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Theoretical and Mathematical Physics

, Volume 145, Issue 2, pp 1590–1603 | Cite as

Three Regimes of Diffusion Migration of Hydrogen Atoms in Metals

  • Yu. A. Kashlev
Article

Abstract

The classical diffusion theory cannot explain the temperature kink of the activation energy and the anomalous isotopic effect observed in the hydrogen atom migration in BCC metals. We present a theory based on the equations of quantum statistical mechanics that permits interpreting both these phenomena completely. We consider three possible mechanisms for an elementary act of hydrogen diffusion in metals: the over-barrier hopping, the thermally activated tunnel transition, and the tunneling due to decay of a local deformation near the hydrogen atom.

Keywords

quantum statistical mechanics hydrogen atom metal diffusion atom jump tunneling activation energy 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Yu. A. Kashlev
    • 1
  1. 1.Baikov Institute for Metallurgy and Materials ScienceRASMoscowRussia

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