Effect of additives on densification and deformation of tetragonal zirconia

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Boutz, M.M.R. and Winnubst, A.J.A. and Hartgers, F. and Burggraaf, A.J. (1994) Effect of additives on densification and deformation of tetragonal zirconia. Journal of Materials Science, 29 (20). pp. 5374-5382. ISSN 0022-2461

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Abstract:The effect of additives (Bi2O3, Fe2O3) on densification and creep rates of tetragonal ZrO2-Y2O3 has been investigated. In Bi2O3-doped Y-TZP, a reactive liquid forms at temperatures above 800–900DaggerC, which leads to a strong enhancement of densification for concentrations of 1–2 mol % Bi2O3. However, during cooling from the processing temperature a strong, undesirable transformation of the tetragonal to the monoclinic phase occurs. The addition of 0.6–1.2 mol % FeO3/2 promotes densification without destabilizing the tetragonal phase. A concentration of 1.2 mol %, however, induces discontinuous grain growth, while this is not the case for 0.6 mol %. Creep rates of Y-TZP were enhanced by a factor of 4–6 by adding 0.6 mol % FeO3/2
Item Type:Article
Copyright:Springer Netherlands
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/61570
Official URL:http://dx.doi.org/10.1007/BF01171550
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