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

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Abstract:

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:

Advances in Science and Technology (Volume 45)

Pages:

1489-1494

DOI:

https://doi.org/10.4028/www.scientific.net/AST.45.1489

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Online since:

October 2006

Authors:

Jürgen Meinhardt, Tobias Woyke, Friedrich Raether, Andreas Kienzle

Keywords:

Carbon, Composite, Corrosion, Oxidation, Wear Parts

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

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