Glassy Carbons

Abstract

Porous glassy carbons achieved by pyrolysis of flurfural alcohol resins can reproducibly and rapidly be produced in large sections with tailored properties of potential interest for mechanical, physical and chemical applications. Sections greater than three inches have been made in pyrolysis cycles of one day. Thermodynamic cell measurements of the configurational enthalpy and entropy difference between glassy carbons and graphite have shown that the fine structures of various glassy carbons are quite different and certainly not merely microcrystalline graphite. Small angle X-ray scattering measurements under improved experimental conditions have shown excellent agreement with other such work on commercial glassy carbon samples. A rather strong inverse relation exists between the compressive strength and electrical resistivity, reduced by calculation to eliminate all pores open to xylene, indicating that better layer perfection leads to higher strength.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1974
Accession Number
AD0776544

Entities

People

  • Edward E. Hucke

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Barometric Pressure
  • Carbon Carbon Composites
  • Compressive Strength
  • Crystal Structure
  • Diffraction
  • Equations
  • Free Energy
  • Geometry
  • Materials
  • Measurement
  • Mechanical Properties
  • Partial Pressure
  • Scattering
  • Weighting Functions
  • X Ray Scattering
  • X Rays
  • X-Ray Diffraction

Readers

  • Polymer Science and Technology
  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials