Preparation and Properties of Chemically Bonded Ceramic Coatings Reinforced by GO-TiO2 composites

Abstract

Graphene oxide (GO) decorated by titanium dioxide (TiO₂) was fabricated and introduced into the chemically bonded ceramic coatings as a nanofiller. The analysis of the results of thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electronic microscopy (SEM), and transmission electron microscopy (TEM) show that TiO₂ has decorated on the surface of GO by chemical bonds. Furthermore, the effect of incorporating GO-TiO₂ on properties of ceramic coatings was investigated. The results show that GO-TiO₂ achieved a homogeneous dispersion and compatibility in ceramic matrix without obvious cracks. The potentiodynamic polarization test was conducted to investigate the influence of GO-TiO₂ on the corrosion behavior. The results demonstrated that corrosion resistance of ceramic coatings remarkably enhanced by adding GO-TiO₂. Furthermore, the anticorrosive mechanisms of ceramic coatings with GO-TiO₂ were tentatively discussed.