Surface & Coatings Technology ( IF 5.4 ) Pub Date : 2020-01-25 , DOI: 10.1016/j.surfcoat.2020.125412 R. Bahi , C. Nouveau , N.E. Beliardouh , C.E. Ramoul , S. Meddah , O. Ghelloudj
Multilayered and nanostructured coatings of Ti based alloys (oxides and nitrides) are elaborated and tested for increasing protective properties such as corrosion and wear resistances. A pin-on-disc tribometer was used to evaluate the wear resistance in Hank's solution against bovine bone. Corrosion behavior in Hank's solution was determined by potentiodynamic and electrochemical impedance spectroscopy techniques. Besides, the specimen surfaces were characterized by Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) microanalyses. The results showed that optimal tribological properties were obtained in the case of coatings having TiN as top layer. The main wear mechanism was abrasive third body wear. In vitro corrosion tests at 37 °C showed that the better corrosion resistance was obtained when TiN was the top layer. However all of them exhibited good tribological properties, good corrosion resistance and then may be promising options for biomedical applications.
中文翻译:
Ti-6Al-4V基材涂覆的PVD多层膜在生物环境中的表面性能
对Ti基合金(氧化物和氮化物)的多层纳米结构涂层进行了精心设计和测试,以提高其防护性能,例如耐腐蚀和耐磨性。用针盘式摩擦计评估汉克溶液对牛骨的耐磨性。通过电位动力学和电化学阻抗谱技术确定了汉克溶液中的腐蚀行为。此外,通过原子力显微镜(AFM),扫描电子显微镜(SEM)和能量分散光谱(EDS)显微分析对样品表面进行了表征。结果表明,在具有TiN作为顶层的涂层的情况下,获得了最佳的摩擦学性能。主要磨损机理是第三体的磨料磨损。在37°C的体外腐蚀测试表明,当TiN为顶层时,可以获得更好的耐腐蚀性。然而,它们均表现出良好的摩擦学性能,良好的耐腐蚀性,因此对于生物医学应用而言可能是有前途的选择。