Tribology of thin coatings

Kenneth Holmberg (Corresponding Author), Helena Ronkainen, Allan Matthews

    Research output: Contribution to journalReview ArticleScientificpeer-review

    193 Citations (Scopus)

    Abstract

    The fundamentals of coating tribology are presented in a generalised holistic approach to friction and wear mechanisms of coated surfaces in dry sliding contacts. This is based on a classification of the tribological contact process into macromechanical, micromechanical, tribochemical contact mechanisms and material transfer. The tribological contact process is dominated by the macromechanical mechanisms, which have been systematically analysed by using four main parameters: the coating-to-substrate hardness relationship, the film thickness, the surface roughnesses and the debris in the contact. The description covers both soft and hard coatings with thicknesses typically in the range 0.1–50 μm, where the interaction between the coating and the substrate is essential to the tribological behaviour. The concept is supported by experimental observations. The important influence of thin tribo- and transfer layers formed during the sliding action is shown. Optimal surface design both regarding friction and wear can be achieved by new multilayer techniques giving reduced stresses, improved adhesion to substrate, more flexible coatings and harder and smoother surfaces. The differences in contact mechanisms in dry, water- and oil lubricated contacts with coated surfaces is illustrated by experimental results from diamond-like coatings sliding against a steel ball. The mechanisms of the formation of dry transfer- and tribolayers and lubricated boundary and reaction films are discussed.

    Original languageEnglish
    Pages (from-to)787 - 795
    Number of pages9
    JournalCeramics International
    Volume26
    Issue number7
    DOIs
    Publication statusPublished - 2000
    MoE publication typeA2 Review article in a scientific journal

    Fingerprint

    Tribology
    Coatings
    Substrates
    Wear of materials
    Friction
    Hard coatings
    Diamond
    Steel
    Debris
    Film thickness
    Diamonds
    Multilayers
    Oils
    Adhesion
    Surface roughness
    Hardness
    Water

    Cite this

    Holmberg, Kenneth ; Ronkainen, Helena ; Matthews, Allan. / Tribology of thin coatings. In: Ceramics International. 2000 ; Vol. 26, No. 7. pp. 787 - 795.
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    Tribology of thin coatings. / Holmberg, Kenneth (Corresponding Author); Ronkainen, Helena; Matthews, Allan.

    In: Ceramics International, Vol. 26, No. 7, 2000, p. 787 - 795.

    Research output: Contribution to journalReview ArticleScientificpeer-review

    TY - JOUR

    T1 - Tribology of thin coatings

    AU - Holmberg, Kenneth

    AU - Ronkainen, Helena

    AU - Matthews, Allan

    PY - 2000

    Y1 - 2000

    N2 - The fundamentals of coating tribology are presented in a generalised holistic approach to friction and wear mechanisms of coated surfaces in dry sliding contacts. This is based on a classification of the tribological contact process into macromechanical, micromechanical, tribochemical contact mechanisms and material transfer. The tribological contact process is dominated by the macromechanical mechanisms, which have been systematically analysed by using four main parameters: the coating-to-substrate hardness relationship, the film thickness, the surface roughnesses and the debris in the contact. The description covers both soft and hard coatings with thicknesses typically in the range 0.1–50 μm, where the interaction between the coating and the substrate is essential to the tribological behaviour. The concept is supported by experimental observations. The important influence of thin tribo- and transfer layers formed during the sliding action is shown. Optimal surface design both regarding friction and wear can be achieved by new multilayer techniques giving reduced stresses, improved adhesion to substrate, more flexible coatings and harder and smoother surfaces. The differences in contact mechanisms in dry, water- and oil lubricated contacts with coated surfaces is illustrated by experimental results from diamond-like coatings sliding against a steel ball. The mechanisms of the formation of dry transfer- and tribolayers and lubricated boundary and reaction films are discussed.

    AB - The fundamentals of coating tribology are presented in a generalised holistic approach to friction and wear mechanisms of coated surfaces in dry sliding contacts. This is based on a classification of the tribological contact process into macromechanical, micromechanical, tribochemical contact mechanisms and material transfer. The tribological contact process is dominated by the macromechanical mechanisms, which have been systematically analysed by using four main parameters: the coating-to-substrate hardness relationship, the film thickness, the surface roughnesses and the debris in the contact. The description covers both soft and hard coatings with thicknesses typically in the range 0.1–50 μm, where the interaction between the coating and the substrate is essential to the tribological behaviour. The concept is supported by experimental observations. The important influence of thin tribo- and transfer layers formed during the sliding action is shown. Optimal surface design both regarding friction and wear can be achieved by new multilayer techniques giving reduced stresses, improved adhesion to substrate, more flexible coatings and harder and smoother surfaces. The differences in contact mechanisms in dry, water- and oil lubricated contacts with coated surfaces is illustrated by experimental results from diamond-like coatings sliding against a steel ball. The mechanisms of the formation of dry transfer- and tribolayers and lubricated boundary and reaction films are discussed.

    U2 - 10.1016/S0272-8842(00)00015-8

    DO - 10.1016/S0272-8842(00)00015-8

    M3 - Review Article

    VL - 26

    SP - 787

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    JO - Ceramics International

    JF - Ceramics International

    SN - 0272-8842

    IS - 7

    ER -