Characterization and properties of microarc oxidized coatings containing Si, Ca and Na on titanium

To form bioactive microarc oxidized (MAO) coatings on titanium, the exploration for introducing various elements into the TiO₂-based MAO coatings has been continually noticed. In this work, novel MAO coatings containing Si, Ca and Na (SCN) elements were prepared on titanium. The elemental composition, mechanical properties, corrosion resistance and apatite-forming ability of TiO₂-based MAO coatings containing SCN were investigated. The surface hardness, elastic modulus, elastic recovery and corrosion resistance of the MAO coatings containing SCN were improved obviously by increasing the applied voltages. And the effect of applied voltage on the wetting ability of MAO coatings containing SCN is not significant. The current results indicated that the MAO coating containing SCN possesses good apatite-forming ability. The apatite-bonding structure is highly dependent on the chemical reactivity of the materials surface in simulated body fluid.