Accession Number : AD0787680

Title :   Microstructural Observations on a Commercial Glassy Carbon,

Corporate Author : GENERAL ATOMIC CO SAN DIEGO CALIF

Personal Author(s) : Kaae,J. L.

Report Date : AUG 1974

Pagination or Media Count : 10

Abstract : Ion sputtering has been used to thin a commercial glassy carbon for transmission electron microscopy. This thinning technique produces much larger thin regions than fragmentation which has previously been employed to produce specimens of glassy carbon for transmission electron microscopy and allows examination of the microstructure on a much broader scale. The glassy carbons which were examined were heat treated to 1800C. Specimens from several different lots were first thinned by mechanical polishing to a thickness of about 0.001 in. and then were further thinned by bombardment with 6 KeV argon ions until perforation. Examination of the thin regions was carried out in a Phillips EM300 transmission electron microscope at an accelerating voltage of 100 KV. Only at high magnifications could structure be resolved in the major portions of the foils. Ribbons spheroids and inclusions are described.

Descriptors :   *Carbon, Amorphous materials, Microstructure, Spheres, Electron microscopy, Surface finishing

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE