Accession Number : ADA191729

Title :   Electronic and Structural Studies of Carbon/Carbon Composites,

Descriptive Note : Rept. for 1 Sep 86-31 Aug 87,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF PHYSICS

Personal Author(s) : Doll, G L ; Sakya, R M ; Nicholls, J T ; Speck, J S ; Dresselhaus, M S

PDF Url : ADA191729

Report Date : 30 Oct 1987

Pagination or Media Count : 7

Abstract : Room temperature Raman microprobe x-ray diffraction and electrical resistivity measurements have been performed on carbon/carbon composites made from mesophase pitch which were heat treated at temperatures above 2680 Celsius. Results of these measurements indicate that both the ex-pitch carbon fiber and mesophase pitch matrix constituents of the composites were highly graphitic, exhibiting in-plane crystallite dimensions greater than 1000 Angstroms. The c-axis crystallite dimensions were determined by analysis of x ray diffraction peak widths to be approximately 150 Angstroms. Copper chloride was successfully reacted with these carbon-carbon composites forming a stage three graphite intercalation compound in both the fibers and the matrix, as determined by their Raman spectra. Keywords: Carbon carbon composites, Raman characterization carbon carbon composites, Electronic and Structural characterization of carbon carbon composites.

Descriptors :   *CARBON CARBON COMPOSITES, *STRUCTURAL PROPERTIES, CHLORIDES, COPPER, ELECTRICAL MEASUREMENT, ELECTRICAL RESISTANCE, HEAT TREATMENT, MATRIX MATERIALS, PITCH(MATERIAL), RAMAN SPECTRA, CARBON FIBERS, GRAPHITED MATERIALS, REPRINTS

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE