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Icosahedral Quasicrystal Layer Observed on λ Phase in Al-Cu-Fe Alloy

机译：在Al-Cu-Fe合金中观察到λ相的icosaheDral拟rδ

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Icosahedral quasicrystals display irregular shape if it is embedded in bulk material. If it has free surface, it has well-defined facets, reflecting its unique 5-, 3-, and 2-fold rotational symmetries. In this study, an Al-Cu-Fe alloy with nominal composition of Al65Cu20Fe15 was prepared by arc melting and the microstructure was studied by using Scanning Electron Microscope, Energy Dispersive X-ray Spectroscopy, and Electron Back Scattering Diffraction (EBSD). On the surface of λ crystalline phase, an extra layer is found. EBSD from this layer revealed 5-, 3-, and 2-fold rotational symmetries, demonstrating the icosahedral quasicrystalline structure. Further, it has been found that the icosahedral quasicrystalline extra layer and the λ substrate have orientation relationship revealed by the coincidences of Kikuchi bands and poles on the EBSD patterns. This report is important to future studies regarding the formation of icosahedral quasicrystalline phase and thin film preparation related to icosahedral quasicrystalline phase.
机译：ICOSAHEDRAL Quasicrystals如果嵌入散装材料，则表示不规则的形状。如果它具有自由表面，它具有明确定义的面部，反映其独特的5-，3-和2倍的旋转对称。在该研究中，通过弧熔化制备具有标称组合物的Al-Cu-Fe合金，通过使用扫描电子显微镜，能量分散X射线光谱和电子背散射衍射（EBSD）来研究微观结构。在λ结晶相的表面上，找到额外的层。来自该层的EBSD显示了5-，3-和2倍的旋转对称，展示了ICOSAHEDRAL Quasicrystalline结构。此外，已经发现ICosaheDral QuasiCrystalline额外层和λ衬底具有通过EBSD图案上的kikuchi带和极杆的巧合透露的取向关系。本报告对未来的研究对拟索二胱替代术相和薄膜制剂的形成至关重要，与ICOSAHEDRAL Quasicrystalline相。

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