Influence of Transition Metals Ti and Co on Interfacial Microstructure and Strength of Copper–graphene Composites

XIAN Yong1 CHEN Deping1 DING Yichao1 WANG Jing1 LU Yanhong1

(1.School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu, Sichuan, China 611730)

【Abstract】Transition metals Ti and Co were separately introduced into copper–graphene composites by matrix alloying and powder metallurgy methods. The effects of Ti and Co on the strength of copper–graphene composites were compared by tensile tests. The microstructure and interface structure of copper–graphene composites were characterized by a scanning electron microscope (SEM), a transmission electron microscope (TEM), and a Raman spectrometer. With the addition of Ti, a large number of TiC nanoparticles were formed on the interface, which promoted the interface bonding without increasing graphene defects, and the tensile strength increased from 223 MPa to 256 MPa. Nevertheless, amorphous carbon appeared at the interface of Co-doped composites. It increased graphene defects and was not conducive to play the role of strengthening phase and transferring interface load, resulting in the strength decreased from 223 MPa to 192 MPa.

【Keywords】 copper–graphene composites; Ti; Co; matrix alloying; powder metallurgy; interface structure; strength;

【DOI】

【Funds】 Chunhui Program of the Ministry of Education (Z2017064) Project of Science & Technology Department of Sichuan Province (2018JY0278)

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This Article

ISSN:1004-7638

CN: 51-1245/TF

Vol 41, No. 05, Pages 66-70

October 2020

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Article Outline

Abstract

  • 0 Introduction
  • 1 Experimental
  • 2 Results and discussion
  • 3 Conclusions
  • References