Accession Number:

ADA125807

Title:

Nonequilibrium Disclinations in the Carbonaceous Mesophase.

Descriptive Note:

Technical rept.,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA MATERIALS SCIENCES LAB

Personal Author(s):

Report Date:

1983-01-21

Pagination or Media Count:

14.0

Abstract:

The behavior of carbonaceous mesophase in the liquid crystalline state has been observed directly by polarized light on the free surface of a petroleum pitch during pyrolysis. The present work focuses attention on the reactions between various disclinations, and primarily on the spontaneous generation of new disclinations from compressed folds in the mesophase layers. Specimens quenched from critical stages in such reactions reveal that structures of freshly formed disclinations can be distorted appreciably from the equilibrium structures of relaxed disclinations. Author

Subject Categories:

  • Physical Chemistry
  • Geology, Geochemistry and Mineralogy
  • Refractory Fibers
  • Textiles
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE