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Enhanced tensile properties and electrical conductivity of Cu-CNT nanocomposites processed via the combination of flake powder metallurgy and high pressure torsion methods

Akbarpour, M. R ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.msea.2019.138888
  3. Publisher: Elsevier Ltd , 2020
  4. Abstract:
  5. Using flake powder metallurgy (FPM) technique, combined with high pressure torsion, super high strength-ductile Cu-CNT nanocomposite with high electrical conductivity is developed. The nanocomposite with 4 vol% CNT showed high tensile strength of ~474 MPa, high electrical conductivity of ~82.5% IACS as well as appreciable ductility of ~11%. According to microstructural studies, the excellent properties of the nanocomposite are attributed to the formation of trimodal grains, high density of twin and low angle grain boundaries, improvement in CNT and Cu interfacial bonding, and appropriate distribution and maintaining the microstructure of the nanotubes in the production process. The results of this work provide a new pathway to produce strong, conductive, and ductile metal matrix nanocomposites. © 2019 Elsevier B.V
  6. Keywords:
  7. Carbon nanotube ; Copper ; Flake powder metallurgy ; High pressure torsion (HPT) ; Nanocomposite ; Strengthening ; Carbon nanotubes ; Grain boundaries ; Metallic matrix composites ; Metals ; Nanocomposites ; Powder metallurgy ; Powder metals ; Strengthening (metal) ; Tensile strength ; Torsional stress ; Cnt nano composites ; Electrical conductivity ; High electrical conductivity ; High pressure torsions ; High-tensile strength ; Interfacial bonding ; Low angle grain boundaries ; Super high strength ; Electric conductivity of solids
  8. Source: Materials Science and Engineering A ; Volume 773 , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0921509319316685#!