The effect of ceria co-doping on chemical stability and fracture toughness of Y-TZP

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Boutz, M.M.R. and Winnubst, A.J.A. and Langerak van, B. and Olde Scholtenhuis, R.J.M. and Kreuwel, K. and Burggraaf, A.J. (1995) The effect of ceria co-doping on chemical stability and fracture toughness of Y-TZP. Journal of Materials Science, 30 (7). pp. 1854-1862. ISSN 0022-2461

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Abstract:The fracture toughness and ageing resistance of yttria, ceria-stabilized tetragonal zirconia polycrystals (Y, Ce-TZP) were evaluated as a function of grain size and ceria content. Very fine grained, fully dense materials could be produced by sinter forging at relatively low temperatures (1150–1200 °C). The ageing resistance in hot water (185 °C) of 2 mol% Y2O3-stabilized TZP is strongly enhanced by alloying with ceria. The ceria content necessary to avoid degradation completely, decreases with grain size. The toughness of fully dense Y, Ce-TZP is 7–9 MPa m1/2 for grain sizes down to 0.2 mgrm. No or very little transformation took place during fracturing and no clear variation with grain size was observed for the toughness at grain sizes up to 0.8 mgrm. Reversible transformation and crack deflection may explain the observed toughness values.
Item Type:Article
Copyright:© 1995 Springer Netherlands
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/61581
Official URL:http://dx.doi.org/10.1007/BF00351622
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