Semi-annual progress rept. 1 Jan-31 May 1972
MICHIGAN UNIV ANN ARBOR DEPT OF MATERIALS AND METALLURGICAL ENGINEERING
Pagination or Media Count:
A large group of glassy carbon samples has been produced by controlled curing and pyrolysis of furfural alcohol based resins. Various structural characterizations and key property measurements have also been made. Crack free samples with apparent densities ranging from .5 to 1.27 gmcu cm, mean pore sizes from 50 Angstroms to 50 microns, B.E.T. surface areas from 20 to 500 sq mgm, elastic modulus from 180,000 to 7,350,000 psi, compressive strength up to 55,000 psi, and tensile strength up to 10,850 psi, have been produced in section thickness up to 1.2 inches. X-ray and electron diffraction, together with electron microscopy have revealed various structural features at size levels from 20 Angstroms to 200 microns.
- Ceramics, Refractories and Glass