Effect of interface layers formed during dry sliding of zirconia toughened alumina (ZTA) and monolithic alumina against steel

Ravikiran, A and Subbanna, GR and Bai, Pramila BN (1996) Effect of interface layers formed during dry sliding of zirconia toughened alumina (ZTA) and monolithic alumina against steel. In: Wear, 192 (1-2). pp. 56-65.

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Abstract

Dry sliding of zirconia toughened alumina (ZTA) and monolithic alumina against steel has been studied, using a pin-on-disc machine as a function of speed, in the speed range of 0.1-12.0 m $s^{-1}$, at a pressure of 15.5 MPa. Both the materials show four types of frictional behaviour, controlled by the type and extent of the interface layer formed. At low speeds the interface layer is composed of iron and oxides of iron and at high speeds it is composed of tribochemical products such as $FeAlO_3$, and $Fe30_4$. In certain speed ranges the co-efficient of friction shows oscillations in value with time. This is due to the existence of either substantial or very small interfacial layer. Addition of $ZrO_2$, to alumina increases the speed at which wear occurs. However, once wear is measurable the wear rate of ZTA is higher than that of monolithic alumina.

Item Type:	Journal Article
Publication:	Wear
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Interface layers;Dry sliding;Zirconia;Alumina;Steel
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	12 Dec 2006
Last Modified:	19 Sep 2010 04:33
URI:	http://eprints.iisc.ac.in/id/eprint/9071

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