Effect of additives on densification and deformation of tetragonal zirconia


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
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Copyright:Springer Netherlands
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/61570
Official URL:https://doi.org/10.1007/BF01171550
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