Superplasticity in zirconia and yttria stabilized zirconia mixed powders

K. Sasaki, Y. Ikuhara, T. Sakuma

Research output: Contribution to journalArticlepeer-review

Abstract

Improved elongations were obtained for samples prepared from a novel powder of 2.5 mol % yttria stabilized zirconia when compared to the commercial powders used up to date. The novel powder consists of mixing two phases, zirconia and 6 mol % yttria stabilized zirconia particles to give an average composition of 2.5 mol % yttria. The XRD spectra revealed that unlike the commercial 2.5 mol % YSZ, the sintered samples obtained from the new powder consisted of a broader range of tetragonal phases. This implies that a wider distribution of yttria composition was present in the microstructure. Grain growth data during deformation showed that grain growth is a lot slower in samples prepared from the new powder than the commercial powder. The sluggish grain growth is caused by a non equilibrium microstructurc and hence improved tensile elongations were obtained.

Original languageEnglish
Pages (from-to)531-536
Number of pages6
JournalMaterials Science Forum
Volume304-306
DOIs
Publication statusPublished - 1999
Externally publishedYes

Keywords

  • Ceramics
  • Non-equilibrium microstructure
  • Superplasticity
  • Zirconia

ASJC Scopus subject areas

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

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