High temperature oxidation kinetics of Fe-10Al-4Cr-4Y2O3 ODS alloy at 1200–1400 °C

The high temperature oxidation kinetics of the Fe-10Al-4Cr-4Y2O3 ODS alloy (FeAlOY) with excellent creep and oxidation resistance at temperatures exceeding 1100 °C is investigated at 1200 °C, 1300 °C and 1400 °C. A compact layer with columnar grain microstructure consisting of α-Al2O3 and YAG (Y3Al5O12) grains is grown at the surface. The oxidation resistance of FeAlOY is compared with other Fe-Cr-Al alloys. The oxidation mechanism and roles of individual elements in the FeAlOY are discussed in detail. Despite containing 3–4 times less Cr, the FeAlOY has the same or even better oxidation resistance when compared with classical Fe-Cr-Al alloys.