The oxidation behaviour of carbon fibres |
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| Authors: | Y. Yin J. G. P. Binner T. E. Cross S. J. Marshall |
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| Affiliation: | (1) Departments of Materials Engineering and Materials Design, University of Nottingham, NG9 2RD University Park, Nottingham, UK;(2) Departments of Electrical and Electronic Engineering, University of Nottingham, NG9 2RD University Park, Nottingham, UK;(3) Department of Physiology and Environmental Science, University of Nottingham, LE12 5RD Sutton Bonington, Loughborough, UK |
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| Abstract: | The oxidation behaviour of carbon fibres has been studied in air at different temperatures from 550 to 860 °C. A linear relationship has been observed between the carbon fibre size and oxidation time. Experimental results show that the oxidation process is in a mixed control zone, i.e. controlled both by diffusion of the gaseous reactant and product within the boundary layer and by the chemical reaction. The activation energy of carbon burn-off is 140±5 kJ mol–1. The uniform nature of the surface oxidation makes it possible to re-size the carbon fibres to smaller diameters. |
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