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Synthesis of bioactive ceramic on the titanium substrate by micro‐arc oxidation
Author(s) -
Zhao Zhongwei,
Chen Xingyu,
Chen Ailiang,
Shen Meiling,
Wen Shimei
Publication year - 2009
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.31902
Subject(s) - materials science , rutile , electrolyte , anatase , ceramic , titanium , apatite , chemical engineering , substrate (aquarium) , phase (matter) , current density , metallurgy , electrode , chemistry , catalysis , photocatalysis , organic chemistry , quantum mechanics , oceanography , physics , engineering , geology
Bioactive ceramic films on titanium substrate are prepared successfully by micro‐arc oxidation in electrolyte solution containing NaOH only. The coatings are prepared by micro‐arc oxidation at various applied current densities (200–400 mA/cm 2 ) and in NaOH electrolyte with different concentrations. The XRD shows that they are composed of rutile, anatase, Na 2 Ti 6 O 13 , and Na 2 Ti 4 O 9 phases. The composition and surface morphologies are strongly dependent on the applied current density and electrolyte concentration. For example, at high current density, the phase is mainly composed of rutile and Na 2 Ti 6 O 13 , and at high electrolyte concentration, it is Na 2 Ti 6 O 13 phase. The morphologies of the samples vary with the increase of current and electrolyte concentration. The apatite‐inducing ability of bioactive ceramic films is evaluated in biological model fluids. After soaking in biological model fluids, the titania‐based coatings containing Na 2 Ti 6 O 13 phase have excellent capability of inducing bone‐like apatite. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res, 2009