Skin-core structure and bimodal Weibull distribution of the strength of carbon fibers

Author(s)

Dieter Loidl, Oskar Paris, Harald Rennhofer, Martin Müller, Herwig Peterlik

Abstract

The bimodal Weibull parameters of polyacrylonitrile-based carbon fibers were obtained from the fiber-bundle tension test. The bimodality increases with increasing high temperature treatment up to 2100 degrees C and then decreases for the highest temperature treatment of 2400 degrees C. The local structure of the fibers was investigated by scanning X-ray microdiffraction using synchrotron radiation. This enables the mapping of the atomistic structure across the fiber with a position resolution of 100 nm. The mechanical bimodality is attributed to a reversal of the observed skin structure from less orientation to higher orientation as compared to the core.

Organisation(s)

Dynamics of Condensed Systems

External organisation(s)

Universität für Bodenkultur Wien, Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Christian-Albrechts-Universität zu Kiel

Journal

Carbon

Volume

45

Pages

2801-2805

No. of pages

5

ISSN

0008-6223

DOI

https://doi.org/10.1016/j.carbon.2007.09.011

Publication date

2007

Peer reviewed

Yes

Austrian Fields of Science 2012

1030 Physics, Astronomy

Portal url

https://ucris.univie.ac.at/portal/en/publications/skincore-structure-and-bimodal-weibull-distribution-of-the-strength-of-carbon-fibers(148ec498-0b22-4b19-85bc-f3baaa00df8b).html