LEVET, C.; HELBER, B.; COUZI, J.; MATHIAUD, J.; GOURIET, J.-B.; CHAZOT, O.; VIGNOLES, Gerard

doi:10.1016/j.carbon.2016.11.054

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LEVET, C.
Laboratoire des Composites Thermostructuraux [LCTS]

HELBER, B.
von Karman Institute for Fluid Dynamics [VKI]
Vrije Universiteit Brussel [Bruxelles] [VUB]

COUZI, J.

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Carbon. 2017-04-01, vol. 114, p. 84-97

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3D Carbon-fiber reinforced carbon composites (3D ) are widely used as thermostructural protections in various applications. Among them, thermal protection systems for atmospheric re-entry encounter one of the most aggressive environments, where 3D are exposed to strong ablation. Because flight tests are extremely expensive, Inductively Coupled Plasma torch is a good compromise to understand the behaviour of this material under ablative conditions. The Plasmatron of the von Karman Institute for Fluid Dynamics is used in this study, coupled with a numerical rebuilding of the flow. Air and argon flows are used on flat and hemispherical 3D samples leading to surface temperatures ranging from 1800° C to 2500° C. In-situ measurements are performed coupled with SEM micrography and 3D pictures from digital optical microscopy in order to understand the epi-macro-structural and the epi-micro-structural roughness of the composite. The internal structure of the composite was revealed by the differences in ablation resistance between constituents. It is found that the flow field has a major contribution to the composite macroscopic and mesoscopic roughness and recession velocity.< Réduire

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Microstructure and gas-surface interaction studies of a 3D carbon/carbon composite in atmospheric entry plasma

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