Preparation and characterization of SiC fibers with diverse electrical resistivity through pyrolysis under reactive atmospheres |
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Affiliation: | 1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha PR 410073, China;2. College of Basic Education, National University of Defense Technology, Changsha PR 410073, China;3. College of Materials Science and Engineering, Wuhan Textile University, Wuhan PR 430074, China;1. Laboratoire des Composites Thermostructuraux (LCTS), UMR 5801, CNRS-SAFRAN-CEA-UB, 3 allée de la Boétie, 33600, Pessac, France;2. Safran Ceramics, Rue de Touban – Les Cinq Chemins 33185, Le Haillan, France;3. Laboratoire de Mécanique et Technologie (LMT), UMR 8535, CNRS-ENS-UPMC, 61 Avenue du Président Wilson, 94235, Cachan, France;1. Tokyo University of Science, Yamaguchi, 1-1-1 Daigaku-Dori, Sanyo-Onoda, Yamaguchi 756-0884, Japan;2. UBE Industries, Ltd., 1978-5 Kogushi, Ube, Yamaguchi 755-8633, Japan |
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Abstract: | Due to their fantastic mechanical and high-temperature resistant properties, SiC fibers with electrical resistivity of different orders of magnitude are of great interest for the fabrication of advanced composites with electromagnetic wave absorbent performance as both structural and functional materials. On the basis of well-developed route to prepare SiC fibers, in this work, we demonstrated a facile strategy to fabricate SiC fibers with electrical resistivity of 10−1–106 Ω cm by simply employing hydrogen and ammonia as the reactive atmospheres. The SiC fibers with different electrical resistivity had favorable morphologies, with uniform elemental distribution and stable C/Si ratio towards the fiber interior. Moreover, these fibers exhibited excellent mechanical strength and high temperature performance. Due to the innovative strategy, convenient operation and scalable preparation, the method in this work can be further extended to prepare SiC base fibers with adjustable electrical resistivity from other precursors. |
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Keywords: | SiC fibers Electrical resistivity Precursor Atmosphere CMCs |
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