Structure and hydrogen permeation of Ni-Nb-Zr amorphous alloys

M. Sakurai, S. Yamaura, K. Wakoh, E. Matsubara, A. Inoue

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    9 Citations (Scopus)

    Abstract

    The local structures around Zr atoms in as-quenched and hydrogenated (Ni60Nb40)100-x Zrx (x=30 and 50) amorphous alloys were studied by means of extended x-ray absorption fine structure (EXAFS) and x-ray diffraction. The permeability of the (Ni 60Nb40)100-xZrx amorphous alloys increases with increasing Zr content. The local structure analyses around Zr atoms by EXAFS for the (Ni60Nb40)100-xZr x amorphous alloys show that the inter-atomic distance of Zr-Zr correlation expands from 3.16 to 3.34Å by hydrogenation while there is no change for that Zr-Ni pairs. The similar features are observed in x-ray diffraction analysis. These results indicate that the Zr-Zr bond length is expanded by hydrogen atoms, and hydrogen atoms can easily permeate through these Zr-rich region.

    Original languageEnglish
    Pages (from-to)551-554
    Number of pages4
    JournalJournal of Metastable and Nanocrystalline Materials
    Volume24-25
    DOIs
    Publication statusPublished - 2005 Dec 1

    Keywords

    • Hydrogen permeation
    • Local structure
    • Ni-Nb-Zr amorphous alloy
    • X-ray diffraction
    • XAFS

    ASJC Scopus subject areas

    • Materials Science (miscellaneous)
    • Materials Science(all)
    • Condensed Matter Physics
    • Physical and Theoretical Chemistry

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