Title

Mechanism of Formation of the Texture and Microtexture in As-Spun then Oxidized Anisotropic Pitch-Based Carbon Fibers, Part II: Radial Type i2

Document Type

Article

Publication Date

1992

Publication Source

Carbon

Abstract

The microtexture of a radial type of fiber i2 is that of an edge-to-edge type of gel elongated uniaxially by spinning. The structure finally obtained follows a model derived from that of the radial-withwedge type of fiber I1, inside which an increasing disorder is introduced. It is still a combination of two orthogonal orientations of the aromatic layers in the core of the fiber, disrupted near the surface. In the core, a dominant radial texture 2 (containing radial aromatic layers) turns to spiral at the periphery; 2 is constantly prolonged parallel to the fiber axis. The maximum disordering is introduced in the channels 3. They still have a concentric orientation of their aromatic layers and are still dotted along the fiber axis. However, they are strongly distorted in either cross- or longitudinal sections and the dots are not well aligned along the fiber axis. The isotropic phase of the initial pitch is elongated as fibrils. There is no central isotropic pole.

Inclusive pages

569–575

ISBN/ISSN

0008-6223

Publisher

Elsevier

Volume

30

Issue

4

Peer Reviewed

yes