Friction behaviour of solid oxide lubricants as second phase in alpha-Al2O3 and stabilised ZrO2 composites

Kerkwijk, Bas and Garcia, Monserrat and Zyl van, Werner E. and Winnubst, Louis and Mulder, Elmer J. and Schipper, Dik J. and Verweij, Henk (2004) Friction behaviour of solid oxide lubricants as second phase in alpha-Al2O3 and stabilised ZrO2 composites. Wear, 256 (1-2). pp. 182-189. ISSN 0043-1648

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Abstract:	The influence of metal oxide additives within alumina (¿-Al2O3) and yttria-stabilised tetragonal zirconia (Y-TZP) matrices was studied with respect to the tribological behaviour of the composites. The solid lubricants CuO, ZnO, MgO, MnO2 and B2O3 were added in sufficiently small quantities (1 or 5 wt.%) to preserve the mechanical properties of the matrix phase without increasing the specific wear rate. The additives selected were an attempt to provide the materials with a self-lubricating mechanism and therefore decrease the coefficient of dry-friction. The ceramics were prepared by means of wet-ball milling powders, compaction by isostatic pressing and densification by sintering. Near-full densities (98¿99%) were obtained for all ceramics except that containing CuO (92%). Tribological behaviour of the various composite compositions was tested on a pin-on-disk assembly using both ¿-Al2O3 and ZrO2 as counter surface. Friction reductions of almost 40% for the CuO composite was obtained while the influence of the other oxide additives were less pronounced.
Item Type:	Article
Copyright:	© 2003 Elsevier
Faculty:	Science and Technology (TNW) Engineering Technology (CTW)
Research Group:	Inorganic Membranes (IM) Design, Production and Management (DPM)
Link to this item:	http://purl.utwente.nl/publications/47718
Official URL:	http://dx.doi.org/10.1016/S0043-1648(03)00388-0
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