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.

Report Date:

1987-10-30

Pagination or Media Count:

7.0

Abstract:

Room temperature Raman microprobe x-ray diffraction and electrical resistivity measurements have been performed on carboncarbon 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