Micrographic Observations of the Carbonaceous Mesophase by a Quenching Hot Stage.

Abstract

A hot-stage microscope with quenching capability was employed to relate the observations made at the free surface of a pitch during pyrolysis to the bulk microstructure. Freshly formed mesophase spherules display an 'iceberg effect' with only a limited upper segment exposed to view. The mesophase layers tend to lie normal to the free surface, and + or - 2 Pi as well as + or - Pi disclinations display discontinuous cores at the free surface; aside from these minor effects, surface observations appear to be representative of events taking place within the bulk mesophase. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 30, 1982
Accession Number
ADA119793

Entities

People

  • Cassandra B. Ng
  • Jack L. White
  • Manfred Buechler

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Carbon Carbon Composites
  • Chemical Reactions
  • Corporations
  • Fiber Reinforced Composites
  • Fluid Mechanics
  • Laser Spectroscopy
  • Liquid Crystals
  • Material Degradation Processes
  • Materials
  • Materials Science
  • Mechanics
  • Physics
  • Physics Laboratories
  • Quenching
  • Space Sciences
  • Space Systems

Readers

  • Materials Science and Engineering.
  • Reinforced Composite Materials