The effect of concentration of Calcium phosphate salts on morphology and nanostructure of hydroxyapatite coating on titanium with thermal - electrodeposition method

Titanium and titanium alloys are used in medical and dental applications wildly. In spite of good mechanical properties, they have a poor ability of bone growth on the surface of themselves. Therefore, it is necessary that the titanium must be coated with a bioceramic layer due to the excellent osteoconductive properties. In this research, thermal - electrochemical deposition method (ELD) was used to apply hydroxyapatite coating on titanium substrate. Before applying hydroxyapatite coating, surface treatment process was achieved on titanium samples by polishing, Then the effect of salts concentration on the morphology and nanostructure under constant conditions. After achieving above steps, micro structural, dimension of crystals, and morphology of hydroxyapatite coating were studied by using XRD, FTIR, TEM, SEM, and AFM. Obtained results showed by increasing the concentration of calcium and phosphate ions, hydroxyapatite crystals have preferred growth on (002) planes with nano scale.