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Structure and tribology of biocompatible Ti–C:H coatings

Structure and tribology of biocompatible Ti–C:H coatings
Structure and tribology of biocompatible Ti–C:H coatings
Ti–C:H coatings with different carbon content for biomedical applications were deposited by PECVD. Ti was varied by magnetron sputtering a Ti-target with different power in a dc discharge regime having Ar in the atmosphere. Ti–C:H coating was tribologically tested reflecting its expected use as an interlayer for improving the adhesion of functional a-C:H coatings. The tribological properties were studied using a pin-on-disc CSM Tribometer in order to ensure stable tribological properties of the whole Ti–C:H/DLC system for any case of top layer failure. The sliding tests were carried out at room temperature in room environment with relative air humidity 40 ± 5%, in 0.9% NaCl water solution (physiological solution, PS) and in 10% fetal bovine serum (FBS) dissolved in Ringer's saline solution using 440C steel balls with a diameter of 8 mm. The variation of the C2H2 flow led to carbon contents in the range [18–91 at.%]. The Ti-rich coatings exhibited poor wear resistance, while the best tribological properties were achieved for TiC/a-C:H coatings deposited with the highest C2H2 flows. When tested in biological solutions, the friction and wear resistance were analyzed with respect to their corrosion properties
Ti–C:H coatings, tribology, physiological solution, fetal bovine serum
0257-8972
5790-5793
Vitu, Tomas
88797aca-ef7c-4ef7-8dd0-913551b18f10
Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Cvrek, Ladislav
db777b10-824d-4c6c-b837-784544a8e681
Novak, Rudolf
e493f2d5-b721-432f-ac71-d120b1282a03
Macak, Jan
0e1d96b0-a173-492c-8d5a-17591e9c8df3
Vyskocil, Jiri
694e2cc8-35ba-4357-b00a-ae9a20228f17
Cavaleiro, Alabano
2e660bd3-25e0-4ea5-b1fd-79b0b06b3ce3
Vitu, Tomas
88797aca-ef7c-4ef7-8dd0-913551b18f10
Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Cvrek, Ladislav
db777b10-824d-4c6c-b837-784544a8e681
Novak, Rudolf
e493f2d5-b721-432f-ac71-d120b1282a03
Macak, Jan
0e1d96b0-a173-492c-8d5a-17591e9c8df3
Vyskocil, Jiri
694e2cc8-35ba-4357-b00a-ae9a20228f17
Cavaleiro, Alabano
2e660bd3-25e0-4ea5-b1fd-79b0b06b3ce3

Vitu, Tomas, Polcar, Tomas, Cvrek, Ladislav, Novak, Rudolf, Macak, Jan, Vyskocil, Jiri and Cavaleiro, Alabano (2008) Structure and tribology of biocompatible Ti–C:H coatings. [in special issue: Sixth Asian-European International Conference on Plasma Surface Engineering] Surface and Coatings Technology, 202 (22-23), 5790-5793. (doi:10.1016/j.surfcoat.2008.06.040).

Record type: Article

Abstract

Ti–C:H coatings with different carbon content for biomedical applications were deposited by PECVD. Ti was varied by magnetron sputtering a Ti-target with different power in a dc discharge regime having Ar in the atmosphere. Ti–C:H coating was tribologically tested reflecting its expected use as an interlayer for improving the adhesion of functional a-C:H coatings. The tribological properties were studied using a pin-on-disc CSM Tribometer in order to ensure stable tribological properties of the whole Ti–C:H/DLC system for any case of top layer failure. The sliding tests were carried out at room temperature in room environment with relative air humidity 40 ± 5%, in 0.9% NaCl water solution (physiological solution, PS) and in 10% fetal bovine serum (FBS) dissolved in Ringer's saline solution using 440C steel balls with a diameter of 8 mm. The variation of the C2H2 flow led to carbon contents in the range [18–91 at.%]. The Ti-rich coatings exhibited poor wear resistance, while the best tribological properties were achieved for TiC/a-C:H coatings deposited with the highest C2H2 flows. When tested in biological solutions, the friction and wear resistance were analyzed with respect to their corrosion properties

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More information

e-pub ahead of print date: 9 June 2008
Published date: 30 August 2008
Keywords: Ti–C:H coatings, tribology, physiological solution, fetal bovine serum
Organisations: nCATS Group

Identifiers

Local EPrints ID: 199781
URI: http://eprints.soton.ac.uk/id/eprint/199781
ISSN: 0257-8972
PURE UUID: 53666cb2-665e-4b25-a900-f0e54cc219cb
ORCID for Tomas Polcar: ORCID iD orcid.org/0000-0002-0863-6287

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Date deposited: 20 Oct 2011 12:59
Last modified: 15 Mar 2024 03:40

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Contributors

Author: Tomas Vitu
Author: Tomas Polcar ORCID iD
Author: Ladislav Cvrek
Author: Rudolf Novak
Author: Jan Macak
Author: Jiri Vyskocil
Author: Alabano Cavaleiro

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