Enhanced Densification and Grain-Size Refinement in Cation-Doped Tetragonal Zirconia

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In tetragonal zirconia, possibility is investigated of densification with finer grain sizes under the combination of doping and sintering in air. The materials used are CIP'ed compacts of 3-mol%-yttria-stabilized tetragonal zirconia (3Y-TZP) doped with a small amount of cations. For a given sintering temperature and initial density of the compacts, while the doped cations enhances densification in the latest stage of sintering, the effect is different in grain growth during densification: a doped cation tended to enhance grain growth, whereas the other cations tended to suppress grain growth. As a result, the doping of the latter cations brings about a grain size finer than that of the undoped 3Y-TZP for a given relative density.

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Edited by:

Pietro VINCENZINI and Jean-François BAUMARD

Pages:

227-231

Citation:

K. Hiraga et al., "Enhanced Densification and Grain-Size Refinement in Cation-Doped Tetragonal Zirconia", Advances in Science and Technology, Vol. 62, pp. 227-231, 2010

Online since:

October 2010

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