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Journal of Applied Electrochemistry

, Volume 24, Issue 2, pp 131–138 | Cite as

Local structure and concentration in Al-Mn alloy electrodeposits

  • T. Takayama
  • H. Seto
  • J. Uchida
  • S. Hinotani
Papers

Abstract

The structures of f.c.c. crystalline and amorphous phases coexisting in Al-Mn alloy electrodeposits containing 11–30 wt% were examined by using the grazing-incidence X-ray diffraction (GIXD) method, high-resolution transmission electron microscopy combined with energy dispersive X-ray spectrometry (HRTEM/EDS), and the manganese K-edge extended X-ray absorption fine-structure (EXAFS) technique. The amorphous and f.c.c. phases were homogeneously distributed in the through-thickness direction of the electrodeposits, although the amorphous phase increased and the f.c.c. phase decreased with increasing manganese total concentration. The decrease of Mn-content in the f.c.c. crystalline phases with increasing manganese total concentration was revealed by the lattice constant measurement of the f.c.c. crystalline phase. This result was also supported by the microarea elemental analysis by HRTEM/EDS. The EXAFS result has indicated that the manganese local structures in the amorphous phases are almost identical in different manganese total concentration electrodeposits. This suggests that the Mn-content in the amorphous phases hardly changes with increasing manganese total concentration. These results have revealed that a peculiar elemental partition occurs in the amorphous and crystalline phases of Al-Mn alloy electrodeposits.

Keywords

Manganese Crystalline Phasis Amorphous Phase Local Structure Elemental Partition 
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.

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References

  1. [1]
    A. Sadoc, A. M. Flank and P. Lagarde, Physica B 158 (1989) 60.Google Scholar
  2. [2]
    A. Sadoc and J. M. Dubois, J. Phys., Condens. Matter 1 (1989) 4283.Google Scholar
  3. [3]
    K. Masui, H. Nakamoto, S. Maruno, T. Kawaguchi and S. Sakakibara, J. Non-Cryst. Solids 124 (1990) 121.Google Scholar
  4. [4]
    G. R. Stafford and B. Grushko, 176th Electrochem. Soc. Meeting (1989) 363.Google Scholar
  5. [5]
    B. Grushko and G. R. Stafford, Scripta Metall. 23 (1989) 557.Google Scholar
  6. [6]
    B. Grushko and G. R. Stafford, Metall. Trans. A 21 (1990) 2869.Google Scholar
  7. [7]
    B. Grushko and G. R. Stafford, Scripta Metall. 23 (1989) 1043.Google Scholar
  8. [8]
    M. Hansen, ‘Constitution of Binary Alloys’, McGraw-Hill, New York (1958) 111.Google Scholar
  9. [9]
    T. Tsuda, H. Seto, J. Uchida, Y. Yamamoto, N. Usuki, T. Shiota, A. Shibuya and R. Noumi, SAE '90 Congress (1990) 900719.Google Scholar
  10. [10]
    Y. Yamamoto, H. Seto, J. Uchida, T. Tsuda, A. Shibuya, R. Noumi, S. Fujita, T. Taguchi, J. Yoneda and K. Yanagi, AESF 6th Continuous Strip Plating Symposium (1990).Google Scholar
  11. [11]
    T. Takayama and Y. Matsumoto, Adv. X-ray Anal. 33 (1990) 109.Google Scholar
  12. [12]
    B. K. Teo, ‘EXAFS: Basic Principle and Data Analysis’, Springer-Verlag, New York (1986) 114.Google Scholar
  13. [13]
    T. Tanaka, Y. Nishimura, S. Kawasaki, T. Funabiki and S. Yoshida, J. Chem. Soc., Chem. Comm. (1987) 506.Google Scholar
  14. [14]
    S. Yoshida and T. Tanaka, Adv. X-ray Chem. Anal. Japan 19 (1988) 97.Google Scholar
  15. [15]
    T. Takayama and Y. Matsumoto, Bunseki Kagaku, Japan 38 (1989) 500.Google Scholar
  16. [16]
    M. Benfatto, C. R. Natoli, A. Bianconi, J. Garcia, A. Marcelli, M. Fanfoni and I. Davoli, Phys. Rev. B 34 (1986) 5774.Google Scholar
  17. [17]
    T. Miyanaga, N. Matsubayashi, I. Watanabe and S. Ikeda, Adv. X-ray Chem. Anal. Japan 19 (1988) 119.Google Scholar
  18. [18]
    A. D. I. Nicol, Acta Crystallogr. 6 (1953) 285.Google Scholar
  19. [19]
    W. B. Pearson, ‘A Handbook of Lattice Spacings and Structures of Metals and Alloys’, Pergamon Press, Oxford (1967) 574.Google Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • T. Takayama
    • 1
  • H. Seto
    • 1
  • J. Uchida
    • 1
  • S. Hinotani
    • 1
  1. 1.Iron and Steel Research LaboratoriesSumitomo Metal Industries LtdHyogoJapan

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