Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 18, Issue 3, Pages 631-635Publisher
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DOI: 10.1016/S1003-6326(08)60110-7
Keywords
anodic oxidation; nanotubes; hydroxyapatite; electrochemical deposition
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Hydroxyapatite(HA) coating has been prepared on titanium substrate through an electrochemical deposition approach. In order to improve the bonding strength between HA coating and Ti substrate, a well oriented and uniform titanium oxide nanotube array on the surface of titanium substrate was applied by means of anodic oxidation pre-treatment. Then the calcium hydrogen phosphate(CaHPO4 center dot 2H(2)O, DCPD) coating, as the precursor of hydroxyapatite coating, was electrodeposited on the anodized Ti. At the initial stage of electro-deposition, the DCPD crystals, in nanometer precipitates, are anchored in and between the tubes. With increasing the deposition time, the nanometer DCPD crystals re connected together to form a continuous coating on titanium oxide nanotube array. Finally, the DCPD coating is converted into hydroxyapatite one simply by being immersed in alkaline solution.
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