Electromagnetic characteristics and microstructure stability of Nextel 610 fiber after heat treatment |
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| Affiliation: | 1. College of Materials, Fujian Key Laboratory of Advanced Materials, Xiamen University, Xiamen, 361005, China;2. Key Laboratory of High Performance Ceramic Fibers (Xiamen University), Ministry of Education, Xiamen, 361005, China;3. School of Materials Science and Energy Engineering, Foshan University, Foshan, 528000, China;1. Key laboratory for Liquid–Solid Structural Evolution & Processing of Materials of Ministry of Education, Shandong University, Jingshi Road 17923, Jinan 250061, Shandong, China;2. Key laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Jingshi Road 17923, Jinan 250061, Shandong, China;1. Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany;2. Institute of Textile Chemistry and Chemical Fibers, Körschtalstraße 26, D-73770 Denkendorf, Germany;3. Institute of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany;1. Herakles, Rue de Touban, Les cinq chemins, F-33185 Le Haillan, France;2. ONERA-The French Aerospace Lab, 29 avenue de la Division Leclerc, F-92322 Châtillon, France;3. Université de Bordeaux, 351 Cours de la Libération, F-33400 Talence, France;4. Laboratoire des Composites Thermo-Structuraux, CNRS UMR 5801, Université de Bordeaux, 3 rue de La Boétie, F-33600 Pessac, France |
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| Abstract: | The thermal and microstructure stability of Nextel 610 fibers has great influence on high-temperature application of Nextel 610 fiber-reinforced ceramic matrix composites. In this work, Nextel 610 fibers were heat treated at 500–700 °C in vacuum and 800–1100 °C in Ar atmosphere, respectively. The sizing agent on Nextel 610 fiber surface could be decomposed into pyrolytic carbon, SiC and gaseous little molecules at lower temperatures, otherwise it was decomposed mainly in the form of gaseous little molecules at higher temperatures, so that the complex permittivity firstly increased and then decreased with the increasing of temperatures. The results showed that the annealed Nextel 610 fiber (T>900 °C) could be regarded as electromagnetic wave transparent fibers, while the tensile strength had declined by half when the temperature increased to 1100 °C. Therefore, Nextel 610 fibers after being annealed at higher temperatures could be further used as reinforcement to prepare high temperature ceramic matrix composites for electromagnetic wave absorption and transparent applications. |
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| Keywords: | Nextel 610 fiber Electromagnetic property Microstructure Heat treatment Sizing agent |
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