Preparation and Characterization of Nano-modification TiB2 Ceramic Particle and Its Reinforced Epoxy Composite coating

Abstract:

Using tetrabutyl titanate as the raw materials, the surface of TiB₂ powders was coated with TiO₂ nanoparticles prepared by the peptization and reflux method at low temperature. The surface morphology, the phase composition of coating layers and specific surface area of composite particles were characterized by SEM, XRD and BET, respectively. The results show that the TiO₂ nanoparticles are coated on the surface of powders uniformly and discretely and the main phase of coating layers is anatase. The surface of TiB₂ powders is rougher after nano-modification and the value of specific surface area of the composite particles is elevated by over 35 times compared with that before coating. Wear-resistant composite coatings are prepared by adding coated TiB₂ powders to epoxy resins. The abrasive loss of composite coatings decreases to 50% of the coatings filled with uncoated TiB₂ powders. Finally, the wear properties, worn surface morphologies and antiwear mechanisms of wear-resistance coatings were analyzed.