Phase transformation and diffusion in high-temperature oxidation of FeCrNi medium entropy alloy
Source abstract
Abstract
The oxidation of the FeCrNi medium entropy alloy is investigated from 700 to 1000 °C by combining experimental observations with density functional theory (DFT) calculations. The sole oxidation product formed is Cr 2O 3. At 900 °C, the layer exhibits desirable density and continuity, attributed to the rapid diffusion of Cr facilitated by the body-centered cubic phase transformation. There is a significant increase in mass gain rates at 1000 °C, accompanied by the formation of a discontinuous Cr 2O 3 layer and penetration of oxide. These observations emphasize the significant roles of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
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Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · High Temperature Alloys and Creep
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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