Long-term correlations distinguish coarsening mechanisms in alloys

Lorenz-Mathias Stadler, Bogdan Sepiol, Richard Weinkamer, Markus Hartmann, Peter Fratzl, Jan W. Kantelhardt, Federico Zontone, Gerhard Grübel, Gero Vogl

    Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

    Abstract

    We determine long-term correlations in the time series of fluctuating x-ray speckle intensities. A fluctuation analysis of small angle x-ray scattering data of the two phase-separating alloys Al-6 at. %Ag and Al-9 at. %Zn at late stages of phase separation reveals long-term correlations that are dramatically different for the two systems. From a comparison with recent Monte Carlo simulations We conclude that two different coarsening mechanisms are predominant in the two alloys-coarsening either by diffusion of single atoms or by movement of whole precipitates.
    OriginalspracheEnglisch
    Aufsatznummer0180101
    Seitenumfang4
    FachzeitschriftPhysical Review B
    Jahrgang68
    Ausgabenummer18
    DOIs
    PublikationsstatusVeröffentlicht - 2003

    ÖFOS 2012

    • 1030 Physik, Astronomie

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