Superplastic flow stress in cation-doped YSZ

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

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Superplastic behaviors in various cation doped yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) were examined. For 1 mol% cation-doping the flow stress of Y-TZP is very dependent on the ionic radii of the doped cations, for instance, smaller cation radii give rise to lower flow stress when comparing the various compositions for the same grain size, strain rate and testing temperature. The altered flow 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 ZrQ. Meanwhile, the strain to failure of the doped zirconia are affected by both ionic radius and valancy of the dopant cations.

Original languageEnglish
Pages (from-to)141-146
Number of pages6
JournalMaterials Science Forum
Volume357-359
DOIs
Publication statusPublished - 2001 Jan 1
Externally publishedYes
EventSuperplasticity in Advanced Materials (ICSAM-2000) - Orlando, FL, United States
Duration: 2000 Aug 12000 Aug 4

Keywords

  • Dopant
  • Ductility
  • Superplasticity
  • YSZ

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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