【摘 要】
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To study the effect of electrolytic concentration, bioactive ceramic films containing Ca and P on the surface of the Ti6Al4V alloy were prepared by micro-arc ox
【机 构】
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School of Material Science and Engineering
论文部分内容阅读
To study the effect of electrolytic concentration, bioactive ceramic films containing Ca and P on the surface of the Ti6Al4V alloy were prepared by micro-arc oxidation (MAO) in aqueous solutions of different concentrations. Composition, mi-cro-morphology, wettability of the films and their corrosion behavior in a Hanks SBF were studied. Our experimental results show that the film is mainly composed of anatase, ruffle and amorphous phases. With an increase in electrolytic concentration, the ratio of ruffle in films enlarge and small amounts of calcium phosphate (Ca3(PO4)2) and hydroxyapatite (HA) appear. The number of mi-cropores in films increases but their dimensions decrease and their porosities increase slightly. As the surface roughness of MAO film increases with concentration, the wettablility of the oxide film improves continually, while micro-hardness increases at first and then decreases. MAO treatment clearly improves the corrosion resistance of substrates in a Hanks SBF.
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