Surface treatment of CFRP composites using femtosecond laser radiation |
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| Institution: | 1. Center of Physics and Engineering of Advanced Materials (CeFEMA), Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. Instituto Superior de Engenharia de Lisboa, Avenida Conselheiro Emídio Navarro No. 1, 1959-007 Lisboa, Portugal;3. Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;4. DEMec, FEUP, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;5. Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias 400, 4200-465 Porto, Portugal;1. NASA Langley Research Center, MS226, Hampton, VA 23681-2199, USA;2. The Boeing Company, Seattle, WA 98124-2207, USA;1. Airbus, Central Research & Technology, Munich, Germany;2. Institute of Joining and Welding, Technische Universität Braunschweig, Braunschweig, Germany;3. Airbus Defence and Space GmbH, Space Systems, Mechanical Subsystems and R&T FHN, Friedrichshafen, Germany;1. King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), COHMAS Laboratory, Thuwal 23955-6900, Saudi Arabia;2. Department of Mechanical, Energy and Management Engineering, University of Calabria, 87036 Rende, CS, Italy;1. INEGI - Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;2. Center of Physics and Engineering of Advanced Materials (CeFEMA), Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;3. Instituto Superior de Engenharia de Lisboa, Av. Conselheiro Emídio Navarro No. 1, 1959-007 Lisboa, Portugal;4. Faculdade de Engenharia da Universidade do Porto, Departamento de Engenharia Mecânica, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;5. Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;1. Department of Mechanical Engineering, Tokyo University of Technology, 1404-1, Katakura-chou, Hachiouji-shi, Tokyo 192-0914, Japan;2. Joining and Welding Research Institute, Osaka University, 11-1, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan |
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| Abstract: | In the present work, we investigate the surface treatment of carbon fiber-reinforced polymer (CFRP) composites by laser ablation with femtosecond laser radiation. For this purpose, unidirectional carbon fiber-reinforced epoxy matrix composites were treated with femtosecond laser pulses of 1024 nm wavelength and 550 fs duration. Laser tracks were inscribed on the material surface using pulse energies and scanning speeds in the range 0.1–0.5 mJ and 0.1–5 mm/s, respectively. The morphology of the laser treated surfaces was investigated by field emission scanning electron microscopy. We show that, by using the appropriate processing parameters, a selective removal of the epoxy resin can be achieved, leaving the carbon fibers exposed. In addition, sub-micron laser induced periodic surface structures (LIPSS) are created on the carbon fibers surface, which may be potentially beneficial for the improvement of the fiber to matrix adhesion in adhesive bonds between CFRP parts. |
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| Keywords: | CFRP composites Surface treatment Femtosecond laser |
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