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

Jari Koskinen, Unto Tapper, Peter Andersson, Simo Varjus, Jukka Kolehmainen, Sanna Tervakangas, Wolfgang Buss

    Research output: Contribution to conferenceConference articleScientific

    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
    Pages3794-3797
    Publication statusPublished - 2009
    MoE publication typeNot Eligible
    EventAsian-European International Conference on Plasma Surface Engineering, AEPSE 2009 - Busan, Korea, Democratic People's Republic of
    Duration: 20 Sep 200925 Sep 2009

    Conference

    ConferenceAsian-European International Conference on Plasma Surface Engineering, AEPSE 2009
    Abbreviated titleAEPSE 2009
    CountryKorea, Democratic People's Republic of
    CityBusan
    Period20/09/0925/09/09

    Fingerprint

    Texturing
    Steel
    Lubrication
    Amorphous carbon
    Oils
    Friction
    Coatings
    Pore size
    Lubricants
    Wear of materials
    Carbon films
    Metal forming
    Amorphous films
    Powders
    Carbon
    Metals
    Vacuum
    Geometry
    Substrates
    Processing

    Cite this

    Koskinen, J., Tapper, U., Andersson, P., Varjus, S., Kolehmainen, J., Tervakangas, S., & Buss, W. (2009). Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. 3794-3797. Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of.
    Koskinen, Jari ; Tapper, Unto ; Andersson, Peter ; Varjus, Simo ; Kolehmainen, Jukka ; Tervakangas, Sanna ; Buss, Wolfgang. / Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of.
    @conference{c31c60341c054a26bc05c4b75b3b6aee,
    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.",
    author = "Jari Koskinen and Unto Tapper and Peter Andersson and Simo Varjus and Jukka Kolehmainen and Sanna Tervakangas and Wolfgang Buss",
    note = "Project code: G3SU00165; Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, AEPSE 2009 ; Conference date: 20-09-2009 Through 25-09-2009",
    year = "2009",
    language = "English",
    pages = "3794--3797",

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    Koskinen, J, Tapper, U, Andersson, P, Varjus, S, Kolehmainen, J, Tervakangas, S & Buss, W 2009, 'Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication', Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of, 20/09/09 - 25/09/09 pp. 3794-3797.

    Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. / Koskinen, Jari; Tapper, Unto; Andersson, Peter; Varjus, Simo; Kolehmainen, Jukka; Tervakangas, Sanna; Buss, Wolfgang.

    2009. 3794-3797 Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of.

    Research output: Contribution to conferenceConference articleScientific

    TY - CONF

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

    AU - Koskinen, Jari

    AU - Tapper, Unto

    AU - Andersson, Peter

    AU - Varjus, Simo

    AU - Kolehmainen, Jukka

    AU - Tervakangas, Sanna

    AU - Buss, Wolfgang

    N1 - Project code: G3SU00165

    PY - 2009

    Y1 - 2009

    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.

    M3 - Conference article

    SP - 3794

    EP - 3797

    ER -

    Koskinen J, Tapper U, Andersson P, Varjus S, Kolehmainen J, Tervakangas S et al. Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. 2009. Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of.