Accession Number : AD0787741

Title :   Glassy Carbon Alloys.

Descriptive Note : Final rept.,


Personal Author(s) : Walker,P. L. , Jr

Report Date : 15 OCT 1974

Pagination or Media Count : 71

Abstract : Glassy carbons show promise of having a wide use in defense and space applications. The considerable porosity in glassy carbons results in their having a reasonably low coefficient of thermal expansion and, hence, reasonably good thermal shock resistance. This research program has had as one of its main objectives to determine the possibilities of ultimately modifying the structure and properties of glassy carbon by the addition of various elements to the starting organic precursors. Another main objective of this research program has been to study the effects of the application of pressure during polymerization and/or carbonization of glassy carbon precursors on the structure and properties of carbon produced. Progress and major results achieved in each area concerning the following: Glassy Carbons as Modified by Addition of Metals; Glassy Carbons Produced by Processing Precursors Under High Pressure; Cellulose Carbon-Carbon fiber(Chemical Vapor Deposition) Composites; and Binary Glassy Carbons by Vapor Deposition Methods.

Descriptors :   *Carbon, *Composite materials, Amorphous materials, Additives, Polymers, Cellulose, Fibers, Fiber reinforced composites, Mechanical properties, High pressure, Hot pressing, Electron microscopy, Carbides, Sputtering, Films, Microstructure

Subject Categories : Ceramics, Refractories and Glass
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE