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https://hdl.handle.net/10316/21195
Título: | Carbon-based coatings doped by copper: Tribological and mechanical behavior in olive oil lubrication | Autor: | Balestra, R. M. Castro, A. M. G. Evaristo, M. Escudeiro, A. Mutafov, Petr Polcar, T. Cavaleiro, A. |
Palavras-chave: | DLC; Cu; Wettability; Tribology; Olive oil | Data: | Jul-2011 | Editora: | Elsevier | Citação: | BALESTRA, R. M. [et al.] - Carbon-based coatings doped by copper: Tribological and mechanical behavior in olive oil lubrication. "Surface and Coatings Technology". ISSN 0257-8972. Vol. 205, Supl. 2 (2011) p. S79-S83 | Título da revista, periódico, livro ou evento: | Surface and Coatings Technology | Volume: | 205, Supl. 2 | Resumo: | We deposited C-based films doped with Cu and tested their sliding properties in olive oil as environment-friendly lubricant, which can be used in many mechanical systems, particularly in agriculture engineering. The coatings were deposited in a four unbalanced magnetron sputtering device combining C and C/Cu targets; argon (hydrogen-free films) and Ar/CH4 (hydrogenated films) atmospheres were used. Cu content of the films was in the range 5-14 at.%. The hardness of the films was almost constant whatever the Cu content was. On the other hand, hydrogen-free coatings were much harder (about 15 GPa) than hydrogenated ones (about 4 GPa). The coatings were oleophilic and their sliding properties were evaluated using ball-on-plate tests with 200000 cycles. The non-hydrogenated coating with 6 at.% of copper showed the best tribological performance with negligible wear for all olive oil testing temperatures (i.e. up to 120 °C). | URI: | https://hdl.handle.net/10316/21195 | ISSN: | 0257-8972 | DOI: | 10.1016/j.surfcoat.2011.01.053 | Direitos: | openAccess |
Aparece nas coleções: | I&D CEMMPRE - Artigos em Revistas Internacionais FCTUC Eng.Mecânica - Artigos em Revistas Internacionais |
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Carbon-based coatings doped by copper.pdf | 255.77 kB | Adobe PDF | Ver/Abrir |
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