In this study, the oxidation behavior of AlCoCrFeNi high-entropy alloy powder at 900－1100 °C was first investigated and reported. The triple-phase nanostructure in the early oxidation stage is beneficial to the fast establishment of an exclusive Al₂O₃ scale. The AlCoCrFeNi powder exhibits the extremely low oxidation rate, the fairly high activation energy for oxidation and the relatively low residual stress in Al₂O₃ scale in the temperature range of 900－1100 °C. The outstanding oxidation performance of AlCoCrFeNi powder is attributed to the formation of an exclusive Al₂O₃ scale and the inward O diffusion mechanism.

中文翻译：

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气雾化AlCoCrFeNi高熵合金粉末在900－1100°C下的氧化行为

本研究首先研究并报道了AlCoCrFeNi高熵合金粉末在900 － 1100°C下的氧化行为。早期氧化阶段的三相纳米结构有利于快速建立专有的Al ₂ O ₃氧化皮。AlCoCrFeNi粉末在900 － 1100°C的温度范围内表现出极低的氧化速率，相当高的氧化活化能和相对较低的Al ₂ O ₃垢残余应力。AlCoCrFeNi粉末出色的氧化性能归因于独特的Al ₂ O ₃氧化皮的形成和向内O扩散机制。