Fabrication of carbon nanotube reinforced Al composites with well-balanced strength and ductility

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[1] [2,Yang, Xudong
[2] Liu, Enzuo
[3] Shi, Chunsheng
[4] He, Chunnian
[5] Li, Jiajun
[6] 1,Zhao, Naiqin
[7] Kondoh, Katsuyoshi
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Zhao, N. (nqzhao@tju.edu.cn) | 1600年 / Elsevier Ltd卷 / 563期
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An approach was developed to fabricate carbon nanotube (CNT)-reinforced Al composites. In a typical process; the Co catalyst was evenly deposited on the surface of Al powder by impregnation route; and then the CNTs were grown in the Al powder by chemical vapor deposition to obtain CNT/Al powders. After ball-milling of the obtained powders for a short time; the CNT/Al composites were fabricated by compacting; sintering and hot extrusion of the ball-milled powders. During this process; the well dispersed CNT reinforcement is deeply embedded in the Al powder forming an effective interface bonding with matrix. As a result; the CNT/Al composites containing 2.5 wt.% CNTs exhibit the ultimate tensile strength of 334 MPa which is 1.7 times higher than that of unreinforced Al; and good ductility of ∼18% elongation to failure. Thus; well-balanced strength and ductility are achieved in CNT-reinforced Al composites.© 2013 Elsevier B.V. All rights reserved;
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