Surface Modification of Titanium and Titanium Alloy Using Ceramic Biomaterials by RF Sputtering

The current in this thesis research deals with the plasma sputtering which was used to deposit single and triple layers ceramics on (cpTi) and ( Ti-6Al-4V) alloy. Also ,in this work the in vitro electrochemical tests  , formation of HAp by biomimetic process on the coated layers by the immersion in Simulated Body Fluid(SBF) at PH equal to 7.4 and room temperature was done . The single layer TiO 2and HAp , multi-layer consist of TiO2 and Al were deposited on cpTi and Ti-6Al-4Valloy, followed by the deposition of  third layer of HAp. The deposition conditions in the RF sputtering system such as vacuum pressure, substrate temperature, power, gas type, gas flow and deposition time were fixed for the sputtering system where as the distance between the target and the substrate was varied (9 and 7 cm). Structural analysis was carried out ,  on the deposited layers(single  and triple) using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Furrier Transformation Infra-Red (FTIR), Raman Spectroscopy and X-ray
Photoelectron Spectroscopy (XPS). Elemental analysis for HAp deposited in the single and triple layer was done using Energy Dispersive X-ray Spectroscopy (EDS).To investigate   the biocompatibility of coatings the formed layers, were 2O3 immersed in (SBF) for one month. After one month the samples were taken and anlyezed using the same structural analysis techniques used before immersion.Electrochemical investigation was  carried out on the deposited layers used Open Circuit Potential (OCP),Linear Sweep Voltage(LSV) and Electrochemical Impedance Spectroscopy(EIS) in SBF. The XRD structural results show  that the formation of HAp which  was  dominated on the phase formation on the surface of the single and triple layers. Also another Calcium –Phosphorus compound phases  are found such as Tri Calcium Phosphate(TCP), Octa Calcium Phosphate(OCP) and Calcium Phosphate(CP) along with small fraction