UNIFORM WORK FUNCTION CATHODE STUDIES FOR THERMI ONIC CONVERTERS.

Abstract

X-ray analysis of vapor deposited molybdenum shows that either (111) or (100) preferred orientations can be obtained. Further work indicates that precise control of impurities is needed before reproducible results can be obtained. Cathodes having (111) orientations were produced using vapor deposition techniques. Methods of polish ing cathode surfaces were studied. X-ray studies show that heat treatment is adequate to restore the preferred orientation at a mechanically pol ished surface. The reproducibility of performance of test diodes was established by comparison of currea with data from previous work. Con struction of an emission electron microscope for cathode work function distribution studies is in progress. Preliminary work has been done with an electron mirror microscope.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1963
Accession Number
AD0402697

Entities

People

  • M.n. Huberman
  • R.a. Mohr

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Assembly
  • California
  • Chemical Vapor Deposition
  • Construction
  • Crystals
  • Electron Microscopes
  • Electropolishing
  • Heat Treatment
  • Materials
  • Materials Engineering
  • Single Crystals
  • Standards
  • Surface Roughness
  • Thermionic Converters
  • United States
  • Vapor Deposition

Readers

  • Metallurgy
  • Pulsed Power and Plasma Physics.
  • Snow Cover Descriptors for Reptiles and Their Illustrations.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene