A study of the structure formed by thickeners of greases using atomic force microscope

Michita Hokao, Noriyuki Inami, Eri Watabe, Atsushi Yokouchi, Joichi Sugimura

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    This paper describes an experimental study on quantitative evaluation of correlation between the structure formed by thickeners and yield stress of greases. In order to evaluate the thickener structures, untreated surface of greases was observed by using an atomic force microscope, and an index was obtained from AFM images to describe the degree of dispersion of the thickeners. The index physically represented both factors of shape and distribution of thickeners. The results for twelve types of lithium soap greases with different base oils and thickener concentrations showed good correlation between the index of the degree of dispersion and the yield stress of the greases. This relationship indicated that uniform distribution of thickeners in greases caused higher yield stress.

    Original languageEnglish
    Pages (from-to)76-82
    Number of pages7
    JournalTribology Online
    Volume8
    Issue number1
    DOIs
    Publication statusPublished - 2013

    All Science Journal Classification (ASJC) codes

    • Surfaces, Coatings and Films

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