Interaction of fiber matrix bonding in SiC/SiC ceramic matrix composites |
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| Affiliation: | 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. Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, USA;2. Department of Mechanical Engineering, The University of Akron, Akron, OH, USA;3. Ceramic and Polymer Composites Branch, NASA Glenn Research Center, Cleveland, OH, USA;1. Science and Technology on Scramjet Laboratory, China Aerodynamics Research and Development Center, Mianyang 621000, China;2. Flight Theory Department, Army Aviation College, Beijing 101116, China;3. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, China;1. DEN-Service de Recherches Métallurgiques Appliquées (SRMA), CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France;2. Laboratoire de Mécanique et Technologie (LMT), UMR 8535, CNRS-ENS-UPMC, Cachan, France;3. DEN-Service d’Etudes Analytiques et de Réactivité des Surfaces (SEARS), CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France |
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| Abstract: | Non-oxide ceramic matrix composites (CMC) based on SiC fibers with SiC matrix were fabricated by polymer infiltration and pyrolysis (PIP) and characterized regarding their microstructural features and their mechanical properties. The fiber preform was made using winding technology. During the winding process, the SiC fiber roving was impregnated by a slurry containing SiC powder and sintering additives (Y2O3, Al2O3 and SiO2). This already helped to achieve a partial matrix formation during the preform fabrication. In this way, the number of PIP cycles to achieve composites with less than 10% open porosity could be reduced significantly. Additionally, damage-tolerant properties of the composites were obtained by an optimal design of the matrix properties although only uncoated fibers were used. Finally, composites with a strength level of about 500 MPa and a damage-tolerant fracture behavior with about 0.4% strain to failure were obtained. |
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| Keywords: | SiC/SiC CMC PIP Sintering Ceramic filler Fiber matrix bonding |
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