Enhanced Bioactivity of Chemically Oxidization-Modified Titanium Alloys

Abstract:

Anatase-type titanium dioxide oxide layer was formed on the surface of titanium alloy by chemical oxidation. 0.9 um thick anatase was obtained by soaking in a mixed solution of a certain proportion of hydrogen peroxide and hydrochloric acid and then heat treatment. The surface morphology, phase structures and composition of oxide layers were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Thickness of titania coating was measured by the ball pit gauge. Inductively coupled plasma atomic emission spectroscopy (ICP-AES) was used to detect the change of Ca ion and P ion concentration in solution. The results showed that anatase layers deposited apatite within 4 days accompanying the decrease of pH when soaked in simulated human body fluid (SBF). Ion exchange between the negative ions and calcium ions in SBF is proposed as the mechanism operative to favor the deposition on apatite.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 564-569
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.564
• Online since: August 2018
• Authors: Ya Ming Wang, Yong Fa Song, Shun Lan Deng, Osaka Akiyoshi, Guang Xin Wang*, Yan Fu Yan
• Keywords: Anatase, Apatite, Bioactivity, Hydrogen Peroxide/Hydrochloric Acid

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