Effect of Al on oxidation behavior of AlxCrCuFeNi2 (x=0.2, 0.4, 0.6) high entropy alloys

The effect of Al on the oxidation behavior of AlxCrCuFeNi2 (x = 0.2, 0.4, 0.6) high entropy alloys was investi-gated at 700 degrees C in water vapor. The oxidation kinetics of all the alloys followed parabolic behavior, with their oxidation rates decreasing with increasing Al concentration. Thick triplex oxide scales with discontinuous Al2O3 formed on the Al0.2CrCuFeNi2 alloy, while a continuous Al2O3 layer and thinner spinel oxide scale grew on Al0.4CrCuFeNi2 and Al0.6CrCuFeNi2 alloys. The early formation of continuous Al2O3 scale in the initial stage of oxidation contributes to the enhanced oxidation resistance of high Al content alloys.

Automated summary

The effect of Al on the oxidation behavior of high entropy alloys was investigated, and it was found that the oxidation rate of the alloys decreased with increasing Al concentration, resulting in improved oxidation resistance for high Al content alloys.