Enhanced biocompatibility of biodegradable magnesium alloy modified by TiO2-MgO-GO coating

Graphene oxide can connect sheets to other materials with covalent bonds due to the presence of oxygen groups and has medical applications due to its biocompatibility properties. In this research, TiO 2 - MgO dual layer coatings were applied on AZ91D magnesium alloy by magnetron sputtering method. After that, graphene oxide layer was applied as a filler to increase the surface resistance to cracks using the electrophoretic deposition (EPD) method. X-ray diffraction (XRD) analysis showed the presence of GO peaks and the Raman spectrum showed good and defect-free GO scattering. Microstructural investigations showed that the GO layer diffused the cracks on the surface of the layers and connected the cracks like a bridge. According to the results of the in vitro test, the TiO 2 -MgO-GO multilayer coating can provide the properties of biocompatibility optimally for the AZ91D alloy.