In-situ processing of carbon coatings on the surface of SiC-based fibers
| Autor: | Patrick Weisbecker, Benoît Rufino, Sylvie Loison, Hervé Plaisantin, Eric Philippe, Stéphane Mazerat, A. Delcamp, Alain Guette, René Pailler, Laurence Maillé |
|---|---|
| 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), Snecma Propulsion Solide (SPS), SAFRAN Group |
| Rok vydání: | 2010 |
| Předmět: |
Thermogravimetric analysis
Materials science chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Adsorption Coating X-ray photoelectron spectroscopy Specific surface area Materials Chemistry [CHIM]Chemical Sciences Fiber Composite material Fibres [CHIM.MATE]Chemical Sciences/Material chemistry Surfaces and Interfaces General Chemistry Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics Carbon 0104 chemical sciences Surfaces Coatings and Films chemistry engineering 0210 nano-technology Porosity |
| Zdroj: | Surface and Coatings Technology Surface and Coatings Technology, Elsevier, 2010, 205 (3), pp.703-709. ⟨10.1016/j.surfcoat.2010.07.060⟩ Surface and Coatings Technology, 2010, 205 (3), pp.703-709. ⟨10.1016/j.surfcoat.2010.07.060⟩ |
| ISSN: | 0257-8972 1879-3347 |
| Popis: | International audience; Carbon coatings have been formed on the surface of free carbon containing Tyranno ZMI and Nicalon SiC-based fibers by reaction with chlorine gas (chlorination) in the temperature range 550-675 °C. The kinetics and growth mechanisms have been investigated for both fibers. Results have shown that, for similar experimental conditions, the reactivity of both fibers displayed noticeable discrepancies. It has thus been observed that the Nicalon fiber was more prone to chlorine-based treatment and displayed a thicker carbon coating than the ZMI fiber. These results have also revealed that, in both case, these thicknesses can be closely monitored by physical parameters such as temperature and aging duration. The nature of the obtained coating has also been investigated by various experimental devices. AES, SEM and TEM analyses have thus evidenced that these carbon coatings were uniform and well adherent whereas AFM showed that the chlorine-based treatments resulted in a nanometer-range roughness at the fiber surface. Adsorption gas analyses also revealed a microporosity coupled with a high specific surface area. The chemical composition of the final products was determined by XPS and Mass Spectroscopy. Finally, the oxidation behaviour which was investigated by thermogravimetric analysis revealed that oxidation occurs at a quite low temperature (225°C). |
| Databáze: | OpenAIRE |
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