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 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.
Similar content being viewed by others
References
G.L. Krasko, Phys. Rev. B36 (1984) 8565.
V.L. Moruzzi, P.M. Marcus, K. Schwarz and P. Mohn, Phys. Rev. B34 (1986) 1784.
J. Hesse, Hyp. Int. 47 (1989) 357.
D.G. Rancourt, S. Chehab and A. Lemarche, J. Magn. Magn. Mater. 78 (1989) in press.
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.
S.J. Campbell and G.L. Whittle, Hyp. Int. 41 (1988) 551.
D.K.-H. Finkler, T. Heck, A.E. Maurer, S.J. Campbell and U. Gonser, J. Mater. Science 23 (1988) 3480.
G. Dumpich, E. Becker, K. Schletz, W. Stamm, W. Keune, W. Kianka and S. Murayama, J. Magn. Magn. Mater. 74 (1988) 237.
D.K.-H. Finkler, S.J. Campbell, J. Ferreirinho, G.H.J. Wantenaar and U. Gonser, J. Magn. Magn. Mater. 79 (1989) in press.
R. Borrelly, J.M. Pelletier and E. Pernoux, Scripta Met. 9 (1975) 747.
D.K.-H. Finkler, A.E. Maurer, S.J. Campbell, T. Heck and U. Gonser, Physica 145B (1987) 335.
P. Haasen, ‘Physikalische Metallkunde’ (Springer, Berlin, 1974) p. 178.
P.G. Shewmon, ‘Diffusion in Solids’ (McGraw-Hill, New York, 1963) p. 40.
J. Klein, S.J. Campbell, F. Aubertin, U. Gonser and O. Schneeweiss(1989) in preparation.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Klein, J., Heck, T., Campbell, S.J. et al. The activation energy for γ-Fe precipitates inCuFe. Hyperfine Interact 54, 811–816 (1990). https://doi.org/10.1007/BF02396133
Issue Date:
DOI: https://doi.org/10.1007/BF02396133