Isolating intermediate Mg11Cu6Al12 phase in ternary Mg-Cu-Al alloy by electrolytic dealloying
Isolating intermediate Mg11Cu6Al12 phase in ternary Mg-Cu-Al alloy by electrolytic dealloying
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DOI：
10.1016/j.scriptamat.2022.115039
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发表时间：
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影响因子：
6
通讯作者：
Timothy Lee;Jintao Fu;Lin Wang;Jiaxin Liu;Samuel S. Welborn;J. Weker;E. Detsi
中科院分区：
文献类型：
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作者：
Timothy Lee;Jintao Fu;Lin Wang;Jiaxin Liu;Samuel S. Welborn;J. Weker;E. Detsi
虽然脱合金被广泛用于制造纳米多孔材料，但它很少用于分离难以合成的中间相。在这里，我们展示了如何在室温下无空气，电解脱合金可以用来隔离三元金属间化合物Mg 11 Cu 6Al 12相。我们创建了一个三元Mg-Cu-Al母合金包含Mg 11 Cu 6Al 12化合物和其他相，然后通过电解去合金化去除这些其他相，以分离Mg 11 Cu 6Al 12相。孤立的Mg 11 Cu 6Al 12相呈直径约为1 μm的棒状组织。使用各种技术进行的相和化学分析，包括电感耦合等离子体和基于实验室和同步加速器的X射线衍射，显示出最小的杂质。这种分离Mg 11 Cu 6Al 12相的新方法可以在基础研究中发挥作用，并可应用于其他难以合成的金属间化合物。
While dealloying is widely used to create nanoporous materials, it has rarely been employed to isolate difficult-to-synthesize intermediate phases. Here we show how air-free, electrolytic dealloying at room temperature can be used to isolate the ternary intermetallic Mg11Cu6Al12phase. We create a ternary Mg-Cu-Al parent alloy containing the Mg11Cu6Al12compound and other phases, then subsequently remove these other phases via electrolytic dealloying to isolate the Mg11Cu6Al12phase. Isolated Mg11Cu6Al12phase exhibits ≈1 μm diameter rod-shaped microstructure. Phase and chemical analysis conducted using various techniques, including inductively coupled plasma and lab and synchrotron-based X-ray diffraction, show minimal impurities. This new approach to isolate the Mg11Cu6Al12phase can unlock its use in fundamental research and can be applied to other difficult-to-synthesize intermetallic compounds.