Local atomic structure of Pd-Ni-P bulk metallic glass examined by high-resolution electron microscopy and electron diffraction

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Akihiko Hirata
  • Yoshihiko Hirotsu
  • Tadakatsu Ohkubo
  • Nobuo Tanaka
  • T.G. Nieh

Detail(s)

Original languageEnglish
Pages (from-to)903-907
Journal / PublicationIntermetallics
Volume14
Issue number8-9
Online published15 Mar 2006
Publication statusPublished - Aug 2006
Externally publishedYes

Conference

TitleFourth International Conference on Bulk Metallic Glasses (BMG-IV)
Location
PlaceUnited States
CityGatlinburg
Period1 - 5 May 2005

Abstract

Structural fluctuation in a Pd40Ni40P20 bulk metallic glass is investigated by transmission electron microscopy and electron diffraction. Local atomic ordered regions with a fcc-(Pd,Ni) type structure was sharply imaged by a high-resolution electron microscopy (HREM) attached with a Cs-corrector. Interference function for the glassy state was obtained from electron-diffraction intensity profiles using energy-filter and imaging-plate techniques. We used a reverse Monte Carlo (RMC) simulation method to develop a realistic structure model. The model consists of a dense-random-packing structure, in which an fcc ordered region with Pd, Ni, and P atoms was embedded. The structure model is consistent with the diffraction and HREM results. In Voronoi polyhedral analysis of the RMC simulated structure, P-centered (Pd,Ni)-P trigonal prisms are found primarily in the matrix structure embedding the fcc-cluster. Around Pd and Ni atoms deformed-fcc type polyhedra were frequently observed. From these local structural features, nanoscale phase separation was revealed to occur during the glass formation.

Research Area(s)

  • Glasses, metallic, Diffraction, Electron microscopy, transmission

Citation Format(s)

Local atomic structure of Pd-Ni-P bulk metallic glass examined by high-resolution electron microscopy and electron diffraction. / Hirata, Akihiko; Hirotsu, Yoshihiko; Ohkubo, Tadakatsu; Tanaka, Nobuo; Nieh, T.G.

In: Intermetallics, Vol. 14, No. 8-9, 08.2006, p. 903-907.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review