Atomic Transport in Metallic Glasses.

Abstract

The viscosity of glassy Pd77.5Cu6Si16.5 near Tg has bimolecular relaxation kinetics. A new determination of the equilibrium is reported, which is an order of magnitude higher than literature values. The iso-configurational temperature dependence is found to depend on thermal history. Diffusion measurements in compositionally modulated films have been made. Reported here are: iso-configurational diffusivities, relaxation kinetics, and modulation wavelength dependence. The existence of a gradient energy coefficient in metallic glasses has been established. The diffusivity is about two orders of magnitude higher than the predictions of the Stokes-Einstein relation from the viscosity.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1983
Accession Number
ADA136363

Entities

People

  • A. L. Greer
  • F. Spaepen
  • R. C. Cammarata
  • S. S. Tsao

Organizations

  • Harvard University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Amorphous Materials
  • Coefficients
  • Creep
  • Diffusion
  • Diffusivity
  • Glass Transition Temperature
  • Isotherms
  • Kinetics
  • Measurement
  • Mechanical Properties
  • Metals
  • Modulus Of Elasticity
  • Thin Films
  • Transition Temperature
  • Transitions
  • Viscosity
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Materials Science and Engineering.
  • Nanocomposite Materials Science