Effect of Refractory Ceramic Coating on the Thermal Oxidation Resistance of Inconel 617 Alloy

摘要

Effect of ceramic coating (TiN, TiCN, TiAlN or Al{sub}2O{sub}3) on the wear resistance and thermal oxidation behavior of Inconel 617 alloy (Ni-22Cr-12.5Co-9Mo-1Al) have been examined. TiAlN and Al{sub}2O{sub}3 coatings showed lower wear loss than bare Inconel 617 and the enhanced thermal oxidation resistance at 1000°C by suppressing the inhomogeneous formation of Cr{sub}2O{sub}3 at the surface region through the reaction between oxygen and grain boundary-diffused Cr, one of the main component of Inconel 617 alloy, while TiN and TiCN coatings showed poor temperature stability at the temperature region above 600°C.