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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20 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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