Structural study of amorphous FE70M10B20 (M = CR, W, NB, ZR and HF) alloys by X-ray diffraction

T. Nakamura, E. Matsubara, M. Imafuku, H. Koshiba, A. Inoue, Y. Waseda

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    21 Citations (Scopus)

    Abstract

    Local atomic structures in amorphous Fe70M10B20 (M = Cr, W, Nb, Zr and Hf) alloys with different ΔTx values were studied by the ordinary X-ray diffraction, anomalous X-ray scattering and EXAFS methods. Their local the atomic structures basically resemble each other, i.e. a random network structure of triangular prisms. Only difference in local atomic structure is a shape of the local structural unit. In the amorphous alloys containing M elements larger than Fe atoms, the prisms show distorted shapes due to a size difference Δr between M and Fe. A linear relation between Δr and ΔTx, and a comparison of their crystallization processes suggest us that their thermal stability is attributed to difficulty in rearranging the irregular structural units because of a non-zero Δr value.

    Original languageEnglish
    Pages (from-to)1530-1534
    Number of pages5
    JournalMaterials Transactions
    Volume42
    Issue number8
    DOIs
    Publication statusPublished - 2001

    Keywords

    • Anomalous X-ray scattering method
    • Crystallization
    • Extended X-ray absorption fine structure (EXAFS) local atomic structure
    • Iron-based bulk amorphous alloy
    • Thermal stability

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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