Metallurgical and Materials Transactions A

, Volume 39, Issue 8, pp 1908–1916

Structure of ZrxPt100−x (73 ≤ x ≤ 77) Metallic Glasses

Authors

    • Materials and Engineering Physics ProgramAmes Laboratory (USDOE), Iowa State University
  • R.T. Ott
    • Materials and Engineering Physics ProgramAmes Laboratory (USDOE), Iowa State University
  • M.Z. Li
    • Materials and Engineering Physics ProgramAmes Laboratory (USDOE), Iowa State University
    • Condensed Matter Physics ProgramAmes Laboratory (USDOE), Iowa State University
  • S.Y. Wang
    • Condensed Matter Physics ProgramAmes Laboratory (USDOE), Iowa State University
    • Department of Optical Science and Engineering, State Key Laboratory for Advanced Photonic Materials and DevicesFudan University
  • C.Z. Wang
    • Materials and Engineering Physics ProgramAmes Laboratory (USDOE), Iowa State University
    • Condensed Matter Physics ProgramAmes Laboratory (USDOE), Iowa State University
  • M.F. Besser
    • Materials and Engineering Physics ProgramAmes Laboratory (USDOE), Iowa State University
  • A.C.Y. Liu
    • Materials Science DivisionArgonne National Laboratory
  • M.J. Kramer
    • Materials and Engineering Physics ProgramAmes Laboratory (USDOE), Iowa State University
    • Department of Materials Science and EngineeringIowa State University
Symposium: Bulk Metallic Glasses IV

DOI: 10.1007/s11661-007-9335-y

Cite this article as:
Sordelet, D., Ott, R., Li, M. et al. Metall and Mat Trans A (2008) 39: 1908. doi:10.1007/s11661-007-9335-y

Abstract

The structure of hyper-eutectic ZrxPt100−x (73 ≤ x ≤ 77) metallic glasses produced by melt spinning was examined with high-energy synchrotron X-ray diffraction (HEXRD) and fluctuation electron microscopy. In addition, details of the amorphous structure were studied by combining ab initio molecular dynamics and reverse Monte Carlo simulations. Crystallization pathways in these glasses have been reported to vary dramatically with small changes in compositions; however, in the current study, the structures of the different glasses were also observed to vary with composition, particularly the prepeak in the total structure factor that occurs at a Q value of around 17 nm−1. Results from simulations and fluctuation electron microscopy suggest that the medium-range order of the amorphous structure is characterized by extended groups of Pt-centered clusters that increase in frequency, structural order, or spatial organization at higher Pt contents. These clusters may be related to the Zr5Pt3 structure, which contains Pt-centered clusters coordinated by 9Zr and 2Pt atoms.

Copyright information

© THE MINERALS, METALS & MATERIALS SOCIETY and ASM INTERNATIONAL 2007