Mechanical and microscopic features of hydroxyapatite coatings on titanium substrates with a bond coat

The focus of the present study is based on the change in morphology and bond strength of hydroxyapatite coatings in the presence of a bond coat. The adherence of hydroxyapatite coatings to titanium substrates was improved with an intermediate Promaxon bond coat. The deposition of both hydroxyapatite coatings and Promaxon coatings was carried out using the dip coating technique. As deposited coatings were sintered at varying temperatures. X-ray diffractometry (XRD) and Scanning electron microscopy (SEM) were used to identify the phases and observe the morphology of the coating surface. Observation of the morphology by SEM showed the linking of Promaxon grains with hydroxyapatite grains as the sintering temperature was raised. Adhesive tests indicated that the bonding between titanium and hydroxyapatite be improved with a Promaxon bond coat.