Inhomogeneity of local packing density and atomic bonding of Ni67Zr33 amorphous alloy

K. Itoh, J. Saida, T. Otomo

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Pulsed neutron diffraction and synchrotron X-ray diffraction measurements were performed on a melt-quenching Ni67Zr33 amorphous alloy sample. The Ni-Ni, Ni-Zr and Zr-Zr nearest neighbour distributions were obtained from differences in the scattering intensities between the two probes in conjunction with the Gaussian fitting. The results demonstrate that the Ni-Zr and Zr-Zr nearest neighbour distributions are respectively represented by single Gaussian peaks but the Ni-Ni one is an asymmetric shape. Three-dimensional structure models were constructed by using reverse Monte Carlo (RMC) modelling method with fitting to the neutron and X-ray diffraction data sets. The Voronoi-Delaunay method was used on the RMC configurations to investigate the local packing properties of each coordination cluster. With reference to the macroscopic packing fraction, inhomogeneous structural feature arising from dense and loose packing domains is observed in the structure of Ni67Zr33 amorphous alloy.

Original languageEnglish
Pages (from-to)585-592
Number of pages8
JournalJournal of Alloys and Compounds
Volume732
DOIs
Publication statusPublished - 2018 Jan 25

Keywords

  • Amorphous materials
  • Atomic scale structure
  • Neutron diffraction
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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