DEFECTS IN ALUMINUM QUENCHED FROM THE LIQUID STATE

Abstract

High purity aluminum was quenched from the liquid state and specimens were examined by transmission electron microscopy. Very high densities of defects in the form of perfect loops, imperfect loops, and small black spots were observed. The vacancy concentration, as deduced from the number and size of defects, increase with increasing temperature at a much slower rate in the liquid than in the solid. Both the vacancy formation energy and the entropy factor appear to be considerably reduced above the melting point. Also, a discontinuity in the vacancy concentration is observed at the melting point.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1963
Accession Number
AD0409729

Entities

People

  • Gray C. Thomas
  • R. H. Willens

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum
  • Electron Microscopy
  • Electrons
  • Engineering
  • Fungi
  • High Density
  • Materials
  • Materials Laboratories
  • Materials Science
  • Melting
  • Melting Point
  • Metals
  • Microscopy
  • New Jersey
  • New York
  • Solid State Physics
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene