Static heterogeneity in metallic glasses and its correlation to physical properties

Tetsu Ichitsubo, Hidemi Kato, E. Matsubara, S. Biwa, S. Hosokawa, K. Matsuda, H. Uchiyama, A. Q.R. Baron

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Glasses exhibit intriguing physical and mechanical properties resulting from their structure. We have investigated metal-glass dynamics using inelastic X-ray scattering and ultrasonic techniques for several Pd-, Pt-, and Zr-based glasses with varying fragility. In some cases we have observed a faster phase velocity at short wavelengths than long wavelengths, or positive dispersion. Here we apply elastic wave scattering theory to suggest that the behavior of acoustic phonons can be understood by considering the presence of intrinsic nanoscale elastic inhomogeneity with a certain correlation length, i.e., "static heterogeneity". Furthermore, we suggest that such an elastic inhomogeneity could be the origin of many of the interesting physical and mechanical properties of metallic glasses.

Original languageEnglish
Pages (from-to)494-500
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume357
Issue number2
DOIs
Publication statusPublished - 2011 Jan 15

Keywords

  • Correlation length
  • Elastic wave scattering theory
  • Inelastic X-ray scattering
  • Metallic glasses
  • Nanoscale elastic inhomogeneity
  • Ultrasonic techniques

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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