Evolution of ZDDP-derived reaction layer morphology with rubbing time

A. Naveira-Suarez, A. Tomala, R. Pasaribu, R. Larsson, I. C. Gebeshuber

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    Functional additives, particularly extreme pressure and antiwear additives, in formulated oil will compete to adsorb and function in tribological contacts. A low-polarity commercial base oil, poly-α-olefin (PAO), blended with zinc dialkyl dithiophosphates (ZDDP) has been studied. The tribological performance was evaluated using a ball-on-disk test rig under mixed rolling-sliding conditions in the boundary lubrication regime at 90°C. An adapted in situ interferometry technique was used to monitor the additive-derived reaction layer formation. The thickness of the reaction layer evolves with rubbing until reaching a limiting thickness value of approximately 70 nm. The evolution of the topography and mechanical properties of the ZDDP-derived reaction layer with rubbing time were studied using Atomic Force Microscopy. A constant roughening and hardening of the additive-derived layer with rubbing time is observed and related to the different tribological performance of the layer at different rubbing times.

    Original languageEnglish
    Pages (from-to)294-303
    Number of pages10
    JournalScanning
    Volume32
    Issue number5
    DOIs
    Publication statusPublished - Sep 2010

    Fingerprint

    Zinc
    zinc
    oils
    boundary lubrication
    Interferometry
    Topography
    Olefins
    Lubrication
    Hardening
    Atomic force microscopy
    hardening
    alkenes
    sliding
    balls
    polarity
    topography
    interferometry
    Mechanical properties
    atomic force microscopy
    mechanical properties

    Keywords

    • additives
    • AFM
    • atomic force microscopy
    • boundary layers formation
    • boundary lubrication
    • morphology
    • nanowear
    • reaction layer
    • ZDDP

    ASJC Scopus subject areas

    • Instrumentation
    • Atomic and Molecular Physics, and Optics

    Cite this

    Naveira-Suarez, A., Tomala, A., Pasaribu, R., Larsson, R., & Gebeshuber, I. C. (2010). Evolution of ZDDP-derived reaction layer morphology with rubbing time. Scanning, 32(5), 294-303. https://doi.org/10.1002/sca.20207

    Evolution of ZDDP-derived reaction layer morphology with rubbing time. / Naveira-Suarez, A.; Tomala, A.; Pasaribu, R.; Larsson, R.; Gebeshuber, I. C.

    In: Scanning, Vol. 32, No. 5, 09.2010, p. 294-303.

    Research output: Contribution to journalArticle

    Naveira-Suarez, A, Tomala, A, Pasaribu, R, Larsson, R & Gebeshuber, IC 2010, 'Evolution of ZDDP-derived reaction layer morphology with rubbing time', Scanning, vol. 32, no. 5, pp. 294-303. https://doi.org/10.1002/sca.20207
    Naveira-Suarez A, Tomala A, Pasaribu R, Larsson R, Gebeshuber IC. Evolution of ZDDP-derived reaction layer morphology with rubbing time. Scanning. 2010 Sep;32(5):294-303. https://doi.org/10.1002/sca.20207
    Naveira-Suarez, A. ; Tomala, A. ; Pasaribu, R. ; Larsson, R. ; Gebeshuber, I. C. / Evolution of ZDDP-derived reaction layer morphology with rubbing time. In: Scanning. 2010 ; Vol. 32, No. 5. pp. 294-303.
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