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Formation of CaTiO 3 /TiO 2 composite coating on titanium alloy for biomedical applications
Author(s) -
Wei Daqing,
Zhou Yu,
Jia Dechang,
Wang Yaming
Publication year - 2008
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30890
Subject(s) - coating , simulated body fluid , apatite , materials science , chemical engineering , titanium , nucleation , composite number , alloy , titanium alloy , ionic bonding , porosity , composite material , metallurgy , ion , chemistry , organic chemistry , engineering
Plasma electrochemical oxidation (PEO) was used to prepare TiO 2 ‐based coating containing Ca and P on titanium alloy. After alkali‐ and then heat‐treatment at 800°C of the PEO coating, a CaTiO 3 /TiO 2 composite (CTC) coating was obtained. The current results indicate that the apatite‐forming ability of the CTC coating is higher than that of the PEO coating. During the simulated body fluid (SBF) incubation, Ca of the CTC coating is released into the SBF. An ionic exchange between Ca 2+ ions of the CTC coating and H 3 O + ions of the SBF may take place during the SBF incubation. As a result, the abundant TiOH groups are formed on the surface of the CTC coating. The hydroxyl functionalized surface greatly enhances the nucleation and growth of apatite, leading to the high apatite‐forming ability of the CTC coating. The apatite induced by the CTC coating exhibits a porous and carbonated structure. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2008