Friction and wear properties of DLC-coated plasma nitrided steel in unidirectional and reciprocating sliding

Bojan Podgornik (Corresponding Author), Jose Vizintin, Helena Ronkainen, Kenneth Holmberg

    Research output: Contribution to journalArticleScientificpeer-review

    30 Citations (Scopus)

    Abstract

    In this study samples of AISI 4140 steel were surface treated by plasma nitriding and coated with a hydrogen-free hard carbon coating, also known as tetrahedral amorphous carbon coating (ta-C). The specimens were investigated with respect to their microhardness, residual stress, coating adhesion and dry sliding wear resistance. Wear tests in which duplex-treated specimens were mated to hardened ball bearing steel were performed under unidirectional and reciprocating sliding. To examine the influence of the nitriding conditions on the performance of duplex-treated steel, the coating was deposited on hardened as well as on plasma nitrided samples, nitrided under two different nitriding conditions. The results show greatly improved sliding wear resistance of plasma-nitrided hard-coated specimens compared with un-coated and pre-hardened ones, observed for both unidirectional and reciprocating sliding. Furthermore, the hydrogen-free hard carbon coating produced a reduction in the coefficient of friction of approximately one order of magnitude. Although previous investigations showed the negative effect of a compound layer, it was found that the compound layer may act as an intermediate hard layer, leading to superior tribological properties of the composite.

    Original languageEnglish
    Pages (from-to)254 - 260
    Number of pages7
    JournalThin Solid Films
    Volume377-378
    DOIs
    Publication statusPublished - 2000
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Steel
    sliding
    friction
    Wear of materials
    steels
    Friction
    nitriding
    Nitriding
    Plasmas
    coatings
    Coatings
    wear resistance
    Wear resistance
    Hydrogen
    carbon
    Carbon
    ball bearings
    Ball bearings
    wear tests
    Amorphous carbon

    Keywords

    • Duplex treatment
    • DLC coating
    • Plasma nitriding
    • Unidirectional sliding
    • Reciprocating sliding

    Cite this

    Podgornik, Bojan ; Vizintin, Jose ; Ronkainen, Helena ; Holmberg, Kenneth. / Friction and wear properties of DLC-coated plasma nitrided steel in unidirectional and reciprocating sliding. In: Thin Solid Films. 2000 ; Vol. 377-378. pp. 254 - 260.
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    abstract = "In this study samples of AISI 4140 steel were surface treated by plasma nitriding and coated with a hydrogen-free hard carbon coating, also known as tetrahedral amorphous carbon coating (ta-C). The specimens were investigated with respect to their microhardness, residual stress, coating adhesion and dry sliding wear resistance. Wear tests in which duplex-treated specimens were mated to hardened ball bearing steel were performed under unidirectional and reciprocating sliding. To examine the influence of the nitriding conditions on the performance of duplex-treated steel, the coating was deposited on hardened as well as on plasma nitrided samples, nitrided under two different nitriding conditions. The results show greatly improved sliding wear resistance of plasma-nitrided hard-coated specimens compared with un-coated and pre-hardened ones, observed for both unidirectional and reciprocating sliding. Furthermore, the hydrogen-free hard carbon coating produced a reduction in the coefficient of friction of approximately one order of magnitude. Although previous investigations showed the negative effect of a compound layer, it was found that the compound layer may act as an intermediate hard layer, leading to superior tribological properties of the composite.",
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    author = "Bojan Podgornik and Jose Vizintin and Helena Ronkainen and Kenneth Holmberg",
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    Friction and wear properties of DLC-coated plasma nitrided steel in unidirectional and reciprocating sliding. / Podgornik, Bojan (Corresponding Author); Vizintin, Jose; Ronkainen, Helena; Holmberg, Kenneth.

    In: Thin Solid Films, Vol. 377-378, 2000, p. 254 - 260.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Friction and wear properties of DLC-coated plasma nitrided steel in unidirectional and reciprocating sliding

    AU - Podgornik, Bojan

    AU - Vizintin, Jose

    AU - Ronkainen, Helena

    AU - Holmberg, Kenneth

    N1 - Project code: V7SU01403

    PY - 2000

    Y1 - 2000

    N2 - In this study samples of AISI 4140 steel were surface treated by plasma nitriding and coated with a hydrogen-free hard carbon coating, also known as tetrahedral amorphous carbon coating (ta-C). The specimens were investigated with respect to their microhardness, residual stress, coating adhesion and dry sliding wear resistance. Wear tests in which duplex-treated specimens were mated to hardened ball bearing steel were performed under unidirectional and reciprocating sliding. To examine the influence of the nitriding conditions on the performance of duplex-treated steel, the coating was deposited on hardened as well as on plasma nitrided samples, nitrided under two different nitriding conditions. The results show greatly improved sliding wear resistance of plasma-nitrided hard-coated specimens compared with un-coated and pre-hardened ones, observed for both unidirectional and reciprocating sliding. Furthermore, the hydrogen-free hard carbon coating produced a reduction in the coefficient of friction of approximately one order of magnitude. Although previous investigations showed the negative effect of a compound layer, it was found that the compound layer may act as an intermediate hard layer, leading to superior tribological properties of the composite.

    AB - In this study samples of AISI 4140 steel were surface treated by plasma nitriding and coated with a hydrogen-free hard carbon coating, also known as tetrahedral amorphous carbon coating (ta-C). The specimens were investigated with respect to their microhardness, residual stress, coating adhesion and dry sliding wear resistance. Wear tests in which duplex-treated specimens were mated to hardened ball bearing steel were performed under unidirectional and reciprocating sliding. To examine the influence of the nitriding conditions on the performance of duplex-treated steel, the coating was deposited on hardened as well as on plasma nitrided samples, nitrided under two different nitriding conditions. The results show greatly improved sliding wear resistance of plasma-nitrided hard-coated specimens compared with un-coated and pre-hardened ones, observed for both unidirectional and reciprocating sliding. Furthermore, the hydrogen-free hard carbon coating produced a reduction in the coefficient of friction of approximately one order of magnitude. Although previous investigations showed the negative effect of a compound layer, it was found that the compound layer may act as an intermediate hard layer, leading to superior tribological properties of the composite.

    KW - Duplex treatment

    KW - DLC coating

    KW - Plasma nitriding

    KW - Unidirectional sliding

    KW - Reciprocating sliding

    U2 - 10.1016/S0040-6090(00)01302-X

    DO - 10.1016/S0040-6090(00)01302-X

    M3 - Article

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    JO - Thin Solid Films

    JF - Thin Solid Films

    SN - 0040-6090

    ER -