This paper reports microstructure associated with the L1 and L1 two-phase coexistence region in magnetic Fe-Pd alloys and analyzes the observed complex nanometer scale wetting layer structures. Fe - 61.8 at% Pd samples were continuously cooled from the disordered A1 phase through the eutectoid isotherm and aged at 650 °C for various times. X-ray diffraction reveals that the samples first order to L1 then transform to L1-dominant L1 + L1 two-phase mixture. It is shown that L1 forms {110} polytwin microstructure with straight antiphase boundaries (APBs), where L1 exists as nanometer-scale wetting layers along the twin boundaries and APBs. The variant selection for L1/L1 wetting layers is discussed, and evidence of closed/open APB structures is shown with high-resolution transmission electron microscopy.

中文翻译：

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Fe-Pd 合金中纳米级 L12 对 L10 孪晶和反相边界的润湿

本文报道了磁性 Fe-Pd 合金中与 L1 和 L1 两相共存区域相关的微观结构，并分析了观察到的复杂纳米级润湿层结构。 Fe - 61.8 at% Pd 样品从无序 A1 相通过共析等温线连续冷却，并在 650 °C 下老化不同时间。 X 射线衍射表明，样品首先排列为 L1，然后转变为以 L1 为主的 L1 + L1 两相混合物。结果表明，L1 形成具有直反相边界 (APB) 的 {110} 多孪晶微观结构，其中 L1 作为沿孪晶边界和 APB 的纳米级润湿层存在。讨论了 L1/L1 润湿层的变体选择，并通过高分辨率透射电子显微镜显示了闭合/开放 APB 结构的证据。