As an important precipitate in Zr-alloy, detailed study on the oxidation behavior of Zr(Fe,Nb)2 in atomic scale will help to develop safer materials for reactors. In this study, Zr(Fe,Nb)2 intermetallic was fabricated and exposed to subcritical water (320 °C, 15.5 MPa). On oxidation frontier, the interplay between element diffusion and structure evolution was analyzed. The oxidation process started with the incorporation of oxygen in local strips, which was perpendicular to the direction of oxygen diffusion. Fe was segregated from the oxygen-rich strips via an uphill diffusion process along {001} lattice plane. The “spinodal decomposition”-like phenomenon was observed and discussed.

中文翻译：

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亚临界环境下Zr(Fe,Nb)2氧化过程中“Spinodal分解”样结构的演变

作为 Zr 合金中的重要沉淀物，详细研究 Zr(Fe,Nb)2 在原子尺度上的氧化行为将有助于开发更安全的反应堆材料。在本研究中，制备了 Zr(Fe,Nb)2 金属间化合物并暴露于亚临界水 (320 °C, 15.5 MPa)。在氧化前沿，分析了元素扩散和结构演化之间的相互作用。氧化过程开始于将氧掺入与氧扩散方向垂直的局部条带中。Fe 通过沿 {001} 晶格平面的向上扩散过程从富氧条中分离出来。观察和讨论了“旋节分解”样现象。