Measurement and Simulation of the Oxidation of Carbon Fibers and C/SiC Ceramic

Abstract:

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The fracture toughness increases but the long-term oxidation resistance of carbon short fiber reinforced C/SiC composites decreases if the volume fraction of carbon fibers is high. To understand the oxidation kinetic and their dependence from the C/SiC microstructure the composites and also the used carbon short fiber bundles were investigated by a thermo balance and by scanning electron microscopy. Additionally the oxidation of single carbon short fibers was measured in situ by a hot stage light microscope. To simulate oxidation kinetics a software program using Finite Element methods was developed. Below 800 °C oxidation resistance can be improved by increasing the degree of graphitization of the carbon material within the short fiber bundles. Above 800 °C the number of junctions between the short fiber bundles has to be reduced.

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Periodical:

Edited by:

P. VINCENZINI

Pages:

1489-1494

DOI:

10.4028/www.scientific.net/AST.45.1489

Citation:

J. Meinhardt et al., "Measurement and Simulation of the Oxidation of Carbon Fibers and C/SiC Ceramic", Advances in Science and Technology, Vol. 45, pp. 1489-1494, 2006

Online since:

October 2006

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$35.00

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