SnAgCu-Al_(2)O_(3)在不同织构角度下对TiNi润滑行为的影响  

Effect of SnAgCu-Al_(2)O_(3)on TiNi Lubrication Behavior at Different Texture Angles

作　　者：熊亚辉 林海波 熊邦英 杨慷 XIONG Yahui;LIN Haibo;XIONG Bangying;YANG Kang(College of Mechanical Engineering,Sichuan University of Science&Engineering,Sichuan Zigong 643000,China;Innovation Center for Chenguang High Performance Fluorine Material,Sichuan Zigong 643000,China;College of Mechanical Engineering,Anyang Institute of Technology,Henan Anyang 455000,China)

机构地区：[1]四川轻化工大学机械工程学院,四川自贡643000 [2]晨光高性能氟材料创新中心,四川自贡643000 [3]安阳工学院机械工程学院,河南安阳455000

出　　处：《表面技术》2024年第17期103-111,共9页Surface Technology

基　　金：四川轻化工大学晨光高性能氟材料创新中心(SCFY2208);河南博士后基金(907301210);河南省科技厅科技攻关项目(212102210111);河南省青年教师重点培训项目(2021GGJS149)。

摘　　要：目的研究高镍钛基合金(TiNi)的摩擦学性能以提高其使用精度和服役寿命。方法以TiNi为研究对象,结合仿生学方法在TiNi表面设计并制备了鱼鳞状表面织构。随后将复合固体润滑剂Sn AgCu-Al_(2)O_(3)(S-A)均匀填充至织构,使用摩擦磨损测试仪对制备的样品进行摩擦实验。最后利用场发射扫描电子显微镜和三维表面形貌仪对磨痕表面进行表征,重点分析表面织构的角度参数对复合材料Sn Ag Cu-Al_(2)O_(3)/TiNi(S-A/TiNi)摩擦学性能的影响。结果与TiNi相比,当表面织构的角度为70°时,S-A/TiNi-70°的平均摩擦因数和磨损率分别降低约81.8%和85.5%,其值分别约为0.1和1.2×10^(-13)m^(3)/(N·m)。结论研究过程中发现,S-A/TiNi-70°试样表现的优异摩擦学性能依赖于S-A固体润滑膜的完整性,摩擦表面形成的固体润滑膜越连续其表面磨损越小。S-A/TiNi-70°试样优异的摩擦学性能主要归因于在表面织构角度为70°时,织构凹槽中的S-A固体润滑剂相较于其他角度更容易流动。这导致织构凹槽中的润滑剂能够大量迁移到摩擦表面形成S-A固体润滑膜,从而减少了摩擦副和基体直接接触。High-nickel-titanium-based alloys(TiNi)have the advantages of low density,high strength,corrosion resistance,and high temperature resistance.TiNi-based alloys are often used instead of traditional steel to prepare aerospace bearings.However,the TiNi alloys have large friction coefficients and poor wear resistance,which reduce the accuracy and service life of the bearing.Therefore,it is an effective way to improve the tribological properties of TiNi materials by using bionic methods to build microstructures on the surface and filling solid lubricants to achieve self-compensating lubrication.Since the combination of the biomimetic surface structure and the solid lubricant determines the functionality of the composite structure,the work aims to design and prepare the surface texture of fish scales on the surface of TiNi-based alloy based on biomimetic methods.In order to fully utilize the performance of the solid lubricant,the composition and proportions of the lubricant were designed.Finally,the effect of the synergistic effect of between the surface structure angle parameters and the lubricant on the tribological properties of the material surface was analyzed.For the preparation of TiNi-based alloys,Ti,Ni,Al,Nb,Mo,Si and Cr powders were selected on the basis of mass percentage,such as 67wt.%Ti,12wt.%Ni,10wt.%Al,5wt.%Nb,0.75wt.%Mo,4.5wt.%Si and 0.75wt.%Cr.The uniformly mixed powder was dried and loaded into a graphene grinding tool with an inner diameter of 25 mm for spark plasma sintering.The initially sintered TiNi sample was cut and polished so that the laser marking machine could print microstructures on the flat sample surface.The design inspiration and data of the surface texture came from the scales of arapaima,and the groove width and depth formed by this structure were 0.6 mm.The smaller included angles between the formed rhombic structures were 50°,60°,70°,80°,and 90°,respectively.The S-A composite solid lubricant was composed of SnAgCu with low shear strength and Al_(2)O_(3)with high load-carrying

关 键 词：S-A/TiNi 摩擦学性能 表面织构 润滑行为 固体润滑剂 

分 类 号：TH117[机械工程—机械设计及理论]