Atomic structure of glassy Mg60Cu30Y10 investigated with EXAFS, x-ray and neutron diffraction, and reverse Monte Carlo simulations

P. Jovari, K. Saksl, Nini Pryds, Bente Lebech, N.P. Bailey, A. Mellergård, R.G. Delaplane, H. Franz

    Research output: Contribution to journalJournal articleResearchpeer-review

    283 Downloads (Pure)

    Abstract

    Short range order of amorphous Mg60Cu30Y10 was investigated by x-ray and neutron diffraction, Cu and Y K-edge x-ray absorption fine structure measurements, and the reverse Monte Carlo simulation technique. We found that Mg-Mg and Mg-Cu nearest neighbor distances are very similar to values found in crystalline Mg2Cu. The Cu-Y coordination number is 1.1 +/- 0.2, and the Cu-Y distance is similar to 4% shorter than the sum of atomic radii, suggesting that attraction between Cu and Y plays an important role in stabilizing the glassy state. Thermal stability and structure evolution upon annealing were also studied by differential scanning calorimetry and in situ x-ray powder diffraction. The alloy shows a glass transition and three crystallization events, the first and dominant one at 456 K corresponding to eutectic crystallization of at least three phases: Mg2Cu and most likely cubic MgY and CuMgY.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Volume76
    Issue number5
    Pages (from-to)054208
    ISSN0163-1829
    DOIs
    Publication statusPublished - 2007

    Bibliographical note

    Copyright 2007 American Physical Society

    Keywords

    • CASTING METHOD
    • LIQUID
    • METALLIC GLASSES
    • BULK AMORPHOUS-ALLOYS

    Fingerprint Dive into the research topics of 'Atomic structure of glassy Mg60Cu30Y10 investigated with EXAFS, x-ray and neutron diffraction, and reverse Monte Carlo simulations'. Together they form a unique fingerprint.

    Cite this