Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 13, 2020 - September 16, 2020
This study aims at analyzing the phase composition of Hydroxyapatite/TiO2 coating fabricated by Suspension Plasm Spray (SPS). Hydroxyapatite[Ca10(PO4)6(OH)2, HAp] is a bio-ceramic material used as a plasma-sprayed coating to promote osseointegration of femoral stems. The HAp coatings are fabricated mostly by atmospheric plasma spraying (APS) process. But it provides coating with amorphous phase which is not suitable bio-integration. Suspension plasma Spray (SPS) is relatively new technique used to abstain coating from thermal decomposition. In this study SPS successfully deposited homogeneous, less porosity HAp coating onto the surface of titanium substrate. Furthermore, SPS firstly could deposit composite coating of HAp / Titania. This is oxygen-deficient types of composite coating, which can be functioned as visible-light responsive photocatalyst. Microstructure of titania coating is then characterized using XRD and Raman spectra to identify its crystal structure, and it contained oxygen-deficient phase of TiO2. Details phase analysis of the phase composition was conducted by both Raman peak fitting analysis and XRD Rietveld analysis to validate the existence of Magneli phases which is important for antibacterial property of the biomaterial coating.
