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Microtexture and mechanical properties of carbon fibers: Relationship with the fiber-matrix adhesion in a carbon-epoxy composite

✍ Scribed by M. Guigon

Publisher
Society for Plastic Engineers
Year
1991
Tongue
English
Weight
878 KB
Volume
31
Category
Article
ISSN
0032-3888

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✦ Synopsis

Abstract

The structure and the microtexture of carbon fibers are determined by transmission electron microscopy. All PAN‐based carbon fibers are made up of elemental microtextural units (EMU) whose microtexture governs their mechanical properties. EMU Carbon layers exhibit either their edge or their surface for outcropping the external surface of the fiber. Interfacial phenomena between fibers and matrix in a composite material depend on this outer microtexture.

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Unidirectional (UD) composites, fabricated with surface-oxidized HT carbon fibers (Magnamite AS4, Hercules) and with two mesogenic pitches and two mesophase pitches, were stabilized at 1 MPa oxygen pressure and 200Β°C to various amounts of oxygen uptake, carbonized and graphitization-treated at 2100Β°