Nano structured hydroxyapatite coating on anodized AZ61-Mg alloy by High Velocity Oxygen Fuel (HVOF)

Thursday, May 10, 2018: 9:40 AM
Sarasota 3 (Gaylord Palms Resort )
Prof. Hamidreza salimijazi , Isfahan university of technology, Isfahan, Iran
Prof. fatollah karimizadeh , Isfahan university of technology, Isfahan, Iran
Mrs. Marzieh Mardali , Isfahan university of technology, Isfahan, Iran
Prof. Thomas W. Coyle , Centre for Advanced Coating Technologies (CACT), University of Toronto, Toronto, ON, Canada
Hydroxyapatite (HA) coatings are widely used in biomaterial applications such as implants coatings. In this study, nanostructured HA coatings were used to control the rate of degradation of magnesium implants. HA nanostructured powders were extracted from bovine bone as a biological source. Coatings were deposited on both bare and anodized AZ31 alloy substrates by high velocity oxy-fuel.

Phase compositions, microstructures and surface morphologies were investigated using X-ray diffraction, atomic force microscopy, scanning electron microscopy and energy dispersive spectrometer (EDS) spectra. The coatings/substrates adhesion strengths were measured by pull-off test. Potentiodynamic polarization and immersion tests in simulated body fluid (SBF) were performed to measure the corrosion rate of the uncoated and coated specimens.

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