在甘油润滑下TiAlN涂层的超低摩擦和磨损特性  

Ultralow Friction and Wear Properties of TiAlN Coatings Lubricated by Glycerol

作　　者：付小静 李瑞川 高建国 孙会来 万勇 FU Xiaojing;LI Ruichuan;GAO Jianguo;SUN Huilai;WAN Yong(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266033,China;School of Mechanical and Automotive Engineering,Qilu University of Technology,Jinan 250353,China;Qingdao Dagang Customs,Qingdao 266011,China;Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,青岛266033 [2]齐鲁工业大学机械与汽车工程学院,济南250353 [3]青岛大港海关,青岛266011 [4]中国科学院兰州化学物理研究所固体润滑重点实验室,兰州730000

出　　处：《中国表面工程》2021年第5期198-205,共8页China Surface Engineering

基　　金：国家自然科学基金(51975304);山东省自然科学基金(ZR2019MEE016);2018年工业强基工程(TC180A3Y1)资助项目。

摘　　要：TiAlN涂层具有优异的力学性能,在刀具领域具有广泛的应用背景,然而优化制备参数以获得性能更为优异的TiAlN涂层仍需要做进一步的研究,同时与TiAlN涂层相适应的绿色润滑剂也是当前亟待解决的问题之一。基于磁控溅射技术,研究Al靶溅射电流对TiAlN涂层结构和力学性能的影响,考察甘油润滑下TiAlN涂层的摩擦学性能,并利用X射线光电子能谱探究甘油的润滑机理。结果表明:当溅射电流为3 A时得到的TiAlN-3A涂层具有最致密的晶状结构及最优的力学性能。在甘油润滑下,TiAlN-3A涂层的摩擦因数仅为0.007,其磨损率为2.62×10^(-6)mm^(3)N^(-1)m^(-1)。XPS分析表明,甘油在钢球与TiAlN涂层相对滑动过程中发生摩擦降解反应,在表面上生成新的产物FeOOH。FeOOH的亲水性使得在接触区域表面吸附甘油分子及甘油降解产物形成流体润滑层,可提供优异的减摩和耐磨性能。TiAlN coating has found a wide application in the tool field as its excellent mechanical properties.However,more research is still needed to optimize the processing parameters to enhance mechanical properties of TiAlN coating.Moreover,it is urgent to develop green lubricants which are compatible with TiAlN coating.Based on magnetron sputtering technology,the effect of Al target sputtering current on the microstructure and mechanical properties of TiAlN coatings was studied,and the tribological properties of TiAlN coatings under glycerol lubrication conditions were evaluated.The action mechanism of glycerol on TiAlN coating was explored by using X-ray photoelectron spectroscopy.The results showed that TiAlN-3A coating obtained at 3 A has the densest crystalline structure and the best mechanical properties.The friction coefficient of TiAlN-3A coating was only 0.007,and its wear rate was 2.62×10^(-6)mm^(3)N^(-1)m^(-1) under lubrication of glycerol.XPS analysis indicated that the degradation reaction of glycerol occurred during the sliding of the steel ball against the TiAlN coating,and a new product FeOOH was formed on the surface.Due to the hydrophilicity of FeO OH,glycerol molecules and its degradation products were adsorbed on the surface of the contact area to form a fluid lubricant layer,providing excellent friction-reducing and wear resistant properties.

关 键 词：TiAlN硬质涂层 磁控溅射 甘油润滑 摩擦降解 流体润滑层 

分 类 号：TG174[金属学及工艺—金属表面处理] TH117[金属学及工艺—金属学]