Effect of Cation Doping on the Superplastic Flow in Yttria-Stabilized Tetragonal Zirconia Polycrystals

Junpei Mimurada, Manabu Nakano, Kazutaka Sasaki, Yuichi Ikuhara, Taketo Sakuma

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

The superplastic characteristics of various cation-doped yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) were examined. For 1 mol% cation doping the true stress of Y-TZP is very dependent on the ionic radii of the doped cations; for instance, smaller cation radii give rise to lower true stress when compared with the other compositions for the same grain size, strain rate, and testing temperature. The altered true stress level must be due to the change in diffusivity of the accommodation process for grain boundary sliding caused by the addition of cations in ZrO2. The strain to failure of the doped zirconia is affected by both ionic radius and valence of the dopant cations.

Original languageEnglish
Pages (from-to)1817-1821
Number of pages5
JournalJournal of the American Ceramic Society
Volume84
Issue number8
DOIs
Publication statusPublished - 2001 Aug
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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