The influence of carbon based coatings and surface finish on the tribological performance in high-load contacts

H. Ronkainen (Corresponding Author), O. Elomaa, S. Varjus, L. Kilpi, T. Jaatinen, J. Koskinen

    Research output: Contribution to journalArticleScientificpeer-review

    13 Citations (Scopus)

    Abstract

    The effect of surface finish with two types of carbon based coatings was evaluated in rolling contact twin disc tests. The surface finish grades represented the ground surface, and two polished surfaces providing average surface roughness values of Ra 0.128. µm and 0.030. µm. The twin disc test parameters were selected to represent the contact parameters of practical gear contacts with the maximum contact pressure of 1.7. GPa. The micropitting could be prohibited by polishing the surfaces or by using surface coatings. With the optimised combination of surface roughness and carbon coating the reduction of 27% in friction coefficient could be achieved with improved wear performance in twin disc tests.
    Original languageEnglish
    Pages (from-to)402-409
    JournalTribology International
    Volume96
    DOIs
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed

    Keywords

    • coating
    • friction
    • polishing
    • surface roughness

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