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

Abstract

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 energyEa ≈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.

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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

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