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Failure analysis of a ceramic ball race bearing made of Y-TZP zirconia.

Harrer, W*; Deluca, M*; Morrell, R (2014) Failure analysis of a ceramic ball race bearing made of Y-TZP zirconia. Eng. Failure Anal., 36. pp. 262-268.

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Full ceramic ball bearings have some advantages compared to conventional steel bearings.They have for instance higher stiffness and hardness, lower density and reduced friction. Because they need less lubrication than steel bearings and owing to their wear and corrosion resistance they are generally materials of choice for pharmaceutical and food industries. In this work a full ceramic bearing that was used in a small mixer in the pharmaceutical industry is investigated. The bearing, consisting of two ZrO2 rings and silicon nitride balls in between, was damaged during service because of premature wear. A failure analysis is performed by fractography and Raman spectroscopy, and it is shown that a stress induced phase transition from the tetragonal to the monoclinic phase was the reason behind the failure of the ZrO2-rings.

Item Type: Article
Keywords: Zircionia, Ceramic, Failure, Fractography, Raman
Subjects: Advanced Materials
Advanced Materials > Microstructural Characterisation
Identification number/DOI: 10.1016/j.engfailanal.2013.10.011
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/6132

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