composite coatings have been prepared on silicon wafer(monocrystalline silicon)substrates.The friction coefficients between the silicon substrate,MXenes,and their nano⁃composite coatings and ball bearings made of different materials were measured.The surface morphology and composition of the wear spots and abrasion marks were characterized using optical mi⁃croscopy,three⁃dimensional white⁃light interference scanning,and Raman spectroscopy.The results showed that the friction coefficient between the silicon substrate and a polytetrafluoroethylene(PTFE)ball is the lowest after 1200 rubbing cycles.The silicon substrate surface exhibits clear grooves at the edges of the abrasion marks,indi⁃cating that the dominant wear mechanisms are abrasive and adhesive wear.For the polymer ball,the dominant wear mechanisms are abrasive wear and fatigue wear.When the Ti_(3)C_(2)-MXenes coating on the silicon surface is rubbed against the PTFE ball,the self⁃lubricating action of PTFE stabilizes the friction coefficient of the MXenes coating at 0.14 under a 1 N load,and there is a noticeable transfer layer of PTFE on the surface of the wear mark.Under a 1 N load,the friction coefficient of the Ti_(3)C_(2)-MXenes/nano⁃diamond composite coating rubbed against the PTFE ball remains stable at 0.15,while under a 0.5 N load,the friction coefficient of the Ti_(3)C_(2)-MXenes/graphene com⁃posite coating remains stable at 0.18.Incorporation of graphene results in a reduced transfer layer of the polymer on the silicon surface.
作者
庞皓升
刘大猛
柴春鹏
尹绚
PANG HaoSheng;LIU DaMeng;CHAI ChunPeng;YIN Xuan(Chinese Aeronautical Establishment,Beijing 100012;State Key Laboratory of Tribology in Advanced Equipment,Department of Mechanical Engineering,Tsinghua University,Beijing 100084;School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081;College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第6期74-84,共11页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金(51905295)
清华大学高端装备界面科学与技术全国重点实验室开放基金(SKLTKF21B09)
辽宁省航发材料摩擦学重点实验室开放基金(LKLAMTF202304)。
