Structure of ϵ16 Phase in Al–Pd–Co System Studied by HREM and X-Ray Diffraction

  • K. Yubuta
  • S. Suzuki
  • R. Simura
  • K. Sugiyama
Conference paper


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.


Edge Length Select Area Electron Diffraction Pattern Alloy Ingot Atomic Displacement Parameter HREM Image 
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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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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Institute for Materials ResearchTohoku UniversitySendaiJapan

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