Mechanisms of Exo-Electron Emission in Structural Materials.

Abstract

This work is aimed at understanding the origin of fatigue enhanced photostimulated exo-electron emission. The experimental part thereof is reported in the bulk of this report and the theoretical analysis in the Appendix of the report. Measurements of the photoyield of flexurally fatigued aluminum are reported as a function of photon energy for several different initial microstructures of the material; samples were prepared under well-annealed and work hardened conditions, and some were doped with small copper additions. It was found that for photon energies less than about 9 eV fatigue enhances the photoemission. It was also observed that this 'photo-stimulated exo-electron emission' is quite sensitive to the initial microstructure. The enhancement occurs much more rapidly with fatigue for well-annealed Al than for work hardened specimens.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1977
Accession Number
ADA041488

Entities

People

  • F. J. Szalkowski
  • J. M. Curnow
  • O. Buck
  • W. J. Pardee

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aluminum Oxides
  • Angle Of Incidence
  • Cells
  • Crystal Structure
  • Electric Fields
  • Electron Emission
  • Electron Microscopes
  • Electrons
  • Materials
  • Materials Science
  • Measurement
  • Optical Properties
  • Shot Peening
  • Surface Chemistry
  • Surface Properties
  • Surface Roughness

Fields of Study

  • Physics

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.

Technology Areas

  • Microelectronics