The oxidation of an equimolar FeCoNiAl medium-entropy alloy at 900 °C in various oxygen pressures
Source abstract
Abstract
The oxidation of an equimolar FeCoNiAl medium-entropy alloy was studied at 900 °C in various O 2-containing atmospheres over the oxygen pressure range of 10–10 5 Pa. The alloy oxidized parabolically, having its oxidation rates steadily increasing with oxygen pressure. Duplex scales formed on the oxidized substrate, consisting of an outer CoFe 2O 4 layer and an inner α-Al 2O 3 layer. The position of the Pt-marker was located at the outer- and inner-layer boundary, demonstrating that the outward cation diffusion controlled the formation of CoFe 2O 4, while the growth of Al 2O 3 was contributed by the inward oxygen diffusion.
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Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · Advanced materials and composites
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