Hybrid carbon nanotube–carbon fiber composites with improved in-plane mechanical properties |
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| Affiliation: | 1. Department of Engineering Science and Mechanics, Virginia Tech, Blacksburg, VA 24061, USA;2. Department of Mechanical Engineering, University of New Mexico, Albuquerque, NM 87131, USA;1. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. Kompetenzzentrum Holz GmbH (Wood K plus), Division Wood Polymer Composites, Altenberger Straße 69, 4040 Linz, Austria;2. Christian Doppler Laboratory for Microscopic and Spectroscopic Material Characterization (CDL-MS-MACH), Center for Surface and Nanoanalytics (ZONA), Johannes Kepler University (JKU) Linz, Altenberger Straße 69, 4040 Linz, Austria;1. Department of Aeronautics and Astronautics, MIT 77 Mass. Ave., Bldg. 35-220, USA;2. Department of Materials & Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel;3. Department of Aeronautics and Astronautics, MIT 77 Mass. Ave., Bldg. 33-408, USA;1. Laboratory for Mechanical Systems Engineering, Empa, Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland;2. Chair of Material Science and Testing of Polymers, Montanuniversity Leoben, Otto Glöckel-Strasse 2, A-8700 Leoben, Austria |
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| Abstract: | In this study carbon nanotubes (CNTs) were grown on carbon fibers to enhance the in-plane and out-of-plane properties of fiber reinforced polymer composites (FRPs). A relatively low temperature synthesis technique was utilized to directly grow CNTs over the carbon fibers. Several composites based on carbon fibers with different surface treatments (e.g. growing CNTs with different lengths and distribution patterns and coating the fibers with a thermal barrier coating (TBC) layer) were fabricated and characterized via on- and off-axis tensile tests. The on-axis tensile strength and ductility of the hybrid FRPs were improved by 11% and 35%, respectively, due to the presence of the TBC and the surface grown CNTs. This configuration also exhibited 16% improvement on the off-axis stiffness. Results suggest that certain CNT growth patterns and lengths are more pertinent than the other surface treatments to achieve superior mechanical properties. |
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| Keywords: | A Carbon fiber D Mechanical testing A Nano-structures E Surface treatments |
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