School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Jiangsu Key Laboratory of Advanced Micro/nano Materials and Technologies, Nanjing 210094, China.
School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Jiangsu Key Laboratory of Advanced Micro/nano Materials and Technologies, Nanjing 210094, China.
Mater Sci Eng C Mater Biol Appl. 2018 Sep 1;90:219-226. doi: 10.1016/j.msec.2018.04.057. Epub 2018 Apr 21.
To improve the tribological properties of Ti6Al4V alloy to realize the application in artificial joints, a novel composite coating was designed and fabricated on its surface through the combination of two different surface modification techniques-micro-arc oxidation (MAO) and grafting hydrophilic polymer. The characterizations of morphologies and composition of MAO layer were examined using scanning electron microscopy (SEM), energy dispersive spectroscope (EDS) and X-ray diffraction (XRD). It was found that a TiO layer displaying uniform porous structure formed on the surface based on the optimal MAO parameters of an oxidation voltage of 450 V and an oxidation time of 60 min. After grafting 3-dimethyl(3-(N-methacrylamido)propyl) ammonium propane sulfonate (MPDSAH), Fourier-transform infrared spectroscopy with attenuated total reflection (FT-IR/ATR) and wettability test demonstrated the successful modification. Tribological performance of composite coating-modified Ti6Al4V alloy in water exhibited the low friction coefficient of 0.13 and favorable wear resistance.
为改善 Ti6Al4V 合金的摩擦学性能，实现其在人工关节中的应用，通过将两种不同的表面改性技术——微弧氧化（MAO）和接枝亲水性聚合物相结合，在其表面设计并制备了一种新型复合涂层。采用扫描电子显微镜（SEM）、能谱仪（EDS）和 X 射线衍射（XRD）对 MAO 层的形貌和组成进行了表征。结果发现，基于最优的氧化电压 450 V 和氧化时间 60 min，在表面形成了具有均匀多孔结构的 TiO 层。接枝 3-二甲氨基（3-（N-丙烯酰胺基）丙基）铵丙烷磺酸盐（MPDSAH）后，衰减全反射傅里叶变换红外光谱（FT-IR/ATR）和润湿性测试表明成功进行了修饰。在水中，复合涂层改性 Ti6Al4V 合金的摩擦学性能表现出较低的摩擦系数 0.13 和良好的耐磨性。
