Hyperfine Interactions

, Volume 54, Issue 1–4, pp 811–816 | Cite as

The activation energy for γ-Fe precipitates inCuFe

  • J. Klein
  • T. Heck
  • S. J. Campbell
  • F. Aubertin
  • U. Gonser
Metals and Alloys


The precipitation of the fcc γ-phase of iron has been studied by a systematic series of isothermal and isochronal (0–48 h) heat treatments (300–800°C) on a supersaturated solution ofCuFe containing 3 at% Fe. The optimal conditions (450–600°C) for precipitation of the maximum fraction (90%) of iron attainable within 48 h in the form of γ-Fe have been delineated from analysis of the room temperature spectra. The time dependence for formation of γ-Fe precipitates is well described by the equation for long term annealing. An activation energyE a ≈0.6 eV for the formation of γ-Fe in Cu is obtained. It indicates short range rather than long range diffusion in theCuFe sample studied.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    G.L. Krasko, Phys. Rev. B36 (1984) 8565.CrossRefADSGoogle Scholar
  2. [2]
    V.L. Moruzzi, P.M. Marcus, K. Schwarz and P. Mohn, Phys. Rev. B34 (1986) 1784.CrossRefADSGoogle Scholar
  3. [3]
    J. Hesse, Hyp. Int. 47 (1989) 357.CrossRefGoogle Scholar
  4. [4]
    D.G. Rancourt, S. Chehab and A. Lemarche, J. Magn. Magn. Mater. 78 (1989) in press.Google Scholar
  5. [5]
    Y. Tsunoda, N. Kunitomi and R.M. Nicklow, J. Phys. F: Met. Phys. 17 (1984) 2447; Y. Tsunoda and N. Kunitomi, J. Phys. F: Met. Phys. 18 (1988) 1405; Y. Tsunoda, S. Imada and N. Kunitomi, J. Phys. F: Met. Phys. 18 (1988) 1421.CrossRefADSGoogle Scholar
  6. [6]
    S.J. Campbell and G.L. Whittle, Hyp. Int. 41 (1988) 551.Google Scholar
  7. [7]
    D.K.-H. Finkler, T. Heck, A.E. Maurer, S.J. Campbell and U. Gonser, J. Mater. Science 23 (1988) 3480.CrossRefGoogle Scholar
  8. [8]
    G. Dumpich, E. Becker, K. Schletz, W. Stamm, W. Keune, W. Kianka and S. Murayama, J. Magn. Magn. Mater. 74 (1988) 237.CrossRefADSGoogle Scholar
  9. [9]
    D.K.-H. Finkler, S.J. Campbell, J. Ferreirinho, G.H.J. Wantenaar and U. Gonser, J. Magn. Magn. Mater. 79 (1989) in press.Google Scholar
  10. [10]
    R. Borrelly, J.M. Pelletier and E. Pernoux, Scripta Met. 9 (1975) 747.CrossRefGoogle Scholar
  11. [11]
    D.K.-H. Finkler, A.E. Maurer, S.J. Campbell, T. Heck and U. Gonser, Physica 145B (1987) 335.Google Scholar
  12. [12]
    P. Haasen, ‘Physikalische Metallkunde’ (Springer, Berlin, 1974) p. 178.Google Scholar
  13. [13]
    P.G. Shewmon, ‘Diffusion in Solids’ (McGraw-Hill, New York, 1963) p. 40.Google Scholar
  14. [14]
    J. Klein, S.J. Campbell, F. Aubertin, U. Gonser and O. Schneeweiss(1989) in preparation.Google Scholar

Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1990

Authors and Affiliations

  • J. Klein
    • 1
  • T. Heck
    • 1
  • S. J. Campbell
    • 2
  • F. Aubertin
    • 1
  • U. Gonser
    • 1
  1. 1.Fachbereich 12.1Universität des SaarlandesSaarbrückenF.R. Germany
  2. 2.Department of PhysicsUniversity College, University of New South Wales, ADFACanberraAustralia

Personalised recommendations