Structure of ϵ16 Phase in Al–Pd–Co System Studied by HREM and X-Ray Diffraction
A variety of orthorhombic approximant ϵ n (n=6, 16, 22, and 28)-phases exist in Al–Pd–(Mn, Fe, Co, Rh) systems. HREM images and the corresponding electron diffraction patterns show that the ϵ 16 phase in an annealed Al80Pd11Co9 alloy exhibits a locally disordered structure consisting of pentagonal and banana-shaped tiles with an edge length of 0.76 nm. This paper demonstrates a feasible structural model for the ϵ 16 phase in the Al–Pd–Co system by single-crystal X-ray diffraction coupled with HREM.
KeywordsEdge Length Select Area Electron Diffraction Pattern Alloy Ingot Atomic Displacement Parameter HREM Image
A part of this work was supported by a Grant-in-Aid for Challenging Exploratory Research (22656152) from the Japan Society for the Promotion of Science (JSPS).
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