UHTC-based matrix as protection for Cf/C composites: Original manufacturing,microstructural characterisation and oxidation behaviour at temperature above 2000 °C |
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| Affiliation: | 1. Université de Bordeaux, CNRS, Safran Ceramics, CEA, Laboratoire des Composites ThermoStructuraux (LCTS), UMR-5801, 3 allée de la Boëtie, FR-33600 Pessac, France;2. Université de Bourgogne Franche Comté, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbéliard (UTBM), rue de Leupe, FR-90400 Sévenans, France;3. Safran Ceramics, rue de Touban, les 5 chemins, FR-33185 Le Haillan, France;1. Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan;2. Graduate School of Advanced Technology, National Taiwan University, Taipei 10617, Taiwan;1. Frantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, 3, Krzhyzhanovsky Str., 03680 Kyiv, Ukraine;2. Bakul Institute for Superhard Materials, National Academy of Sciences of Ukraine, 2, Avtozavods′ka Str., 04074 Kyiv, Ukraine;1. Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China;2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China;3. School of Mechanics, Civil Engineering & Architecture, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China |
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| Abstract: | In space propulsion applications, the development of new ceramic matrix composites with improved resistance to oxidation and ablation at high temperature is needed and ultra-high temperature ceramics-based ones appear the most suitable. Combination of both powder impregnation (ZrB2, C) and liquid silicon infiltration enabled manufacturing of UHTC based matrices in Cf/C preforms with less than 10 vol% open porosity and various proportions and homogeneous distribution of C, ZrB2, SiC and Si. Oxidation behaviour was evaluated on composite structures using an oxyacetylene torch at temperatures higher than 2000 °C. Chemical analyses and microstructural observations before and after oxidation testing evidenced the protection ability of ZrB2-SiC-Si matrices thanks to the formation of multi-oxide scales which resisted even tested durations of 6 min and pointed the unharmful presence of residual 12 vol% silicon on the composite for use at high temperature under high gas flows. |
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| Keywords: | Ceramic matrix composites (CMC) UHTC Reactive melt infiltration (RMI) Oxyacetylene torch testing Oxidation |
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