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Wear of engineering ceramics by a soft abrasive

Lookup NU author(s): Emeritus Professor Trevor Page


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The wear behaviour of a number of engineering ceramics sliding against polyethyleneterephthalate (PET) has been examined. Microscopical examination of the worn surfaces has shown a wide distribution of size of grooves, from 50 nm to 1 μm. The smaller grooves seem to be made by anatase particles in the PET sheet. The larger grooves are made by particles ejected from the samples' surfaces by a fatigue mechanism. By relating the hardness of the engineering ceramics at a scale appropriate to the measured wear rates, some degree of agreement found. Further, it was found that the near-surface hardness of all the materials was lower than the macroscopic hardness values: the sole exception was anatase. Although the macroscopic hardness values of anatase were much lower than the alumina-based ceramics, the near-surface hardness values became relatively greater. In this way, what was originally thought to be a "soft" ceramic can now abrade a nominally "harder" one. The wear of the carbides is thought to be by an oxidation-assisted process.

Publication metadata

Author(s): Czernuszka JT, Page TF

Publication type: Article

Publication status: Published

Journal: Journal of Materials Science

Year: 1997

Volume: 32

Issue: 24

Pages: 6671-6680

ISSN (print): 0022-2461

ISSN (electronic): 1573-4803

Publisher: Springer New York LLC


DOI: 10.1023/A:1018612705988


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