Influence of Applied Voltage on the Structure of Micro-Plasma Oxidized Titania-Based Coatings Formed in an Electrolyte Containing Nano-HA and Calcium Salts and Phosphate

Abstract:

In this work, porous titania-based coatings containing Ca and P ions were prepared on titanium alloy by micro-plasma oxidation (MPO) in an electrolyte containing nano-HA, calcium salts and phosphate under various applied voltages (200~450 V). The results showed that the MPO coatings formed at 250-450 V were composed of anatase and amorphous phase. With increasing applied voltage, the micropore size and thickness of the MPO coatings increase, while the micropore number decreases. Furthermore, the Ca and P concentrations, as well as atomic ratio of Ca/P are highly dependent on the applied voltage. In addition, the cross-sectional view results showed good adhesion between the MPO coatings and titanium alloy substrate at various applied voltages. In vitro experiments indicated that the MPO coating can induce apatite formation.

• Periodical: Key Engineering Materials (Volumes 368-372)
• Pages: 1209-1211
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.368-372.1209
• Online since: February 2008
• Authors: Da Qing Wei, Yu Zhou, De Chang Jia, Ya Ming Wang
• Keywords: Coating, Micro-Plasma Oxidation, TiAl, Titania

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