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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

Abstract

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.

Keywords

Edge Length Select Area Electron Diffraction Pattern Alloy Ingot Atomic Displacement Parameter HREM Image 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

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).

References

  1. 1.
    Smontara A, Smiljanić I, Bilušić A, Grushko B, Balanetskyy S, Jagličić Z, Vrtnik S, Dolinšek J (2008) Complex ϵ-phases in the Al–Pd–transition-metal systems: towards a combination of an electrical conductor with a thermal insulator. J Alloys Compd 450:92–102 CrossRefGoogle Scholar
  2. 2.
    Balanetskyy S, Grushko B, Urban K, Velikanova TY (2005) A new rhombic approximant in the Al–Pd–Fe system. Powder Metall Met Ceram 44:282–286 CrossRefGoogle Scholar
  3. 3.
    Balanetskyy S, Grushko B, Velikanova TY (2004) Orthorhombic ϵ-phases and transitional structures in Al–Pd–(Fe). Z Kristallogr 219:548–553 CrossRefGoogle Scholar
  4. 4.
    Balanetskyy S, Grushko B, Velikanova TY, Urban K (2004) An investigation of the Al–Pd–Fe phase diagram between 50 and 100 at.% Al: phase equilibria at 750 C. J Alloys Compd 376:158–164 CrossRefGoogle Scholar
  5. 5.
    Matsuo Y, Hiraga K (1994) The crystal structure of Al3Pd: close relationship to decagonal quasicrystal. Philos Mag Lett 70:155–161 CrossRefGoogle Scholar
  6. 6.
    Boudard M, Klein H, de Boissieu M, Audier M, Vincent H (1996) Mag A 74:939–956 CrossRefGoogle Scholar
  7. 7.
    Hiraga K, Ohsuna T, Kawasaki M (2000) The structure of an Al3Pd-based modulated structure studied by atomic-scale electron microscopy observations. J Electron Microsc 49:729–733 CrossRefGoogle Scholar
  8. 8.
    Li M, Sun J, Oleynikov P, Hovmöller S, Zou X, Grushko B (2010) A complicated quasicrystal approximant ϵ 16 predicted by the strong-reflections approach. Acta Crystallogr, Sect B 66:17–26 CrossRefGoogle Scholar
  9. 9.
    Yurechko M, Grushko B (2000) A study of the Al–Pd–Co alloy system. Mater Sci Eng 294–296:139–142 Google Scholar
  10. 10.
    Yurechko M, Grushko B, Velikanova TY, Urban K (2002) Isothermal sections of the Al–Pd–Co alloy system for 50–100 at.% Al. J Alloys Compd 337:172–181 CrossRefGoogle Scholar
  11. 11.
    Sheldrick GM (2008) A short history of SHELX. Acta Crystallogr, Sect A 64:112–122 CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Institute for Materials ResearchTohoku UniversitySendaiJapan

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