Laser surface alloying of 316L stainless steel coated with a bioactive hydroxyapatite-titanium oxide composite.

El-Sayed Ghaith, Simon Hodgson, Martin Sharp

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    Abstract

    Laser surface alloying is a powerful technique for improving the mechanical and chemical properties of engineering components. In this study, laser surface irradiation process employed in the surface modification off 316L stainless steel substrate using hydroxyapatite-titanium oxide to provide a composite ceramic layer for the suitability of applying this technology to improve the biocompatibility of medical alloys and implants. Fusion of the metal surface incorporating hydroxyapatite-titania ceramic particles using a 30 W Nd:YAG laser at different laser powers, 40, 50 and 70% power and a scan speed of 40 mm s(-1) was observed to adopt the optimum condition of ceramic deposition. Coatings were evaluated in terms of microstructure, surface morphology, composition biocompatibility using XRD, ATR-FTIR, SEM and EDS. Evaluation of the in vitro bioactivity by soaking the treated metal in SBF for 10 days showed the deposition of biomimetic apatite.
    Original languageEnglish
    Pages (from-to)-
    JournalJournal of materials science. Materials in medicine
    Volume26
    Issue number2
    Early online date31 Jan 2015
    DOIs
    Publication statusPublished - 26 Feb 2015

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