Kinetics of isothermal structural relaxation in metallic glasses measured by real-time diffraction using synchrotron radiation

K. Hajlaoui, M. A. Yousfi, I. Ouelhazi, K. Georgarakis, Z. Tourki, G. Vaughan, A. R. Yavari

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    Quantitative measurements of the excess free volume in Pd 40Cu30Ni10P20 and Cu 55Zr30Ti10Pd5metallic glasses during in situ isothermal annealing at various temperatures are used to identify physical parameters of structural relaxation in metallic glasses and to discuss proposed models describing this process. The free-volume model is found to provide a simple and predictive description for structural relaxation phenomena. We show that structural relaxation kinetics follows a second-order law in a satisfactory manner. The activation energy for relaxation is found to depend on annealing temperature and the extent of structural relaxation.

    Original languageEnglish
    Pages (from-to)122-133
    Number of pages12
    JournalPhilosophical Magazine Letters
    Volume91
    Issue number2
    DOIs
    Publication statusPublished - 2011 Feb 1

    Keywords

    • free volume
    • metallic glasses
    • structural relaxation
    • synchrotron radiation
    • X-ray diffraction

    ASJC Scopus subject areas

    • Condensed Matter Physics

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