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Structure of Post-Creep Carbon Fibres

Journal Key Engineering Materials (Volume 290)
Volume Fractography of Advanced Ceramics II
Edited by J. Dusza, R. Danzer and R. Morrell
Pages 268-271
DOI 10.4028/www.scientific.net/KEM.290.268
Citation H. Rennhofer et al., 2005, Key Engineering Materials, 290, 268
Online since July, 2005
Authors H. Rennhofer, Dieter Loidl, Johann Brandstetter, Karl Kromp, Roland Weiss, Herwig Peterlik
Keywords Carbon Fiber (CF), Creep, Dorn Equation, X-Ray Diffraction (XRD)
Abstract

Creep tests have been performed for carbon fibre bundles (Toray, HTA5131) in a temperature range from 1500 °C to 1800 °C and at various stress levels in a tensile testing machine in vacuum (pressure was kept below 10-3 mbar). Creep parameters have been obtained from the diagrams elongation versus time. X-rays (SAXS and WAXD) have been used for accompanying structural investigations. An increase in the alignment of the graphene sheets with respect to the fibre (and thus the loading) axis was observed with increasing test temperature. For fibres stabilised by heat treatment (2 hours, 2100 °C, without load) no creep and no structural change could be observed.

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