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Fabrication and mechanical properties of CNT/Al composites via shift-speed ball milling and hot-rolling

Published online by Cambridge University Press:  16 July 2019

Chao Yuan
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Zhanqiu Tan*
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Genlian Fan
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Mingliang Chen
Affiliation:
Shanghai Key Laboratory of Spacecraft Mechanism, Aerospace System Engineering Shanghai, Shanghai 201108, China
Quan Zheng
Affiliation:
Shanghai Key Laboratory of Spacecraft Mechanism, Aerospace System Engineering Shanghai, Shanghai 201108, China
Zhiqiang Li*
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
a)Address all correspondence to these authors. e-mail: tanzhanqiu@sjtu.edu.cn
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Abstract

Flat products of carbon nanotubes (CNTs) reinforced Al matrix composites were fabricated using flake powder metallurgy via shift-speed ball milling and hot-rolling. The evolution of CNTs during preparation and the final distribution in the Al matrix were investigated, and the effect of CNT content on mechanical properties were discussed. Due to the combined effect of uniform dispersion of CNTs, structural integrity, interfacial bonding and directional alignment, the balance between high strength and ductility was successfully achieved in the annealed rolled composites with 1.5 wt% CNT addition, with the value of 382.6 MPa in tensile strength and 9.8% in fracture ductility. The load transfer strengthening was the main mechanism of the strength enhancement with CNTs addition. In addition, a strong rotated cube {001}〈110〉 texture was found in the final flat product of rolled composites. This study provides an effective route to produce and improve the mechanical properties of CNT/Al flat products.

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Article
Copyright
Copyright © Materials Research Society 2019 

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