Ti-6Al-4V钛合金表面疏水性复合膜的制备及其微摩擦磨损性能  

Preparation and Micro-tribological Behavior of Hydrophobic Composite Films on Surface of Ti-6Al-4V Titanium Alloy

作　　者：方刚[1] 刘秦[1] 康志新[1] 王芳[2] 

机构地区：[1]华南理工大学机械与汽车工程学院国家金属材料近净成形工程技术研究中心,广东广州510640 [2]西北农林科技大学理学院,陕西杨凌712100

出　　处：《摩擦学学报》2011年第6期534-539,共6页Tribology

基　　金：国家自然科学基金(51075151);广东省自然科学基金重点项目(10251064101000001)资助~~

摘　　要：通过自组装分子膜(SAMs)方法和有机镀膜技术在Ti-6Al-4V钛合金表面成功制备了三嗪硫醇三乙基硅烷(TES)自组装分子膜(TES-SAMs)和含氟官能团的三嗪硫醇(ATP)复合膜(TES-ATP).采用X射线光电子能谱仪、接触角测量仪、椭圆偏振光谱仪、原子力显微镜、超景深三维显微镜和UMT-2型摩擦磨损试验机评价薄膜结构及其微摩擦学特性.研究结果表明:TES-SAMs自组装分子膜和TES-ATP复合膜的膜厚分别为3.9和22.2 nm,其对蒸馏水的接触角分别为94.5°和130.5°,呈疏水性.TES-SAMs自组装分子膜和TES-ATP复合膜均能有效降低基体的摩擦系数,TES-SAMs自组装分子膜的摩擦系数稳定在0.23,TES-ATP复合膜的摩擦系数为0.17,而空白基体的摩擦系数为0.50;同时TES-ATP复合膜还表现出良好的抗磨性能.6-（3-triethoxysilylpropylamino）-1,3,5-triazine-2,4-dithiol monosodium（TES） and 6-（N-allyl-1,1,2,2-tetrahydroperfluorodecylamino）-1,3,5-triazine-2,4-dithiol monosodium（ATP） were used to formation of TES-SAMs and TES-ATP composite films on the surface of Ti-6Al-4V titanium alloy by the self-assembled monolayers（SAMs） method and polymer plating technique.The structures of TES-SAMs and TES-ATP composite films were characterized by X-ray photoelectron spectroscopy,contact angle meter,spectroscopic ellipsometer,atomic force microscopy.The UMT-2 tribometer and digital microscopy were utilized to investigate the micro-tribological properties of the films.The experimental results show that the thicknesses of TES-SAMs and TES-ATP composite films were 3.9 and 22.2 nm and their contact angles of distilled water were 94.5°and 130.5°,respectively,which indicates the surfaces of TES-SAMs and TES-ATP composite films were hydrophobic.The friction coefficient was effectively reduced from 0.50 for substrate to 0.23 of TES-SAMs and 0.17 of TES-ATP composite films.Moreover,TES-ATP composite films possessed excellent antiwear ability.Therefore,this novel technology is provided to improve the tribological properties in MEMS/NEMS.

关 键 词：钛合金 自组装分子膜 有机镀膜 疏水 摩擦学特性 微/纳机电系统 

分 类 号：TH117.1[机械工程—机械设计及理论]