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

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.

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

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 0.50for 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.