The Influence of Heat Treatment of the Matrix on the Physical Properties of Carbon-Carbon Composites

Abstract

The effects of heat treatment on carbon-carbon composites have been studied on small composite samples by the use of X-ray diffraction, microstructural analysis (optical and scanning electron microscopy), density measurements, and sonic resonance for determining modulus. Modulus values for small samples of three-dimensional composites give good agreement with rule of mixtures estimates when the actual fiber volume fraction of the small sample is used. Heat treatment of pyrolyzed two-dimensional laminates shows initially a drastic in drop in modulus, corresponding to pyrolysis, decreasing density, and increasing porosity. In the graphitization temperature range, however, some increases are seen in modulus, accompanied by decreasing graphite c-spacing and increasing graphitization. Microstructural examination also shows evidence of increasing graphitization of the matrix, accompanying the increase of stiffness. Keywords: Carbon-carbon Composites, Carbon fiber, Dynamic modulus, Heat treatment.

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Document Details

Document Type
Technical Report
Publication Date
May 02, 1986
Accession Number
ADA183372

Entities

People

  • Leslie A. Feldman
  • Robert A. Meyer
  • Sandra R. Gyetvay

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • Carbon Carbon Composites
  • Carbon Fibers
  • Composite Materials
  • Electron Microscopy
  • Fibers
  • Filaments
  • Graphitic Materials
  • Heat Treatment
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanical Properties
  • Modulus Of Elasticity
  • Physical Properties
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Space