THE EFFECT OF HEAT TREATMENT ON THE THERMAL EXPANSION OF PYROLYTIC GRAPHITE

Abstract

Thermal expansion was studied by x-ray techniques for three graphites: a commercially available pyrolytic graphite, PG: the same PG annealed at 3410 C for 1 hr; and AGKSP, a spectrographic grade graphite. The coefficients of thermal expansion along the C-axis alpha (c) for the three materials are respectively: 26.5 x 10 to the -6 power (20-2400 C); 27.9 x 10 to the -6 power (20-3000 C); and 30.1 x 10 to the -6 power (20-2700 C). The value of alpha (c) is found to increase with a decrease in the fraction of disordered layers (p) in the graphite. Discussion of this effect is extended to include the results of other studies.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1966
Accession Number
AD0801623

Entities

People

  • Ewart S. Elliott
  • James H. Richardson

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Advanced Materials
  • Air Force
  • California
  • Coefficients
  • Commerce
  • Corporations
  • Crystal Lattices
  • Engineered Materials
  • Government (Foreign)
  • Graphitic Materials
  • Heat Treatment
  • Materials
  • Materials Science
  • Measurement
  • Space Systems
  • Thermal Expansion
  • X Rays

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Thermal Physics or Thermal Science.