Microstructure and gas-surface interaction studies of a 3D carbon/carbon composite in atmospheric entry plasma
| Autor: | C. Levet, Gerard L. Vignoles, J. Couzi, Bernd Helber, J.-B. Gouriet, Olivier Chazot, Julien Mathiaud |
|---|---|
| Přispěvatelé: | Laboratoire des Composites Thermostructuraux (LCTS), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Snecma-SAFRAN group-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA-CESTA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), von Karman Institute for Fluid Dynamics (VKI), CEA |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Argon Materials science Composite number Analytical chemistry Reinforced carbon–carbon chemistry.chemical_element 02 engineering and technology General Chemistry Surface finish [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Micrography Microstructure 01 natural sciences chemistry 13. Climate action 0103 physical sciences General Materials Science Inductively coupled plasma Composite material 0210 nano-technology Plasmatron |
| Zdroj: | Carbon Carbon, Elsevier, 2017, 114, pp.84-97. ⟨10.1016/j.carbon.2016.11.054⟩ Carbon, 2017, 114, pp.84-97. ⟨10.1016/j.carbon.2016.11.054⟩ |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2016.11.054⟩ |
| Popis: | 3D Carbon-fiber reinforced carbon composites (3D C f / C ) 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 C f / C 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 C f / C 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. |
| Databáze: | OpenAIRE |
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