Accession Number:

AD0763499

Title:

Glassy Carbons

Descriptive Note:

Semi-annual progress rept., 1 Jan-30 Jun 1973

Corporate Author:

MICHIGAN UNIV ANN ARBOR DEPT OF MATERIALS AND METALLURGICAL ENGINEERING

Personal Author(s):

Report Date:

1973-06-01

Pagination or Media Count:

104.0

Abstract:

Measurements of the physical and mechanical properties of a large number of glassy carbon samples produced from controlled pyrolysis of furfural alcohol resins demonstrated that the structure can be tailored very substantially. The ability to control properties such as density and fine structure leads to interesting and potentially useful mechanical, physical, and chemical properties. Section thickness in excess of 2 inches have been achieved in very fine pored 100A glassy carbons in processing times of less than six days. The carbons fine structure determined by electron microscopy, electron diffraction and x-ray diffraction is not homogeneous on a size scale below 100 Angstroms. Thermodynamic measurements of the configurational enthalpy and entropy of various glassy carbons relative to graphite confirms that their structures are significantly different.

Subject Categories:

  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE