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Tribological characteristics of self-lubricating nanostructured aluminum reinforced with multi-wall CNTs processed by flake powder metallurgy and hot pressing method

Akbarpour, M. R ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1016/j.diamond.2018.10.004
  3. Publisher: Elsevier Ltd , 2018
  4. Abstract:
  5. Ultrafine-grained Al-CNT (2 and 4 vol%) composites were successfully fabricated using the flake powder metallurgy and hot pressing route, and the microstructure and tribological properties of the produced composites were studied. The results showed that the coefficient of friction and the wear rate of Al decrease with the addition of the CNT reinforcement. A carbon-rich film formed on the worn surfaces during wear test, which prevented the Al oxidation and yielded the self-lubricating effect for the composites. This improvement in the wear behavior of the composites can be attributed to the simultaneous effects of the ultrafine-grained matrix and strengthening and self-lubricating properties of the uniformly dispersed and undamaged CNT in the flake powder metallurgy method. © 2018 Elsevier B.V
  6. Keywords:
  7. Aluminum ; Carbon nanotube ; Flake powder metallurgy ; Metal matrix composites ; Wear ; Aluminum powder metallurgy ; Carbon nanotubes ; Friction ; Metallic matrix composites ; Multiwalled carbon nanotubes (MWCN) ; Powder metals ; Reinforcement ; Tribology ; Wear of materials ; Yarn ; Coefficient of frictions ; Hot pressing method ; Self-lubricating ; Self-lubricating properties ; Simultaneous effects ; Tribological characteristics ; Tribological properties ; Ultra-fine-grained ; Hot pressing
  8. Source: Diamond and Related Materials ; Volume 90 , 2018 , Pages 93-100 ; 09259635 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0925963518305272