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  • Surface fatigue of ceramics in ball-on-strip rolling test
    Kalin, Mitjan ; Vižintin, Jože
    Modern machinery demand reliable load bearing contacts, which could operate at high service temperatures, extreme contact pressures, marginal lubrication and harsh environmental conditions. Ceramics ... could mostly withstand such conditions but are still very expensive, primarily due to surface finishing processes, which remain a challenge for the future. Surface fatigue of silicon nitride ceramics under dry rolling conditions was studied. Effect of different grinding conditions on the surface damage was investigated and compared to rolling fatigue of polished surfaces. New "Ball-on-Strip" testing principle used in this investigation is also presented in the paper. Loading arm of our device moves linearly reciprocatingly and rolls the ball over the flat specimen. Instead of expensive discs, rods or similar specimens, flats are used in our experiments. Such specimens are small and could be relatively easily machined due to their simple geometry. This is very advantageous for expensive ceramics specimens.
    Type of material - conference contribution
    Publish date - 1999
    Language - english
    COBISS.SI-ID - 3131931