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A novel aluminum-carbon nanotubes nanocomposite with doubled strength and preserved electrical conductivity

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posted on 18.02.2021, 14:24 by Shuai Zhang, Gaoqiang Chen, Timing Qu, Jinquan Wei, Yufan Yan, Qu Liu, Mengran Zhou, Gong Zhang, Zhaoxia ZhouZhaoxia Zhou, Huan Gao, Dawei Yao, Yuanwang Zhang, Qingyu Shi, Hua ZhangHua Zhang
© 2021, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature. Enhancing the mechanical strength of highly conductive pure metals usually causes significant reduction in their electrical conductivity. For example, introducing phase/matrix interfaces or more grain boundaries, are common and effective methods to strengthen metals. But it simultaneously increases the electron scattering at the interface, thus reducing the electrical conductivity. In this study, we demonstrate that pure aluminum (Al)/carbon nanotubes (CNTs) nanocomposites prepared by friction stir processing have successfully broken through these limitations. The yield strength and tensile strength of Al/CNTs nanocomposites have improved by 104.7% and 51.8% compared to pure Al, while the electrical conductivity remained comparable to that of pure Al. To explore the potential mechanisms, the interface between CNTs and Al was examined and characterized by transmission electron microscopy (TEM) and Raman spectroscopy. Little interfacial reaction compounds were present and no visible physical gaps were observed at CNTs and Al interfaces. We defined it as a clean and tightly bonded interface. Although the quantity of phase interface has increased, the electrical conductivity of the nanocomposite remains approximately unchanged. We attribute the preserved electrical conductivity to the clean and tightly bonded CNTs/Al interface in the nanocomposite. [Figure not available: see fulltext.]

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Nano Research

Volume

14

Issue

8

Pages

2776-2782

Publisher

Springer

Version

AM (Accepted Manuscript)

Rights holder

© Tsinghua University Press and Springer-Verlag

Publisher statement

This is a post-peer-review, pre-copyedit version of an article published in Nano Research. The final authenticated version is available online at: https://doi.org/10.1007/s12274-021-3284-4

Acceptance date

07/12/2020

Publication date

2021-01-20

Copyright date

2021

ISSN

1998-0124

eISSN

1998-0000

Language

en

Depositor

Dr Zhaoxia Zhou. Deposit date: 17 February 2021