Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures

J. Oksanen, Timo J. Hakala, S. Tervakangas, Petri Laakso, Lauri Kilpi, Helena Ronkainen, J. Koskinen (Corresponding Author)

    Research output: Contribution to journalArticleScientificpeer-review

    33 Citations (Scopus)

    Abstract

    The possibility of enhancing the tribological properties of ta-C at elevated temperature (250 °C) by laser surface texturing and burnished WS2 addition were investigated. Laser texturing was applied prior to ta-C coating process. Samples were tribologically tested at room temperature and elevated (250 °C) temperature using pin-on-disc. WS2 addition increased remarkably the wear life of ta-C at 250 °C and low COF values (0.01–0.02) were achieved. Laser surface texturing (LST) increased the wear life of WS2/ta-C surfaces by more than two times compared to non-textured surface. The LST dimples functioned as solid lubricant reservoirs and improved the wear life of the initial WS2 layer. This was noticed to be related to wear mechanism with raised position dimples and partly oxidized WS2.
    Original languageEnglish
    Pages (from-to)94-103
    Number of pages10
    JournalTribology International
    Volume70
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Texturing
    Wear of materials
    Lasers
    lasers
    Temperature
    temperature
    solid lubricants
    Solid lubricants
    coating
    Coatings
    room temperature

    Keywords

    • friction
    • laser surface texturing
    • ta-C
    • WS2

    Cite this

    @article{7b0a234e2f734f7c9e23ffe5c1dc6135,
    title = "Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures",
    abstract = "The possibility of enhancing the tribological properties of ta-C at elevated temperature (250 °C) by laser surface texturing and burnished WS2 addition were investigated. Laser texturing was applied prior to ta-C coating process. Samples were tribologically tested at room temperature and elevated (250 °C) temperature using pin-on-disc. WS2 addition increased remarkably the wear life of ta-C at 250 °C and low COF values (0.01–0.02) were achieved. Laser surface texturing (LST) increased the wear life of WS2/ta-C surfaces by more than two times compared to non-textured surface. The LST dimples functioned as solid lubricant reservoirs and improved the wear life of the initial WS2 layer. This was noticed to be related to wear mechanism with raised position dimples and partly oxidized WS2.",
    keywords = "friction, laser surface texturing, ta-C, WS2",
    author = "J. Oksanen and Hakala, {Timo J.} and S. Tervakangas and Petri Laakso and Lauri Kilpi and Helena Ronkainen and J. Koskinen",
    year = "2014",
    doi = "10.1016/j.triboint.2013.09.005",
    language = "English",
    volume = "70",
    pages = "94--103",
    journal = "Tribology International",
    issn = "0301-679X",
    publisher = "Elsevier",

    }

    Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures. / Oksanen, J.; Hakala, Timo J.; Tervakangas, S.; Laakso, Petri; Kilpi, Lauri; Ronkainen, Helena; Koskinen, J. (Corresponding Author).

    In: Tribology International, Vol. 70, 2014, p. 94-103.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures

    AU - Oksanen, J.

    AU - Hakala, Timo J.

    AU - Tervakangas, S.

    AU - Laakso, Petri

    AU - Kilpi, Lauri

    AU - Ronkainen, Helena

    AU - Koskinen, J.

    PY - 2014

    Y1 - 2014

    N2 - The possibility of enhancing the tribological properties of ta-C at elevated temperature (250 °C) by laser surface texturing and burnished WS2 addition were investigated. Laser texturing was applied prior to ta-C coating process. Samples were tribologically tested at room temperature and elevated (250 °C) temperature using pin-on-disc. WS2 addition increased remarkably the wear life of ta-C at 250 °C and low COF values (0.01–0.02) were achieved. Laser surface texturing (LST) increased the wear life of WS2/ta-C surfaces by more than two times compared to non-textured surface. The LST dimples functioned as solid lubricant reservoirs and improved the wear life of the initial WS2 layer. This was noticed to be related to wear mechanism with raised position dimples and partly oxidized WS2.

    AB - The possibility of enhancing the tribological properties of ta-C at elevated temperature (250 °C) by laser surface texturing and burnished WS2 addition were investigated. Laser texturing was applied prior to ta-C coating process. Samples were tribologically tested at room temperature and elevated (250 °C) temperature using pin-on-disc. WS2 addition increased remarkably the wear life of ta-C at 250 °C and low COF values (0.01–0.02) were achieved. Laser surface texturing (LST) increased the wear life of WS2/ta-C surfaces by more than two times compared to non-textured surface. The LST dimples functioned as solid lubricant reservoirs and improved the wear life of the initial WS2 layer. This was noticed to be related to wear mechanism with raised position dimples and partly oxidized WS2.

    KW - friction

    KW - laser surface texturing

    KW - ta-C

    KW - WS2

    U2 - 10.1016/j.triboint.2013.09.005

    DO - 10.1016/j.triboint.2013.09.005

    M3 - Article

    VL - 70

    SP - 94

    EP - 103

    JO - Tribology International

    JF - Tribology International

    SN - 0301-679X

    ER -