Mechanical characterization of copper coated carbon nanotubes reinforced aluminum matrix composites |
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| Affiliation: | 1. Faculty of Materials Science and Engineering, GIK Institute of Engineering Sciences and Technology, Topi 23640, KP, Pakistan;2. School of Nano and Advanced Material Engineering, Changwon National University, Gyeongnam 641-773, Republic of Korea;1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;2. ErichSchmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria;3. Department Materials Physics, MontanuniversitätLeoben, Jahnstraße 12, A-8700 Leoben, Austria;4. Department of Manufacturing and Civil Engineering, Norwegian University of Science and Technology, Teknologivegen 22, 2815 Gjovik, Norway;1. Unité Matériaux Et Transformations, UMR CNRS 8207, Université Lille1, 59655 Villeneuve d''Ascq, France;2. LSPM, CNRS, Université Paris 13, Sorbonne Paris Cité, 99 Avenue J.B. Clément, 93430 Villetaneuse, France |
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| Abstract: | In this investigation, carbon nanotube (CNT) reinforced aluminum composites were prepared by the molecular-level mixing process using copper coated CNTs. The mixing of CNTs was accomplished by ultrasonic mixing and ball milling. Electroless Cu-coated CNTs were used to enhance the interfacial bonding between CNTs and aluminum. Scanning electron microscope analysis revealed the homogenous dispersion of Cu-coated CNTs in the composite samples compared with the uncoated CNTs. The samples were pressureless sintered under vacuum followed by hot rolling to promote the uniform microstructure and dispersion of CNTs. In 1.0 wt.% uncoated and Cu-coated CNT/Al composites, compared to pure Al, the microhardness increased by 44% and 103%, respectively. As compared to the pure Al, for 1.0 wt.% uncoated CNT/Al composite, increase in yield strength and ultimate tensile strength was estimated about 58% and 62%, respectively. However, in case of 1.0 wt.% Cu-coated CNT/Al composite, yield strength and ultimate tensile strength were increased significantly about 121% and 107%, respectively. |
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