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Synergistic role of carbon nanotube and SiCn reinforcements on mechanical properties and corrosion behavior of Cu-based nanocomposite developed by flake powder metallurgy and spark plasma sintering process

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

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  1. Type of Document: Article
  2. DOI: 10.1016/j.msea.2020.139395
  3. Publisher: Elsevier Ltd , 2020
  4. Abstract:
  5. Hybrid-reinforced metals are novel composite materials in which nano-phases including nanoparticles and nanotubes/nanosheets are used simultaneously to reinforce metals or alloys to enhance physical, mechanical, wear and other properties. In this research, Cu/(CNT-SiC) hybrid nanocomposite was synthesized using flake powder metallurgy and spark plasma sintering method and the effects of hybrid reinforcements on microstructural, wear and corrosion properties of the developed material were investigated and compared with those of copper. Microstructural characterization showed reduction of average grain size from 419 to 307 nm and increase of low angle grain boundaries with the introduction and homogeneous dispersion of hybrid reinforcements. Mechanical tests indicated that the addition of hybrid SiC and CNT reinforcements substantially increased microhardness and reduced wear rate and friction coefficient of the Cu. Also, polarization and EIS tests revealed the suppressing of the anodic dissolution of the matrix, hindering the oxygen reduction reaction and 62.5% improvement of corrosion rate for the composite material. The effects of hybrid nano-reinforcements are presented and discussed. © 2020 Elsevier B.V
  6. Keywords:
  7. Carbon nanotube (CNT) ; Copper ; Corrosion ; Mechanical properties ; Metal matrix composites (MMC) ; Spark plasma sintering ; Composite materials ; Copper corrosion ; Corrosion rate ; Corrosive effects ; Electrochemical corrosion ; Electrolytic reduction ; Friction ; Grain boundaries ; Hybrid materials ; Metal nanoparticles ; Metals ; Nanocomposites ; Powder metallurgy ; Powder metals ; Reinforcement ; Silicon ; Silicon carbide ; Silicon compounds ; Wear of materials ; Friction coefficients ; Homogeneous dispersions ; Hybrid nanocomposites ; Hybrid reinforcements ; Low angle grain boundaries ; Micro-structural characterization ; Spark plasma sintering method ; Spark plasma sintering process ; Carbon nanotubes
  8. Source: Materials Science and Engineering A ; Volume 786 , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0921509320304767#!