B-TCP COATING ON CP-TI USING HIGH VELOCITY OXY FUEL WITH ADDITIONAL TIO2 LAYER

• Main Author: Alvian Muhammad, Gilang
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/72065
• Institution: Institut Teknologi Bandung

?-Tricalcium Phosphate (?-TCP) is one of the calcium phosphate compounds that is often used to coat pure titanium implants due to its better solubility and osteoconductivity properties compared to other calcium phosphate compounds. However, the result of ?-TCP coating on titanium substrate had adhesive strength below the ISO-13779-2 standard. An additional TiO2 layer was formed on the substrate to overcome this limitation to improve the adhesive strength. This research was designed to determine the effect of oxidation method and parameters on the homogeneity of ?-TCP coated on titanium substrate. The formation of TiO2 layer was performed by thermal oxidation with temperature variation and anodization with voltage variation. Then, the TiO2 layer was characterized by X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM). Further, the result of ?TCP coating on oxidized titanium was compared with the result of ?-TCP coating on sandblasted pure titanium as the control variable. Further characterization was performed using Scanning Electron Microscope-Energy Dispersive Spectroscopy (SEM-EDS) on the ?-TCP coating results. The formation of TiO2 layer by thermal oxidation forms the rutile phase, while anodization forms the anatase phase. Increased temperature in heat treatments forms bigger oxide scale and thicker layer of TiO2, while increased voltage during anodization forms larger pores and thicker TiO2 layer. The result of ?-TCP coating on oxidized titanium did not produce a homogeneous layer like sandblasted titanium. When viewed from the cross-section, each sample produces porosity in the interface area between the ?-TCP layer and the titanium and TiO2 substrate.