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)

University of Natural Resources and Life Sciences, 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://ucrisportal.univie.ac.at/en/publications/skincore-structure-and-bimodal-weibull-distribution-of-the-strength-of-carbon-fibers(148ec498-0b22-4b19-85bc-f3baaa00df8b).html