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)
    @inproceedings{5970637191f243e3aa43f695e3b23019,
    title = "Tribological behaviour of carbon thin films against bearing steel under continuous sliding in hydrogen environment",
    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

    SN - 978-1-63439-352-2

    SP - 3098

    EP - 3101

    BT - Proceedings

    ER -

    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