期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 117, 期 -, 页码 139-145出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2015.04.014
关键词
Carbon fibres; Carbon nanotubes; Nano composites; Mechanical properties; Hierarchical composites
资金
- Airbus Group
- Boeing
- Embraer
- Lockheed Martin
- Saab AB
- Ansys
- Hexcel
- TohoTenax through MIT's Nano-Engineered Composite aerospace STructures (NECST) Consortium
- MRSEC Program of the National Science Foundation [DMR-0819762]
- U.S. Army Research Office [W911NF-07-D-0004]
Hybrid hierarchical carbon-nanotube (CNT)-based composites, such as radially-aligned CNT arrays grown onto microfiber filaments, have significant potential to expand the performance and functionality of fiber reinforced composites. Here, a novel method for high-yield growth of aligned CNTs on aerospace-grade carbon fibers (CFs) is demonstrated at the composite level for the first time. Fuzzy carbon fiber reinforced plastics (fuzzy CFRP) unidirectional composites with >60% microfiber volume fraction are fabricated via vacuum-assisted resin infusion of CNT-grafted tows using an unmodified aerospace-grade epoxy. Preservation of microfiber tensile modulus and strength are demonstrated by longitudinal composite tensile testing, consistent with single-fiber tensile tests. Fiber matrix interface strength is also unchanged by the CNT growth as revealed through continuously-monitored fiber fragmentation tests. Taken together, the results provide needed new composite-level understanding of hierarchical structural composite laminates and motivate future work on structural CF composite laminates with integrated multi-functionality and improved interlaminar and intralaminar performance. (C) 2015 Elsevier Ltd. All rights reserved.
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