Characterization of oxide scales to evaluate high temperature oxidation behavior of Ti(C,N)-based cermets in static air

▶ Oxide scales formed consisted of NiO outerlayer, NiTiO3 interlayer and TiO2-based innerlayer. ▶ Transition layers formed consisted of Ti-, Ni- and Mo-based oxides. ▶ Oxidation process was mainly controlled by O inward thermodynamic activity. ▶ Cermet with Ni-20Cr binder exhibited better oxidation resistance, due to the richness of Cr in binder and rim phases. ▶ Cr was completely and incompletely oxidized to form Cr0.17Mo0.83O2 and Cr-rich Ti-based oxides, respectively, thus decreasing O inward thermodynamic activity.