Assessing interfacial properties of plasma sprayed bioceramic coating on metal substrate using indentation techniques

Abstract

The assessment of interfacial properties of plasma sprayed bioceramic-coated metal substrates, was described using indentation techniques. The hydroxyapatite (HA) powders used for plasma spraying were produced in-house and their particle size range was about 45∼71 μm. A 100 kW capacity plasma torch was used to deposit HA coatings on Ti-6Al-4V. The Young's modulus increased with increasing plasma energy for both the coating and substrate, and the post-spray heat treatment increased the moduli also. The results show that the adhesion of HA coatings are affected by substrate surface roughness and plasma spray parameters.