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Sliding wear of YTZP ceramic against steel: observations on ceramic transfer and wear transition

Ravikiran, A and Bai, Pramila BN (1995) Sliding wear of YTZP ceramic against steel: observations on ceramic transfer and wear transition. In: Journal of Materials Science (full set), 30 (8). pp. 1999-2007.

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Sliding tests were conducted, in air, of YTZP ceramic pins against steel discs at an applied pressure of 15.5 MPa over a speed range of 0.3 to 4.0 ms(-1). Pin wear was not detectable until 2.0 m s(-1), after which a finite but small wear rate was observed at 3.0 m s(-1), accompanied by a red glow at the contacting surface. A transition in wear behaviour and friction (mu) occurred at 4.0 ms(-1), increasing the former by over two orders of magnitude. Both mu and wear behaviour changed with time at 4.0 m s(-1). During initial periods mu was high and wear rate increased steadily with time accompanied by ceramic transfer onto the disc, which increased with time. When disc coverage exceeds a certain threshold value, mu decreased rapidly and the wear rate stabilized at a very high value. Metal transfer was not observed at any speed. High surface temperatures brought about significant adhesion between TZP and steel and this together with enhanced plastic deformation brought about a transition in wear behaviour.

Item Type: Journal Article
Publication: Journal of Materials Science (full set)
Publisher: Springer
Additional Information: Copyright of this article belongs to Springer.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 26 May 2011 07:14
Last Modified: 26 May 2011 07:14
URI: http://eprints.iisc.ac.in/id/eprint/37901

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