VIGNOLES, Gerard L.; COINDREAU, Olivia; AHMADI, Azita; BERNARD, Dominique

doi:10.1557/jmr.2007.0216

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VIGNOLES, Gerard L.
Laboratoire des Composites Thermostructuraux [LCTS]

COINDREAU, Olivia
Laboratoire des Composites Thermostructuraux [LCTS]

AHMADI, Azita
Transferts, écoulements, fluides, énergétique [TREFLE]

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Journal of Materials Research. 2007, vol. 22, n° 6, p. 1537-1550

Springer

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Raw and partially infiltrated carbon-carbon composite preforms have been scanned by high-resolution synchrotron radiation x-ray computerized micro-tomography (CMT). Three-dimensional (3D) 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.< Réduire

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Assessment of structural and transport properties in fibrous C/C composite preforms as digitized by X-ray CMT. Part II : Heat and gas transport

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