Preparation of in situ grown silicon carbide nanofibers radially onto carbon fibers and their effects on the microstructure and flexural properties of carbon/carbon composites |
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| Affiliation: | 1. Key Lab. for Eco-textiles, Ministry of Education, Jiangnan University, Wuxi, Wuxi214122, PR China;2. State Key Lab. for Powder Metallurgy, Central South University, Changsha 410083, PR China;1. Institute for Fiber Engineering, Shinshu University (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan;2. Division of Molecular Science, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan;3. Department of Textile Science and Technology, Graduate School of Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan;1. International Laboratory for Insulation and Energy Efficiency Materials, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China;2. Composite Materials Research Laboratory, Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260-4400, USA;3. Suzhou Superlong Aviation Heat Resistance Material Technology Co.,Ltd, Suzhou, 215400, PR China;4. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, PR China;5. Center of Materials Physics and Chemistry, School of Physics and Nuclear Energy Engineering, Beijing University of Aeronautics and Astronautics, Beijing, 100191, PR China;6. Jiangsu Collaborative Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210016, PR China;7. Yixing Huaheng High Performance Textile Co., Ltd, Yixing, 214216, PR China;1. Science and Technology on Thermostructure Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China;2. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Shaanxi 710119, China;1. State Key Laboratory of Solidification Processing, Shaanxi Province Key Laboratory of Fiber Reinforced Light Composite Materials, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi''an, China;2. Department of Mechanical Engineering, California State University, Los Angeles, USA;3. School of Material Science and Engineering, Xi''an University of Technology, Xi''an, China |
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| Abstract: | Silicon carbide nanofibers (SiCNFs) used as the second reinforcements of carbon/carbon composites were grown radially on the carbon fiber surface. The microstructure of SiCNFs and their effects on the microstructure and flexural properties of C/C composites were investigated. Results show that there are many defects such as twin crystals and stacking faults in SiCNFs which were grown by catalytic chemical vapor deposition. During the same process, the skin region of carbon fiber has changed. Several SiC layers are formed and the arrangement of the graphite layers around SiC layers is more orderly. In the next chemical vapor infiltration, due to the induction of SiCNFs, the middle textural pyrocarbon were formed firstly and then is the high textural pyrocarbon. The existence of SiCNFs also contributes to the three-phase interface between pyrocarbon, SiCNFs and carbon fibers, resulting in a good bond between carbon fiber and matrix. Those structural changes lead the better flexural properties of SiCNF–C/C composites compared with C/C composites. |
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