The effect of substrate thickness on air plasma sprayed hydroxyapatite coatings

This study was conducted by plasma spraying a HAp powder on Ti-6Al-4V substrates of different thicknesses. The effect of coating HAp on substrates with different thicknesses was investigated before and after immersing the sample in simulated bodily fluid. Immersion in simulated bodily fluid (SBF) was for various periods (7, 28 and 56 days). The structural changes, phase composition and stress before and after immersion were analysed using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS).