Accession Number:

ADA013524

Title:

Investigation of Structure of Graphite Fibers with the Goal of Improving Their Mechanical Properties.

Descriptive Note:

Progress rept. Jun-Dec 74,

Corporate Author:

ARMY MOBILITY EQUIPMENT RESEARCH AND DEVELOPMENT CENTER FORT BELVOIR VA

Personal Author(s):

• Goldfein,Solomon

Report Date:

1974-12-01

Pagination or Media Count:

39.0

Abstract:

The objective of the study was to develop data upon which a program could be based to improve the strength of graphite fibers. It was found that graphite fibers are composed of ribbons or sheets and contain many voids and flaws. The ribbons twist and undulate offering many opportunities for them to bend, fold over and cut each other. This condition explains their relatively poor tensile, compressive, shear and impact strengths. Similar conditions exist in dry areas in glass fiber reinforced composites and laminates. They are corrected by injection of resin into the area followed by hardening of the resin. Such an approach if used successfully with graphite fibers should strengthen them immearsurably. Exfoliated graphite has not been investigated as a source for high strength and modulus materials.

Descriptors:

• *CARBON FIBERS
• MECHANICAL PROPERTIES
• MICROSTRUCTURE
• GRAPHITE
• DEFECTS(MATERIALS)
• SPUTTERING

Subject Categories:

• Textiles

Distribution Statement:

APPROVED FOR PUBLIC RELEASE