摘要
High entropy alloys (HEAs) have recently attracted considerable interest and attention due to their novel properties of good corrosion resistance and superior mechanical strength at high temperatures. In this study, we investigated the oxidation behavior of a new high entropy alloy, Al 4 Co 3 Cr 25 Cu 10 Fe 25 Ni 33 , by using thermogravimetric analyzer at temperatures ranging from 800 °C to 950 °C under atmosphere of Ar and O 2 for 24 h. The results showed that the oxidation kinetics of Al 4 Co 3 Cr 25 Cu 10 Fe 25 Ni 33 alloy followed a parabolic regime with its rate constant steadily increased with increasing temperature. The activation energy of Al 4 Co 3 Cr 25 Cu 10 Fe 25 Ni 33 alloy was found to be 178 kJ/mol. In addition, the bilayer scales and the internal oxidation behavior at the grain boundaries of Al 4 Co 3 Cr 25 Cu 10 Fe 25 Ni 33 alloy were also examined and discussed.