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Metallurgist

, Volume 54, Issue 5–6, pp 353–357 | Cite as

Crystallographic aspects of iron-graphite composite homogenization

  • T. A. Litvinova
  • S. N. Egorov
  • Yu. Yu. Medvedev
Article

Diffusion of carbon atoms (ions) in an iron matrix based on crystallography is considered. Structures are determined for a chemisorbed carbon layer and its concentration. The carbon diffusion coefficient in γ-Fe during electrocontact compaction is calculated. The elementary act of C+n movement into neighboring iron octahedral interstices is considered as a basic homogenization mechanism. Intensification of C diffusion in γ-Fe is explained by the effect of an external electric field on the degree of carbon atom ionization in the iron crystal lattice interstices.

Key words

crystallographic adsorption center volumetric diffusion chemisorbed layer degree of ionization octahedral interstice 

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References

  1. 1.
    S. N. Egorov and M. S. Egorov, New Hot-Workable Powder Low-Alloy Steels [in Russian], YuRGTU (NPI), Novocherkassk (2008).Google Scholar
  2. 2.
    Yu. Yu. Medvedev, “Forming of powder materials with electroplastic compaction,” Diss. Cand. Tech. Sci., Novocherkassk (2003).Google Scholar
  3. 3.
    A. A. Metsler, “Structure and properties of powder bronzes molded with electrocontact compaction,” Author’s Abstr. Diss. Cand. Tech. Sci., Novocherkassk (2007).Google Scholar
  4. 4.
    T. A. Litvinova and S. N. Egorov, “Forming of powder steel under conditions of electrocontact compaction,” Izv. Vyssh. Uchebn. Zaved., Poroshkovaya Metallurgiya i Funktsionalnye Pokrytiya, No. 2, 32.34 (2009).Google Scholar
  5. 5.
    S. N. Egorov, B. M. Somoleiskii, and M. S. Egorov, “Structure of a chemisorbed layer of oxygen on the surface of metals of cubic syngony,” Izv. Vyssh. Uchebn. Zaved., Sev.-Kavk. Region. Tekh. Nauki, No. 3, 77–80 (1999).Google Scholar
  6. 6.
    L. Pauling, General Chemistry [Russian translation], Khimiya, Moscow (1974).Google Scholar
  7. 7.
    V. K. Grigorovich, Electron Structure and Thermodynamics of Iron Alloys [in Russian], Nauka, Moscow (1970).Google Scholar
  8. 8.
    I. M. Stroiman, Cold Welding of Metals, [in Russian], Mashinostroenie, Moscow (1985).Google Scholar
  9. 9.
    A. Van Fleck, Theoretical and Applied Material Science [Russian translation], Atomizdat, Moscow (1975).Google Scholar
  10. 10.
    S. D. Gertsilen and I. Ya. Dekhtyar, Diffusion in Metals and Alloys in the Solid Phase [in Russian], Gos. Izd. Fiz.-Mat. Literatury, Moscow (1961).Google Scholar
  11. 11.
    M. A. Krishtal, Mechanism of Diffusion in Iron Alloys [in Russian], Metallurgiya, Moscow (1972).Google Scholar
  12. 12.
    M. Paschlce and A. Hauttman, Arch. Eisenhüttenw., 9, 305 (1935).Google Scholar
  13. 13.
    V. G. Gasanov, Mutual Diffusion and Homogenization in Powder Alloys [in Russian],YuRGTU, Novocherkassk (2002).Google Scholar
  14. 14.
    V. A. Rabinovich and Z. Ya. Khavin, Short Chemical Handbook [in Russian], Khimiya, Moscow (1977).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2010

Authors and Affiliations

  • T. A. Litvinova
    • 1
  • S. N. Egorov
    • 1
  • Yu. Yu. Medvedev
    • 1
  1. 1.Volgodonsk Institute of South Russia Technical UniversityVolgodonskRussia

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