Physical Basis of Fragility

Abstract

Fragility of glass-forming liquids in the supercooled region is considered in the context of a defect diffusion theory. It is shown that a necessary condition that a liquid be 'fragile' is that there is an attractive interaction between mobile defects i.e. that the defects cluster with falling temperature. The relationship between the model parameters and a widely used fragility index is described. Each of the model parameters provides a contribution to and insight into the fragility value. The behavior of exceptional cases, such as orientationally disordered crystals and aliphatic monohydric alcohols, is also naturally accounted for in terms of the model.

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Document Details

Document Type
Technical Report
Publication Date
Jun 18, 2003
Accession Number
ADA416359

Entities

People

  • J. T. Bendler
  • John J. Fontanella
  • M. F. Shlesinger

Organizations

  • United States Naval Academy

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Alkali Metals
  • Classification
  • Critical Temperature
  • Diffusion
  • Diffusion Theory
  • Equations
  • Fragility
  • Glass
  • Glass Transition Temperature
  • Materials
  • Military Research
  • Physical Sciences
  • Relaxation Time
  • Transition Temperature
  • United States
  • United States Government
  • United States Naval Academy

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