Influence of CNTs addition on the mechanical, microstructural, and corrosion properties of Al alloy using spark plasma sintering technique

C. O. Ujah, A. P.I. Popoola, O. M. Popoola, V. S. Aigbodion

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Monolithic aluminium 1000 alloy is used in overhead transmission conductors because of its light weight, high electrical conductivity and high passivation property. But its low strength is a very big challenge to this application. However, the strength can be improved by proper reinforcement in a way that will not compromise other properties. So, this work was focused on improving the strength and corrosion properties of Al alloy with carbon nanotubes (CNTs) using spark plasma sintering (SPS). The start-up powders were blended with tubular mixer and sintered with SPS technique. The densities, microhardness and corrosion characteristics of the sintered samples were determined accordingly. Results obtained showed that there was a homogeneous dispersion of CNTs in the Al matrix of all the samples except Al-8CNTs. Al-4CNTs gave the highest microhardness of 482.60 ± 12 MPa which represented 27% improvement in relation to monolithic Al alloy. Again, Al-4CNTs gave the least corrosion rate of 0.26723 mm/year in NaCl medium and 0.24188 mm/year in H2SO4 medium (46% and 47% improvements, respectively). These results indicate that Al-CNTs composite is a robust material for high transmission conductors.

Original languageEnglish
Pages (from-to)2961-2969
Number of pages9
JournalInternational Journal of Advanced Manufacturing Technology
Volume106
Issue number7-8
DOIs
Publication statusPublished - 1 Feb 2020
Externally publishedYes

Keywords

  • Aluminium alloy
  • Carbon nanotubes
  • Corrosion resistance
  • Microhardness
  • Spark plasma sintering

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering

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