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Open AccessArticle

Influence of Carbyne Content on the Mechanical Performance of Nanothick Amorphous Carbon Coatings

1
Department of Mechanical Engineering, CEMMPRE, University of Coimbra, Rua Luis Reis Santos, 3030-788 Coimbra, Portugal
2
CeFEMA-Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 780; https://doi.org/10.3390/nano10040780
Received: 28 March 2020 / Revised: 16 April 2020 / Accepted: 16 April 2020 / Published: 18 April 2020
(This article belongs to the Section Synthesis, Interfaces and Nanostructures)
This study concerns the evaluation of the coefficient of friction, at different temperatures, of amorphous carbon thin films, deposited onto nanocrystalline sputtered copper coatings by clean-technology rf magnetron sputtering. The aim is to access the capacity of carbon thin films, with different contents of sp2 and sp1 bonds, to act as a solid lubricant for copper surfaces. Raman spectroscopy revealed that all the as-deposited coatings consist of amorphous carbon with low defect content and decreasing carbyne concentration with increasing thickness. The tribological tests at 25 °C and 200 °C revealed that, for the higher temperature, the 15 nm carbon coating present 0.001 friction coefficients at 2 N load. Overall, the study presents a one-step technology for the greener production of solid lubrication systems for micro- and nano-components, avoiding the environmental impact of lubricants. View Full-Text
Keywords: 2D carbon thin films; sp1 carbon bonds; nanocrystalline copper coating; zero coefficient of friction 2D carbon thin films; sp1 carbon bonds; nanocrystalline copper coating; zero coefficient of friction
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MDPI and ACS Style

Piedade, A.P.; Cangueiro, L. Influence of Carbyne Content on the Mechanical Performance of Nanothick Amorphous Carbon Coatings. Nanomaterials 2020, 10, 780.

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