An effective way to solve the abnormal oxidation behavior of Fe in Ti(C,N)-304ss cermet

Abstract WC and TiB 2 were added into Ti(C,N)-304ss cermet to relieve an abnormal oxidation behavior of Fe in this cermet. During high-temperature oxidation (650 °C), the volume swelling of WO 3 eliminated the gap led by the volume shrinkage of TiO 2 . Liquid B 2 O 3 covered the oxidation surface or filled in cracks, forming a dense oxidation layer. As a result, the abnormal oxidation behavior was relieved. The oxidation mechanism was investigated using FESEM, XRD, LSCM, and AFM. Fe atoms outward diffused to the surface along with the TiO 2 /304ss boundary forming ring-structure oxide and across the TiO 2 generating aggregated oxide on TiO 2 surface.