Formation of HA/Al2O3 composite coating on NiTi alloy by micro-arc oxidation and hydrothermal treatment

Fu LIU; Hairui WANG; Xiangqun CHEN; Fuping WANG

doi:10.2109/jcersj2.120.548

Feature: Advanced Ceramic Science and Technology in the Western Pacific Rim Area: Notes

Formation of HA/Al₂O₃ composite coating on NiTi alloy by micro-arc oxidation and hydrothermal treatment

Fu LIU, Hairui WANG, Xiangqun CHEN, Fuping WANG

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Keywords: Micro-arc oxidation, NiTi alloy, Al₂O₃, Hydroxyapatite, Composite coating

JOURNAL FREE ACCESS

2012 Volume 120 Issue 1407 Pages 548-550

DOI https://doi.org/10.2109/jcersj2.120.548

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Abstract

The ceramic coating was prepared in an electrolyte containing EDTA-Ca, NaAlO₂ and Na₃PO₄ by Micro-arc oxidation. The surface of ceramic coating displays a rough, porous structure. The ceramic coating is composed of Al, Ti, Ni, O, Ca and P. Thin-film X-ray diffraction shows that the ceramic coating is composed of Al₂O₃ phase. After hydrothermal treatment, the porous composite coating consisting of Al₂O₃ and hydroxyapatite was prepared on MAO-treated NiTi alloy.

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