Wear and friction of transformation-toughened CMC and MMC

N. L. Savchenko, P. V. Korolev, A. G. Melnikov, S. Yu Tarasov, S. N. Kulkov

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    8 Citations (Scopus)

    Abstract

    The sliding wear properties of transformation-toughened CMC and MMC coupled with high-speed steel have been studied at speeds in the range 0.9-9.4 m/s for MMC and 0.2-11.1 m/s for CMC and at a pressure of 5 MPa. It was shown that at low sliding speeds (0.2-4 m/s), both friction coefficient and wear rate of the yttria-doped tetragonal zirconia polycrystal ceramics (Y-TZP) increased with sliding speed and then decreased after reaching the maximum. The wear rate of TiC-NiTi increases with the increase in the sliding speed in the range of 0.9-9.4 m/s, whereas the friction coefficient followed an inverse trend. At low speeds, the tribological behavior of both ceramics and hard was controlled by the action of the transformation-toughening mechanism. In case of ceramics, a continuous transfer layer formed to serve as a protective transfer layer on the specimen surface during high-speed wear. In case of TiC-NiTi, softened or even melted binder is extruded from an interparticle area onto pin/disk interface and thus determines wear behavior of such a system at sliding speed higher than 4 m/s.

    Original languageEnglish
    Pages (from-to)892-900
    Number of pages9
    JournalWear
    Volume249
    Issue number10-11
    DOIs
    Publication statusPublished - 2001

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    Keywords

    • Adhesion
    • Transfer layer
    • Transformation-toughened materials
    • Wear
    • Zirconia

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Materials Chemistry

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