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

Keijiro Hiraga; Hidehiro Yoshida; Koji Morita; Byung Nam Kim

doi:10.4028/www.scientific.net/AST.62.227

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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 62Enhanced Densification and Grain-Size Refinement...

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

Abstract:

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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Advances in Science and Technology (Volume 62)

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227-231

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https://doi.org/10.4028/www.scientific.net/AST.62.227

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Online since:

October 2010

Authors:

Keijiro Hiraga, Hidehiro Yoshida, Koji Morita, Byung Nam Kim

Keywords:

Densification, Grain Growth, Segregation, Sintering, Tetragonal Zirconia

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