Fine structure of zr80Pt20 amorphous alloy determined from anomalous X-ray scattering (AXS) data by applying reverse monte-carlo (RMC) simulation method

Research output: Contribution to journalArticlepeer-review

Abstract

The fine structure of a Zr80Pt20 amorphous alloy was evaluated by anomalous X-ray scattering (AXS) coupled with reverse Monte Carlo (RMC) simulation. Featureless short-range ordered structures were preferentially formed by the Zr component, similar to those described by dense random packing (DRP), while the Pt atoms adopted a somewhat different structure. The Pt atoms adopted Zr-rich coordination and an icosahedral local atomic arrangement, in unique chemical short-range ordering (CSRO) as well as topological short-range ordering (TSRO). The present AXS-RMC analysis also suggested that the pre-peak signal at 17 nm11 in the X-ray diffraction profile was largely attributed to the correlation between the PtPt pair with a separation of approximately 0.40.5 nm. The geometrical and chemical features of the common neighbors of the middle-range PtPt pairs indicate the unique CSRO and TSRO, where both chemical and density fluctuations were observed in two distinct regions: a Zr-rich region with high packing density and a Pt-rich region with low packing density.

Original languageEnglish
Pages (from-to)20-26
Number of pages7
JournalMaterials Transactions
Volume62
Issue number1
DOIs
Publication statusPublished - 2021 Jan 1

Keywords

  • Amorphous alloy
  • Anomalous X-ray scattering
  • Medium range ordering
  • Metallic glass
  • Reverse Monte-Carlo simulation
  • Structural study

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Fine structure of zr<sub>80</sub>Pt<sub>20</sub> amorphous alloy determined from anomalous X-ray scattering (AXS) data by applying reverse monte-carlo (RMC) simulation method'. Together they form a unique fingerprint.

Cite this