Surface Modification of Silicon Carbide Powder by nano-TiO_2 and Its Application in Wear-resistant Coatings

摘要

By using butyl titanate as the main material, the nano-TiO_2/μm-SiC composite particles were prepared in acidic abundant aqueous solution at low temperature. The properties of the composite particles, including surface morphology, the phase composition of the coating layer, were characterized by SEM, XRD and XPS. The results show that the surfaces of composite particles were rougher after nano-TiO_2 coating. Compared with uncoated powders as filler, the weight loss of composite coatings decreased by 43%, when the composite particles were filled in wear-resistant coatings based on the silicone modified epoxy resins.