Preparation, Mechanical Properties and Electrical Conductivity of Carbon Nanotube Reinforced Cu Matrix Composites

Chuan Zhou, Xin Lu, Chengchang Jia, Bowen Liu

Research output: Contribution to journalArticlepeer-review

Abstract

The copper based composite powders containing 0.5%~2% (mass fraction) CNTs were prepared by mixed acid treatment, two steps mixing process of molecular-level method and planetary ball milling using CNTs, electrolytic Cu powder and Cu(CH3COO)2•H2O as raw materials, and the Cu-CNTs composites were prepared by spark plasma sintering. The influence of preparation process and CNTs content on the microstructure, electrical conductivity and mechanical properties of Cu-CNTs composites were studied. The results show that when CNTs content is less than 1.0%, Cu-CNTs composite powders prepared by two-step mixing process have good homogeneity and good dispersibility. The Cu-CNTs composites with high density and uniform CNTs were obtained after sintering. When the content of CNTs is more than 1.0%, the densities and the uniformity of CNTs obviously decrease. With the increase of the CNTs content, the strength of composites increases in initial stage and then declines, and the plasticity and electrical conductivity tend to decrease. Compared with the composites prepared by high-energy ball milling and molecular level method, the Cu-1.0%CNTs composites prepared by two-step method exhibits the superior mechanical properties, including the electrical conductivity of 51.7 MS/m (89.1%IACS), the hardness of 1130 MPa, the tensile strength of 279 MPa, and the elongation of 9.8%.

Original languageEnglish
Pages (from-to)1249-1255
Number of pages7
JournalXiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume48
Issue number4
Publication statusPublished - 2019 Apr 1
Externally publishedYes

Keywords

  • Carbon nanotube
  • Cu matrix composites
  • Electrical conductivity
  • Mechanical properties
  • Two-step mixing process

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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