Mechanical properties of the SiCf/SiC composites reinforced with KD-I and KD-II fibers fabricated assisted by a microwave heating method |
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| Affiliation: | 1. Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN 37831, USA;2. National Institutes for Quantum and Radiological Science and Technology, 2-166 Omotedate, Obuchi, Rokkasho, Aomori 039-3212, Japan;3. Stony Brook University, 100 Nicolls Rd, Stony Brook, NY 11794, USA;1. CEA, DEN, SRMA, LTMEx, 91191 Gif-sur-Yvette, France;2. CEA, DEN, SRMP, 91191 Gif-sur-Yvette, France;3. Ecole Normale Super, CNRS, UMR 8538, Lab Geol, 75231 Paris 5, France;4. Institut de Sciences des Matériaux de Mulhouse – CNRS – LRC 7228, 15 rue Jean Starcky, 68057 Mulhouse, France;1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, China;2. Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China;1. Wenchang Command & Control Station of Xichang Satellite Launch Center, Wenchang, 571300, China;2. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China |
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| Abstract: | SiCf/SiC composites using KD-I and KD-II SiC fibers braided preforms as the reinforcements were fabricated by applying the polymer impregnation and pyrolysis (PIP) technique with a microwave heating assistance. The microwave heating temperature was 1100 °C, 1200 °C, 1300 °C, and 1400 °C, respectively. Microstructures, flexure properties, and fracture behaviors of the composites were investigated. The KD IISiCf/SiC composites exhibited higher flexure properties and improved non-brittle fracture characteristics than those of the KD-ISiCf/SiC composites. The differences in the flexural properties, fracture behaviors and microstructures between the KD-I and KDIISiCf/SiC composites were discussed based on the tensile properties of the SiC filaments and the interfacial bonding statues in the composites. |
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| Keywords: | A. Microwave processing B. Composites C. Mechanical properties D. SiC |
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