The effects of atmosphere (oxygen and steam) and reactive element addition (Zr and Y) on high-temperature oxidation behavior of Al_0.5CrFeNiMn and Al_0.5CrFeNiCo high-entropy alloys at 1000 °C and 1200 °C were studied. The Al_0.5CrFeNiMn alloy displayed different oxidation mechanisms in oxygen and steam owing to differing oxygen partial pressures and preferential oxidation of Mn. A protective alumina scale established on Al_0.5CrFeNiCo alloy in both atmospheres and the beneficial effects of Y addition are seen by remarkably improved oxide scale adherence and suppression of convoluted oxide scale morphology. However, doping with 1 wt% Zr deteriorates the oxidation resistance with substantial Al+Zr internal oxidation.

研究了气氛（氧气和蒸汽）和活性元素添加（Zr和Y）对Al _0.5 CrFeNiMn和Al _0.5 CrFeNiCo高熵合金在1000℃和1200℃高温氧化行为的影响。由于不同的氧分压和 Mn 的优先氧化，Al _0.5 CrFeNiMn 合金在氧气和蒸汽中表现出不同的氧化机制。在两种气氛中在 Al _0.5 CrFeNiCo 合金上建立的保护性氧化铝氧化皮和添加 Y 的有益效果可以通过显着改善氧化皮粘附和抑制复杂的氧化皮形态来观察。然而，掺杂 1 wt% Zr 会降低抗氧化性，并伴有大量的 Al+Zr 内部氧化。