Diamond nanoparticles in ethylene glycol lubrication on steel-steel high load contact

Oskari Elomaa (Corresponding Author), Timo J. Hakala, Vesa Myllymäki, Jussi Oksanen, Helena Ronkainen, Vivek K. Singh, Jari Koskinen

    Research output: Contribution to journalArticleScientificpeer-review

    30 Citations (Scopus)


    Nanodiamond dispersions in ethylene glycol were applied in order to improve the boundary lubrication in high power density contacts. A range of nanodiamond concentrations in ethylene glycol were studied by stainless steel vs. stainless steel contact by a pin-on-disc tribometer. As compared to pure ethylene glycol, friction coefficient decreased from 0.16 to 0.11 when maximum concentration (3.7 wt.% of nanodiamonds) and 100 N normal load were applied. A minimum wear for both the disc and counter ball was detected when nanodiamond concentration of 2.2 wt.% or 0.55 wt.% was used. The mechanism of nanodiamond lubrication was determined to be incorporation of nanodiamonds into the tribolayer formation.
    Original languageEnglish
    Pages (from-to)89-94
    JournalDiamond and Related Materials
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed


    • diamond nanoparticles
    • ethylene glycol
    • friction
    • wear


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