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A Novel Method to Fabricate CNT/Mg–6Zn Composites with High Strengthening Efficiency

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

A novel method was developed to fabricate carbon nanotubes (CNTs)-reinforced Mg matrix composites. The method consists of two steps: CNTs pre-dispersion by ball-milling and the ultrasonic melt processing. Mechanical ball-milling effectively pre-dispersed CNTs on Zn flakes with suitable rotational speed and ball-milling time. Serious CNT entanglements were dispersed by the ball-milling. However, ball-milling for a long time at high speed would damage the morphology of CNTs. The ultrasonic overcame the poor wettability between Mg melt and CNTs and then dispersed pre-dispersed CNTs in the Mg melt. CNTs were distributed well in the composites and maintained integrated structure. CNTs significantly improved the mechanical properties of the matrix. The strengthening efficiency reached to 37.1, which proves the superiority of this novel method. Besides grain refinement, load transfer may make a great contribution to the improvement of the strength for the composites.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51101043 and 51471059), Key Project of Science and Technology Department of Heilongjiang Province of China (No. GC12A109), and the China Postdoctoral Science Foundation (No. 2013M531035 and 2014T70328).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

    Hailong Shi, Xiaojun Wang, Chendong Li, Xiaoshi Hu, Chao Ding & Kun Wu

  2. School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, 150001, China

    Xiaojun Wang & Yudong Huang

Authors
  1. Hailong Shi
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  2. Xiaojun Wang
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  3. Chendong Li
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  4. Xiaoshi Hu
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  5. Chao Ding
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  6. Kun Wu
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  7. Yudong Huang
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Correspondence to Xiaojun Wang.

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Available online at http://link.springer.com/journal/40195

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Shi, H., Wang, X., Li, C. et al. A Novel Method to Fabricate CNT/Mg–6Zn Composites with High Strengthening Efficiency. Acta Metall. Sin. (Engl. Lett.) 27, 909–917 (2014). https://doi.org/10.1007/s40195-014-0144-1

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  • DOI: https://doi.org/10.1007/s40195-014-0144-1

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