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Assessment of geometrical and transport properties of a fibrous C/C composite preform as digitized by x-ray computerized microtomography: Part II. Heat and gas transport properties

Published online by Cambridge University Press:  31 January 2011

Gerard L. Vignoles*
Affiliation:
Université Bordeaux 1, Laboratoire des Composites ThermoStructuraux (LCTS) 3, Allée La Boëtie, F33600 Pessac, France
Olivia Coindreau
Affiliation:
Université Bordeaux 1, Laboratoire des Composites ThermoStructuraux (LCTS) 3, Allée La Boëtie, F33600 Pessac, France
Azita Ahmadi
Affiliation:
Université Bordeaux 1, Transport, Ecoulements Fluides, Energétique (TREFLE), Esplanade des Arts et Métiers, F33405 Talence, France
Dominique Bernard
Affiliation:
Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), 26 Avenue du Dr. Schweitzer, F33608 Pessac Cedex, France
*
a)Address all correspondence to this author. e-mail: vinhola@lcts.u-bordeaux1.fr
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Abstract

Raw and partially infiltrated carbon–carbon composite preforms have been scanned by high-resolution synchrotron radiation x-ray computerized microtomography. Three-dimensional high-quality images of the pore space have been produced at two distinct resolutions and have been used for the computation of transport properties: heat conductivity, binary gas diffusivities, Knudsen diffusivities, and viscous flow permeabilities. The computation procedures are based on a double change-of-scale strategy suited to the bimodal nature of pore space and on the local determination of transport anisotropy. Good agreement has been found between all calculated quantities and experimental data.

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Articles
Copyright
Copyright © Materials Research Society2007

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References

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