Lightweight carbon-bonded carbon fiber composites with quasi-layered and network structure |
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| Affiliation: | 1. AML, Department of Engineering Mechanics, School of Aerospace Engineering, Tsinghua University, Beijing 100084, PR China;2. Science and Technology on Advanced Composites in Special Environment Laboratory, Harbin Institute of Technology, Harbin 150001, PR China;1. Department of Engineering Mechanics, Harbin University of Science and Technology, Harbin 150080, PR China;2. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, PR China;1. AML, Department of Engineering Mechanics, School of Aerospace Engineering, Tsinghua University, Beijing 100084, PR China;2. Institute of Advanced Structure Technology, Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, PR China;3. Science and Technology on Advanced Composites in Special Environment Laboratory, Harbin Institute of Technology, Harbin 150001, PR China;4. College of Engineering, Peking University, Beijing 100871, PR China;5. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, PR China |
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| Abstract: | Lightweight carbon-bonded carbon fiber (CBCF) composites were fabricated with chopped carbon fibers and dilute phenolic resin solution by pressure filtration, followed by carbonization at 1000 °C in argon. The as-prepared CBCF composites had a homogenous fiber network distribution in xy direction and quasi-layered structure in z direction. The pyrolytic carbon derived from phenolic resin was mainly accumulated at the intersections and surfaces of chopped carbon fibers. The composites possessed compressive strengths ranged from 0.93–6.63 MPa in xy direction to 0.30–2.01 MPa in z direction with a density of 0.162–0.381 g cm− 3. The thermal conductivity increased from 0.314–0.505 to 0.139–0.368 Wm− 1 K− 1 in xy and z directions, respectively. The experimental results indicate that the CBCF composites prepared by this technique can significantly contribute to improve the thermal insulation and mechanical properties at high temperature. |
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