Frictional properties of self-adaptive chromium doped tungsten-sulfur-carbon coatings at nanoscale

J. Zekonyte, A. Cavaleiro, T. Polcar

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    Abstract

    Transition metal dichalcogenides (TMD) are excellent dry lubricants forming thin (∼10 nm) tribolayer that simultaneously protects the coating from environmental attack and provides low friction. In this paper, we focus on nanoscale frictional properties of chromium doped tungsten–sulfur–carbon (WSC–Cr) coatings with various Cr content. Friction force microscopy was used to investigate friction force as a function of load. A non-linear contact area dependence on the normal force was observed. The calculated interfacial shear strength was relatively low in the region of 70–99 MPa. Friction coefficient decreased with increased applied load independently of chromium content in the coatings.
    Original languageEnglish
    Pages (from-to)381-387
    JournalApplied Surface Science
    Volume303
    Early online date12 Mar 2014
    DOIs
    Publication statusPublished - 1 Jun 2014

    Keywords

    • Atomic force microscopy
    • Friction force microscopy
    • Nanoscale friction
    • Magnetron sputtering
    • WSC/Cr

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