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Mechanical, tribological and electrical properties of Cu-CNT composites fabricated by flake powder metallurgy method

Akbarpour, M. R ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.acme.2019.02.005
  3. Publisher: Elsevier B.V , 2019
  4. Abstract:
  5. Cu-CNT composites were fabricated by a flake powder metallurgy method, and their microhardness, electrical conductivity, frictional and wear properties were investigated. Homogenous distribution of CNTs in fine-grained Cu matrix was obtained using this process. Microhardness increased with the addition of CNT vol% up to 8% to the Cu matrix, while the conductivity decreased to 79.2 IACS %. Results showed that CNTs play a major role in improving wear resistance by forming a CNT-rich film that acts as a solid lubricant layer. In the synthesized composites, Cu- 4 vol% CNT composite exhibited the best wear and friction properties. The dominant wear mechanisms for the Cu-CNT composites were plastic deformation, abrasion, and flake formation-spalling. Also, a newly modified correlation was proposed for the theoretical calculation of the friction coefficient of Cu-CNT composites consisting agglomerated CNTs. © 2019 Politechnika Wrocławska
  6. Keywords:
  7. Carbon nanotube ; Electrical conductivity ; Flake powder metallurgy ; Metal matrix composites ; Wear ; Electric conductivity ; Fabrication ; Friction ; Metallic matrix composites ; Metals ; Microhardness ; Powder metallurgy ; Powder metals ; Solid lubricants ; Tribology ; Wear of materials ; Wear resistance ; Yarn ; Cnt composites ; Fine grained ; Friction coefficients ; Theoretical calculations ; Wear and friction ; Wear mechanisms ; Wear properties ; Carbon nanotubes
  8. Source: Archives of Civil and Mechanical Engineering ; Volume 19, Issue 3 , 2019 , Pages 694-706 ; 16449665 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S164496651930024X