Evaluation and characterization of composite coating on ceramic substrate by using dip coating method

Abstract

      In this study, a composite coating of polyurethane resin with (CaSO4) was prepared using different proportions of ceramic powders (0, 5, 10, 15 and 20 wt.%) as a strengthening technique in the polymer matrix using adventitious coating on the ceramic substrate. Micro-hardness, porosity, FTIR, SEM, and microstructure of the composite surface were performed. Mechanical properties (hardness test) know that the highest value (88) is obtained at 15 wt % calcium carbonate. In addition, the structure testing results of both SEM and optical microscopy images of the coating revealed good cohesion and uniformity in the distribution of the ceramic powder, indicating that the composite coating structures are dense, compact, coating is around (500 nm) thick while the mean particles size distribute in to (83.01 μm) and (213.67 μm) and do not contain significant porosity value ​​(3.2%) appear at (20 wt.% CaSO4) of carbonate compared to the uncoated sample (18%) .