Tribological behaviour of carbon thin films against bearing steel under continuous sliding in hydrogen environment

Antti Vaajoki, H. Tanaka, Simo Varjus, Helena Ronkainen, J. Sugimura

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

2 Citations (Scopus)

Abstract

Carbon thin films such as diamond like carbon (DLC) coatings have been studied extensively for many years and they are already utilized in applications where low friction and low wear are needed. Yet, the understanding of the tribological behaviour of the carbon coatings in hydrogen environment is limited. This study concentrates on the tribological behaviour of the hydrogen-free and hydrogenated diamond like carbon films against bearing steel under continuous sliding in hydrogen environment. The tribological experiments using pin-on-disc test rig showed that DLC coatings provide lower friction coefficient and lower wear rate than uncoated 100Cr6 when sliding against 100Cr6 pin in hydrogen environment. The hydrogen environment can however be influencing the adhesion behaviour of the DLC coatings detrimentally causing delamination of the coating. The increase in water impurity level of hydrogen does not show to affect the friction coefficient of the DLC coatings significantly. Nevertheless, based on this study it can be said that the a-C:H coatings provide more stable friction behaviour compared to the ta-C type coatings when sliding against steel pin in hydrogen environment regardless of the water impurity level.
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publication5th World Tribology Congress, WTC 2013
Pages3098-3101
Publication statusPublished - 2013
MoE publication typeNot Eligible
Event5th World Tribology Congress, WTC 2013 - Torino, Italy
Duration: 8 Sep 201313 Sep 2013
Conference number: 5

Conference

Conference5th World Tribology Congress, WTC 2013
Abbreviated titleWTC 2013
CountryItaly
CityTorino
Period8/09/1313/09/13

Fingerprint

Bearings (structural)
Carbon films
Thin films
Coatings
Hydrogen
Steel
Diamonds
Carbon
Friction
Wear of materials
Impurities
Diamond like carbon films
Delamination
Water
Adhesion

Keywords

  • DLC
  • hydrogen
  • tribology

Cite this

Vaajoki, A., Tanaka, H., Varjus, S., Ronkainen, H., & Sugimura, J. (2013). Tribological behaviour of carbon thin films against bearing steel under continuous sliding in hydrogen environment. In Proceedings: 5th World Tribology Congress, WTC 2013 (pp. 3098-3101)
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abstract = "Carbon thin films such as diamond like carbon (DLC) coatings have been studied extensively for many years and they are already utilized in applications where low friction and low wear are needed. Yet, the understanding of the tribological behaviour of the carbon coatings in hydrogen environment is limited. This study concentrates on the tribological behaviour of the hydrogen-free and hydrogenated diamond like carbon films against bearing steel under continuous sliding in hydrogen environment. The tribological experiments using pin-on-disc test rig showed that DLC coatings provide lower friction coefficient and lower wear rate than uncoated 100Cr6 when sliding against 100Cr6 pin in hydrogen environment. The hydrogen environment can however be influencing the adhesion behaviour of the DLC coatings detrimentally causing delamination of the coating. The increase in water impurity level of hydrogen does not show to affect the friction coefficient of the DLC coatings significantly. Nevertheless, based on this study it can be said that the a-C:H coatings provide more stable friction behaviour compared to the ta-C type coatings when sliding against steel pin in hydrogen environment regardless of the water impurity level.",
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Vaajoki, A, Tanaka, H, Varjus, S, Ronkainen, H & Sugimura, J 2013, Tribological behaviour of carbon thin films against bearing steel under continuous sliding in hydrogen environment. in Proceedings: 5th World Tribology Congress, WTC 2013. pp. 3098-3101, 5th World Tribology Congress, WTC 2013, Torino, Italy, 8/09/13.

Tribological behaviour of carbon thin films against bearing steel under continuous sliding in hydrogen environment. / Vaajoki, Antti; Tanaka, H.; Varjus, Simo; Ronkainen, Helena; Sugimura, J.

Proceedings: 5th World Tribology Congress, WTC 2013. 2013. p. 3098-3101.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Tribological behaviour of carbon thin films against bearing steel under continuous sliding in hydrogen environment

AU - Vaajoki, Antti

AU - Tanaka, H.

AU - Varjus, Simo

AU - Ronkainen, Helena

AU - Sugimura, J.

N1 - Project code: 78682

PY - 2013

Y1 - 2013

N2 - Carbon thin films such as diamond like carbon (DLC) coatings have been studied extensively for many years and they are already utilized in applications where low friction and low wear are needed. Yet, the understanding of the tribological behaviour of the carbon coatings in hydrogen environment is limited. This study concentrates on the tribological behaviour of the hydrogen-free and hydrogenated diamond like carbon films against bearing steel under continuous sliding in hydrogen environment. The tribological experiments using pin-on-disc test rig showed that DLC coatings provide lower friction coefficient and lower wear rate than uncoated 100Cr6 when sliding against 100Cr6 pin in hydrogen environment. The hydrogen environment can however be influencing the adhesion behaviour of the DLC coatings detrimentally causing delamination of the coating. The increase in water impurity level of hydrogen does not show to affect the friction coefficient of the DLC coatings significantly. Nevertheless, based on this study it can be said that the a-C:H coatings provide more stable friction behaviour compared to the ta-C type coatings when sliding against steel pin in hydrogen environment regardless of the water impurity level.

AB - Carbon thin films such as diamond like carbon (DLC) coatings have been studied extensively for many years and they are already utilized in applications where low friction and low wear are needed. Yet, the understanding of the tribological behaviour of the carbon coatings in hydrogen environment is limited. This study concentrates on the tribological behaviour of the hydrogen-free and hydrogenated diamond like carbon films against bearing steel under continuous sliding in hydrogen environment. The tribological experiments using pin-on-disc test rig showed that DLC coatings provide lower friction coefficient and lower wear rate than uncoated 100Cr6 when sliding against 100Cr6 pin in hydrogen environment. The hydrogen environment can however be influencing the adhesion behaviour of the DLC coatings detrimentally causing delamination of the coating. The increase in water impurity level of hydrogen does not show to affect the friction coefficient of the DLC coatings significantly. Nevertheless, based on this study it can be said that the a-C:H coatings provide more stable friction behaviour compared to the ta-C type coatings when sliding against steel pin in hydrogen environment regardless of the water impurity level.

KW - DLC

KW - hydrogen

KW - tribology

M3 - Conference article in proceedings

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Vaajoki A, Tanaka H, Varjus S, Ronkainen H, Sugimura J. Tribological behaviour of carbon thin films against bearing steel under continuous sliding in hydrogen environment. In Proceedings: 5th World Tribology Congress, WTC 2013. 2013. p. 3098-3101