Effect of time on the formation of hydroxyapatite in PEO process with hydrothermal treatment of the Ti-6Al-4V alloy
A titania layer containing calcium and phosphate with rough and porous structure was prepared by plasma electrolytic oxidation (PEO) and hydrothermal treatment (HT) at different time treatment. The most corresponding to the stoichiometry of hydroxiapatite ratio of Ca: P in the oxide layer can be achieved by the optimization of the electrolyte composition and the main parameters of PEO. While at the stage of PEO hydroxiaptite precursors are formed with only residual quantity of the hydroxyapatite, the subsequent hydrothermal treatment results in the formation of a much more pronounced hydroxyapatite phase.
Keywordsplasma electrolytic oxidation hydroxyapatite oxide layers biomaterials osseointegration
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- 17.Montazeri, M., Dehghanian, C., Shokouhfar, M., and Baradaran, A., Investigation of the voltage and time effects on the formation of hydroxyapatite-containing titania prepared by plasma electrolytic oxidation on Ti-6Al-4V alloy and its corrosion behavior, Appl. Surf. Sci., 2001, vol. 257, pp. 7268–7275.CrossRefGoogle Scholar
- 18.Hanawa, T., Kon, M., Doi, H., Ukai, H., Murakami, K., Hamanaka, H., and Asaoka, K., Amount of hydroxyl radical on calcium-ion-implanted titanium and point of zero charge of constituent oxide of the surface-modified layer, J. Mater. Sci.: Mater. Med., 1998, vol. 9, no. 2, pp. 89–92.Google Scholar