Abstract
Anodization was adopted on a biomedical Zr-based Zr56Al16Co28 bulk metallic glass (BMG). A highly ordered nanotube layer was fabricated on the surface of Zr56Al16Co28 BMG. The highly ordered nanotubes formed at 20V in glycerol electrolyte with 0.5M NH4F and 10vol.% H2O are amorphous with a diameter of ∼20nm, a wall thickness of ∼5nm and a length of ∼620nm. Compared with the original composition, cobalt was excessively dissolved after anodization. The nanotube layer treated by alternative immersion method (AIM) can facilitate the formation of hydroxyapatite (HAp). Bioactivity experiments showed that a thick hydroxyapatite (HAp) layer can form on the treated nanotube layer after immersed in simulated body fluid (SBF) for 7days.
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