Effect of heat treatment atmosphere on the structure and apatite-inducing ability of Ca, P, Si and Na incorporated microarc oxidation coating on titanium

Rui Zhou, Rui Zhou, Daqing Wei, Wei Feng, Qing Du, Baoqiang Li, Yaming Wang, Dechang Jia, Yu Zhou, Jianyun Cao, Su Cheng

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Amorphous microarc oxidation (MAO) coating containing Ca, P, Si and Na elements on Ti substrate has been heat treated in different atmospheres (air or argon) to adjust the phase composition, surface structure and bioactivity. After heat treatment in air at 800 °C for 1 h, the coating consists of anatase, rutile and CaTi4(PO4)6, with almost unchanged microporous surface structure. As for the one treated in argon at 800 °C for 1 h, anatase and rutile are formed on the coating, and the coating surface is covered by flower-like rutile particles. The formation of rutile particles could be attributed to the prior growth of the oxidized β-Ti along the discharge channel caused by the diffusion of incorporated elements. Thanks to the crystallization of TiO2 and the rise of surface roughness, which provides good sites for apatite nucleation, the MAO coated Ti after heat treatment in argon at 800 °C exhibits good apatite-inducing ability.

    Original languageEnglish
    Pages (from-to)190-198
    Number of pages9
    JournalSurface and Coatings Technology
    Volume310
    Early online date16 Dec 2016
    DOIs
    Publication statusPublished - 25 Jan 2017

    Keywords

    • Apatite-inducing ability
    • Heat treatment atmosphere
    • Microarc oxidation
    • Structure
    • Titanium

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