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Indexed by:会议论文

Date of Publication:2010-08-02

Included Journals:EI、CPCI-S、Scopus

Volume:654-656

Page Number:2168-+

Key Words:Micro-arc oxidation; equal channel angular pressing; coating; hydroxyapatite

Abstract:The equal channel angular pressing (ECAP) results in ultrafine-grained (similar to 200-500 nm) Ti with superior mechanical properties without the harmful alloying elements, which is beneficial for medical implants. To improve the bioactivity of Ti surface, Ca/P-containing porous titania coating were prepared on the ultrafine-grained Ti and coarse-grained Ti by micro-arc oxidation (MAO) in Ca/P based solution. The phase identification, thickness, composition and morphology of the coatings were analyzed. The amounts of Ca, P and Ca/P ratio of the MAO coating formed on ultrafine-grained Ti were higher than those for coarse-grained Ti samples. Hydroxyapatite and alpha-Ca-3(PO4)(2) phases appeared in MAO coating formed on ECAP-treated Ti with increasing reaction time of 20 min (E20). Incubated in simulated body fluid within 2 days, bone-like apatite was completely formed on E20 surface, as evidenced of preferable bioactivity.