Effect of various methods of pre-treatment of carbon fibers on the mechanical properties of PIP-based ceramics/carbon composites |
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| Affiliation: | 1. Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Mickiewicza 30 Av., 30-059 Cracow, Poland;2. Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30 Av., 30-059 Cracow, Poland;1. Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China;2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;1. Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 16628 Prague 6, Czech Republic;2. Institute of Ceramics, Refractories and Composite Materials, TU Bergakademie Freiberg, Agricolastr. 17, 09599 Freiberg, Germany;1. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;2. Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore;3. Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China;4. National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 102206, China;1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;2. School of Material Science and Energy Engineering, Foshan University, Foshan 528000, China;3. Nuclear Fuel Research and Development Center, China Nuclear Power Technology Research Institute, Shenzhen 518026, China;1. Key Laboratory of Science and Technology on High-tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China |
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| Abstract: | The purpose of the work was to determine the conditions of CF preparation to obtain carbide composites with favorable mechanical response. The relationships between the interfacial properties of fiber/polymethylsiloxane composite, and mechanical properties of the resulting fiber/carbide composites were investigated. The CF/resin interfacial strength was modified by oxidation of CF surface with nitric acid, silanization, and depositing CNT or a pyrolytic carbon layer (PyC). The study of composite interphases (ILSS and SEM) and surface tests of the modified CF (XPS, FT-IR, wettability measurements) showed different nature of the bonding occurring at the fiber/resin and fiber/ceramics boundary. The CF silanization significantly improved the ILSS between CFs and resin by 38.5%, while reduced flexural properties of carbide composites. The most promising treatment method of CF for PIP-based ceramic composites was modification with PyC, which provided 2 times higher ILSS, 1.5 times higher flexural strength and improved work to fracture (WF) as compared to unmodified CF. |
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| Keywords: | Ceramic composites Preceramic polymers Silicon (oxy)carbide Interphase/interface Micromechanics |
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