材料科学
涂层
氧化物
物理气相沉积
腐蚀
极化(电化学)
电解质
化学工程
复合材料
冶金
工程类
化学
物理化学
电极
作者
Roman Gabor,Ladislav Cvrček,Martina Doubková,V. Nehasil,Josef Hlinka,Petr Unucka,Matěj Buřil,Adéla Podepřelová,Jana Seidlerová,Lucie Bačáková
标识
DOI:10.1016/j.matdes.2022.110811
摘要
This study is focused on the preparation of new hybrid layers intended for surface modification of Ti-6Al-4V alloys for potential orthopaedic and dental applications. Combination of the technology of physical vapour deposition (PVD) and subsequent micro-arc oxidation (MAO) was utilized for the deposition of Ti and ZrTi to form hybrid oxide layers. The oxide layers were prepared using an alkaline electrolyte with glycerol as an additive under micro-arc discharge conditions with different Si content on their surfaces. The hybrid ZrTi coatings with a Zr/Si structure achieved the best tribological properties described by a low friction coefficient of 0.3 and high abrasion resistance. There was also an increase in corrosion potential and polarization resistance of hybrid ZrTi coatings. Although the proliferation of human bone marrow mesenchymal stem cells was slower on these hydrophilic Ti and ZrTi coatings than both on uncoated Ti-6Al-4V and the reference tissue culture polystyrene dishes, both types of hybrid coating promoted greater osteogenic differentiation of these cells, indicated by approx. twice as high activity of alkaline phosphatase. The hybrid oxide layers newly developed in this study – especially the layers with Zr – are therefore promising for coating metallic bone implants.
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