Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication

J. Koskinen (Corresponding Author), Unto Tapper, Peter Andersson, Simo Varjus, J. Kolehmainen, S. Tervakangas, W. Buss

    Research output: Contribution to journalArticleScientificpeer-review

    17 Citations (Scopus)

    Abstract

    It has been demonstrated that tetrahedral amorphous carbon (ta-C) films provide excellent wear and friction properties in dry sliding. Recently the applications of ta-C coatings in lubricated conditions have become more important. The use of carbon coatings aims at reducing the wear and coefficient of friction under minimum lubrication and without hazardous lubricant additives. For optimum tribological performance, a modification of the ta-C coated surfaces is required. The present paper describes an innovative method of coated surface texturing, by which nanometer and micrometer size pores are processed by various methods. Particle masking was used for processing micrometer size pores and for controlling the coating growth conditions in order to produce nanometer size pores in the ta-C surface. The masking by particles yielded a pore geometry which varied from complex shaped channels to small individual pores. The texturing was performed by distributing metallic powder particles on the surface or by direct chemical deposition of metal particles on the substrate in prior to pulsed vacuum arc deposition. The tribological characterization was carried out by applying reciprocating friction tests with controlled lubricant replenishment, in order to simulate metal forming processes. The friction reducing effect, which was observed in the tribological tests, indicated a microlubrication effect of the textured coating surfaces.
    Original languageEnglish
    Pages (from-to)3794-3797
    Number of pages4
    JournalSurface and Coatings Technology
    Volume204
    Issue number23
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    friction reduction
    Texturing
    Steel
    lubrication
    Lubrication
    Amorphous carbon
    sliding
    Oils
    oils
    steels
    Friction
    porosity
    coatings
    Coatings
    carbon
    Pore size
    friction
    lubricants
    masking
    Lubricants

    Keywords

    • Lubrication
    • Pulsed plasma deposition
    • Surface texturing
    • Tribology

    Cite this

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    title = "Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication",
    abstract = "It has been demonstrated that tetrahedral amorphous carbon (ta-C) films provide excellent wear and friction properties in dry sliding. Recently the applications of ta-C coatings in lubricated conditions have become more important. The use of carbon coatings aims at reducing the wear and coefficient of friction under minimum lubrication and without hazardous lubricant additives. For optimum tribological performance, a modification of the ta-C coated surfaces is required. The present paper describes an innovative method of coated surface texturing, by which nanometer and micrometer size pores are processed by various methods. Particle masking was used for processing micrometer size pores and for controlling the coating growth conditions in order to produce nanometer size pores in the ta-C surface. The masking by particles yielded a pore geometry which varied from complex shaped channels to small individual pores. The texturing was performed by distributing metallic powder particles on the surface or by direct chemical deposition of metal particles on the substrate in prior to pulsed vacuum arc deposition. The tribological characterization was carried out by applying reciprocating friction tests with controlled lubricant replenishment, in order to simulate metal forming processes. The friction reducing effect, which was observed in the tribological tests, indicated a microlubrication effect of the textured coating surfaces.",
    keywords = "Lubrication, Pulsed plasma deposition, Surface texturing, Tribology",
    author = "J. Koskinen and Unto Tapper and Peter Andersson and Simo Varjus and J. Kolehmainen and S. Tervakangas and W. Buss",
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    language = "English",
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    pages = "3794--3797",
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    Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. / Koskinen, J. (Corresponding Author); Tapper, Unto; Andersson, Peter; Varjus, Simo; Kolehmainen, J.; Tervakangas, S.; Buss, W.

    In: Surface and Coatings Technology, Vol. 204, No. 23, 2010, p. 3794-3797.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication

    AU - Koskinen, J.

    AU - Tapper, Unto

    AU - Andersson, Peter

    AU - Varjus, Simo

    AU - Kolehmainen, J.

    AU - Tervakangas, S.

    AU - Buss, W.

    N1 - Project code: G3SU00165

    PY - 2010

    Y1 - 2010

    N2 - It has been demonstrated that tetrahedral amorphous carbon (ta-C) films provide excellent wear and friction properties in dry sliding. Recently the applications of ta-C coatings in lubricated conditions have become more important. The use of carbon coatings aims at reducing the wear and coefficient of friction under minimum lubrication and without hazardous lubricant additives. For optimum tribological performance, a modification of the ta-C coated surfaces is required. The present paper describes an innovative method of coated surface texturing, by which nanometer and micrometer size pores are processed by various methods. Particle masking was used for processing micrometer size pores and for controlling the coating growth conditions in order to produce nanometer size pores in the ta-C surface. The masking by particles yielded a pore geometry which varied from complex shaped channels to small individual pores. The texturing was performed by distributing metallic powder particles on the surface or by direct chemical deposition of metal particles on the substrate in prior to pulsed vacuum arc deposition. The tribological characterization was carried out by applying reciprocating friction tests with controlled lubricant replenishment, in order to simulate metal forming processes. The friction reducing effect, which was observed in the tribological tests, indicated a microlubrication effect of the textured coating surfaces.

    AB - It has been demonstrated that tetrahedral amorphous carbon (ta-C) films provide excellent wear and friction properties in dry sliding. Recently the applications of ta-C coatings in lubricated conditions have become more important. The use of carbon coatings aims at reducing the wear and coefficient of friction under minimum lubrication and without hazardous lubricant additives. For optimum tribological performance, a modification of the ta-C coated surfaces is required. The present paper describes an innovative method of coated surface texturing, by which nanometer and micrometer size pores are processed by various methods. Particle masking was used for processing micrometer size pores and for controlling the coating growth conditions in order to produce nanometer size pores in the ta-C surface. The masking by particles yielded a pore geometry which varied from complex shaped channels to small individual pores. The texturing was performed by distributing metallic powder particles on the surface or by direct chemical deposition of metal particles on the substrate in prior to pulsed vacuum arc deposition. The tribological characterization was carried out by applying reciprocating friction tests with controlled lubricant replenishment, in order to simulate metal forming processes. The friction reducing effect, which was observed in the tribological tests, indicated a microlubrication effect of the textured coating surfaces.

    KW - Lubrication

    KW - Pulsed plasma deposition

    KW - Surface texturing

    KW - Tribology

    U2 - 10.1016/j.surfcoat.2010.04.058

    DO - 10.1016/j.surfcoat.2010.04.058

    M3 - Article

    VL - 204

    SP - 3794

    EP - 3797

    JO - Surface and Coatings Technology

    JF - Surface and Coatings Technology

    SN - 0257-8972

    IS - 23

    ER -