پوريا حبيب زاده اصل ممقاني

In the current research, the effect of diamond-like carbon coating to modify the surface of Ti6Al4V alloy was eva‎luated by examining its tribological properties and biocompatibility using the Electrolytic deposition (Electrodeposition) method at an applied potential of 16 volts. In this regard, the effect of deposition process variables such as the concentration of constituents of the electrolyte bath, inter-electrode distance, applied potential, temperature and time on the quality of the formed coating was studied. The nature and structural characteristics of the coating obtained in the best operating conditions were identified with the help of Raman spectroscopy and it was found that the ID/IG ratio is equal to 1.92, the sp3 content is 20%, the carbon clusters are 10.01 nm in size, and its density is 1.37 g/cm3. In the completion of Raman spectroscopy, the amorphous structure of the coating was detected by GIXRD test and the formation of hydrogenated diamond-like carbon coating (a-C:H) was detected by FT-IR spectroscopy. FE-SEM microscope was used to investigate the microstructure of the coating cross-section and the morphology of the used surface and a thickness of 1.74 ± 0.17 µm was detected. On the other hand, the tribological properties of the coating were measured with AFM illustrations, and Nanoindentation, the created coating has a hardness of 4.09 ± 0.12 GPa and a surface roughness of 15.21 nm. Finally, the biocompatibility properties of the created coating were investigated through antibacterial tests, cell viability assay (MTT), corrosion in simulated body fluid and biodegradability. The results obtained from the eva‎luation of biocompatibility properties indicate that the coating is non-toxic and the survival rate is 91.12±0.03% with a contact angle of 70.7±2.6 degrees. Also, according to the potentiodynamic polarization and impedance spectroscopy tests, the deposited coating can provide 24.40% resistance against the simulated corrosive environment of the body for the titanium substrate, which promises a promising coating for medical applications.

آلياژ Ti6Al4V , كربن الماس‌گون , خواص زيست‌سازگاري , الكتروليز ولتاژ پايين

Ti6Al4V , Diamond-like carbon , Low voltage electrolysis , Biocompatibility properties

Pooriya Habibzade

Dr. Alireza Zakeri