Glassy Carbons

Abstract

Through the introduction of a controlled porosity, it was possible to produce glassy carbon in section thickness in excess of 3 inches in processing times less than six days. The properties obtainable compare favorably not only with other carbons, but with other materials for high temperature applications. A new thermodynamic method was developed and applied to quantitatively measure the configurational enthalpy and entropy of various glassy carbons relative to graphite. Disorder in glassy carbon was shown to at least partially account for the increased resistance to gasification in CO-CO2 shown at high temperatures by glassy carbons with respect to graphite. The fine structure determined by electron microscopy, electron diffraction and X-ray diffraction is not homogeneous on a size scale below 100 Angstroms.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1975
Accession Number
ADA012815

Entities

People

  • Edward E. Hucke

Organizations

  • Defense Advanced Research Projects Agency

Tags

Communities of Interest

  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Body Weight
  • Crystal Structure
  • Dead Reckoning
  • Diffraction
  • Electron Diffraction
  • Electron Microscopes
  • Electron Microscopy
  • Flow Rate
  • Graphitic Materials
  • High Temperature
  • Materials
  • Measurement
  • Microscopy
  • Plastic Explosives
  • Scattering
  • X Rays
  • X-Ray Diffraction

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics