Effect of ball-milling time on mechanical properties of carbon nanotubes reinforced aluminum matrix composites |
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| Authors: | ZY Liu SJ Xu BL Xiao P Xue WG Wang ZY Ma |
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| Affiliation: | 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;1. School of Metallurgy and Materials Engineering, University of Science and Technology (IUST), Iran;2. Center of Excellence for High Strength Alloys Technology (CEHSAT), School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), 16846-13114, Narmak, Tehran, Iran |
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| Abstract: | Carbon nanotubes reinforced pure Al (CNT/Al) composites were produced by ball-milling and powder metallurgy. Microstructure and its evolution of the mixture powders and the fabricated composites were examined and the mechanical properties of the composites were tested. It was indicated that the CNTs were gradually dispersed into the Al matrix as ball-milling time increased and achieved a uniform dispersion after 6 h ball-milling. Further increasing the ball-milling time to 8–12 h resulted in serious damage to the CNTs. The tensile tests showed that as the ball-milling time increased, the tensile and yield strengths of the composites increased, while the elongation increased first and then decreased. The strengthening of CNTs increased significantly as the ball-milling time increased to 6 h, and then decreased when further increasing the ball-milling time. The yield strength of the composite with 6 h ball-milling increased by 42.3% compared with the matrix. |
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