The impacts of thermal treatment on the precipitate morphology and oxidation behavior of a dual-phase (FCC + L1₂) multi-principal element alloy (MPEA), Ni₄₅Co₁₇Cr₁₄Fe₁₂Al₇Ti₅, was studied at 1000 °C via isothermal and cyclic testing. Thermogravimetric analysis and subsequent characterization revealed that smaller precipitates had an increased capacity to form protective sub-surface oxide layers which mitigated total mass gain. The smaller-precipitate-containing samples exhibited a decrease in thickness of the primary Cr₂O₃ scale and parabolic growth rate. Mechanistically this behavior is believed to stem from the increased growth rate of initial Al₂O₃ nuclei and decreased inter-precipitate spacing which results in faster lateral diffusion and agglomeration.

研究了在 1000 ° 下热处理对双相 (FCC + L1 ₂ ) 多主元素合金 (MPEA) Ni ₄₅ Co ₁₇ Cr ₁₄ Fe ₁₂ Al ₇ Ti ₅的析出物形态和氧化行为的影响C 通过等温和循环测试。热重分析和随后的表征表明，较小的沉淀物形成保护性次表面氧化层的能力增加，从而减轻了总质量增加。含有较小沉淀物的样品表现出初生Cr ₂ O ₃氧化皮厚度和抛物线生长速率的减小。从机制上讲，这种行为被认为源于初始Al ₂ O ₃核生长速率的增加和沉淀间间距的减小，这导致更快的横向扩散和团聚。