Fabrication, mechanical properties and electrical conductivity of Al2O3 reinforced Cu/CNTs composites

Yu Pan, Shi Qi Xiao, Xin Lu, Chuan Zhou, Yang Li, Zhi Wei Liu, Bo Wen Liu, Wei Xu, Cheng Chang Jia, Xuan Hui Qu

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Copper is widely used in many applications due to its excellent electric conductivity, processing ductility and corrosion resistance. However, poor hardness and low strength are the major limitations of copper in many fields. Herein, we report a high-performance copper matrix composites prepared by powder metallurgy. The copper matrix composites were prepared by mixed acid treatment, molecular-level method, ball milling and spark plasma sintering (SPS) process. The fabrication, microstructure, mechanical properties and electrical conductivity of the composites were investigated. The results show that nano-Al2O3 can act as an active mixing agent to disperse CNTs in copper powders and increase the adhesion between CNTs and copper matrix in composites. Additionally, the uniform dispersion of Al2O3 and CNTs can restrict the grain growth and form a strong bonding interface. Thus, the synthesized Cu-1.5CNTs-0.5Al2O3 composite displays the highest comprehensive performance, such as 131 HV hardness, 345 MPa ultimate tensile strength, 324 MPa yield strength, 13.8% elongation, and 50.6 MS/m (87.2%IACS) electrical conductivity. This work provides a feasible way to prepare high-performance copper matrix composites.

Original languageEnglish
Pages (from-to)1015-1023
Number of pages9
JournalJournal of Alloys and Compounds
Volume782
DOIs
Publication statusPublished - 2019 Apr 25

Keywords

  • AlO
  • CNTs
  • Copper matrix composites
  • Powder metallurgy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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  • Cite this

    Pan, Y., Xiao, S. Q., Lu, X., Zhou, C., Li, Y., Liu, Z. W., Liu, B. W., Xu, W., Jia, C. C., & Qu, X. H. (2019). Fabrication, mechanical properties and electrical conductivity of Al2O3 reinforced Cu/CNTs composites. Journal of Alloys and Compounds, 782, 1015-1023. https://doi.org/10.1016/j.jallcom.2018.12.222