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Carbon-based coatings doped by copper: Tribological and mechanical behavior in olive oil lubrication

Carbon-based coatings doped by copper: Tribological and mechanical behavior in olive oil lubrication
Carbon-based coatings doped by copper: Tribological and mechanical behavior in olive oil lubrication
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 200,000 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).

0257-8972
S79-S83
Balestra, R.M.
e9bf7969-6d69-4c4f-a08d-a54fd2558fa8
Castro, A.M.G.
63ae2b93-216b-46f2-8897-d90eea817b29
Evaristo, M.
ad10848a-2415-413e-b5f9-ed28d055ef60
Escudeiro, A.
b256ff7b-3f46-4b67-9a4b-ddcfe5900b7f
Mutafov, Petr
e7969ea0-8c2a-417b-90ae-817f2c483dab
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Cavaleiro, A.
114e42eb-7255-47ef-834d-0546d56d3171
Balestra, R.M.
e9bf7969-6d69-4c4f-a08d-a54fd2558fa8
Castro, A.M.G.
63ae2b93-216b-46f2-8897-d90eea817b29
Evaristo, M.
ad10848a-2415-413e-b5f9-ed28d055ef60
Escudeiro, A.
b256ff7b-3f46-4b67-9a4b-ddcfe5900b7f
Mutafov, Petr
e7969ea0-8c2a-417b-90ae-817f2c483dab
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Cavaleiro, A.
114e42eb-7255-47ef-834d-0546d56d3171

Balestra, R.M., Castro, A.M.G., Evaristo, M., Escudeiro, A., Mutafov, Petr, Polcar, T. and Cavaleiro, A. (2011) Carbon-based coatings doped by copper: Tribological and mechanical behavior in olive oil lubrication. Surface and Coatings Technology, 205, S79-S83. (doi:10.1016/j.surfcoat.2011.01.053).

Record type: Article

Abstract

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 200,000 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).

Full text not available from this repository.

More information

Published date: 25 July 2011
Organisations: nCATS Group

Identifiers

Local EPrints ID: 199833
URI: https://eprints.soton.ac.uk/id/eprint/199833
ISSN: 0257-8972
PURE UUID: dc19198e-4777-4a84-9cc3-6e5e36c5d69a
ORCID for T. Polcar: ORCID iD orcid.org/0000-0002-0863-6287

Catalogue record

Date deposited: 20 Oct 2011 10:22
Last modified: 19 Nov 2019 01:39

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