Graphene oxide in water lubrication on diamond-like carbon vs. stainless steel high-load contacts

Oskari Elomaa (Corresponding Author), Vivek K. Singh, Ajai Iyer, Timo J. Hakala, Jari Koskinen

    Research output: Contribution to journalArticleScientificpeer-review

    61 Citations (Scopus)

    Abstract

    The friction and wear performance of 0-2 wt.% graphene oxide (GO) dispersions in water were studied on diamond-like carbon vs. stainless steel contact by a pin-on-disk tribometer. Thewear surfaceswere characterized using contact profilometry, X-ray spectroscopy, optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, and Raman spectroscopy. The friction coefficient decreased 57% (from 0.14 to 0.06) compared to pure water, when 1 wt.% of GO and 10 N normal load were applied. A minimum wear for the counter ball was detected when pure water was used. GO additives reduced the corrosive effect on the counter ball. The main tribological mechanism of GO additives in water was observed to be the embedding of GO sheets on the counter ball surface forming a lubricating layer and binding water molecules into the contact.
    Original languageEnglish
    Pages (from-to)43-48
    JournalDiamond and Related Materials
    Volume52
    DOIs
    Publication statusPublished - 2015
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Graphene oxide
    • Diamond-like carbon
    • Water lubrication
    • Friction
    • Wear

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