Fabrication of high-strain rate superplastic yttria-doped zirconia polycrystals by adding manganese and aluminum oxides

Yoshio Sakka, Tatsunori Ishii, Tohru S. Suzuki, Koji Morita, Keijiro Hiraga

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Conventional superplastic ceramics have been established at temperatures over 1400 °C with a slower deformation velocity of about 10-4 (s-1). For the application of superplasticity to the manufacturing process, however, high-strain rate deformation velocity of around 10-2/s-1 is necessary. We have reported that alumina addition to 3YTZ (3 mol.%Y2O3 doped ZrO2) is effective in the enhanced ductility. The purpose of this study is to fabricate high-strain rate superplastic 3YTZ by adding manganese and aluminium oxides. Dense and fine-grained 3YTZ systems were obtained by slip casting and low temperature sintering. Manganese and alminium oxides added 3YTZ showed a maximum tensile ductility of about 600% at 1450 °C at a strain rate of 1.2×10-2 s-1.

Original languageEnglish
Pages (from-to)449-453
Number of pages5
JournalJournal of the European Ceramic Society
Volume24
Issue number2
DOIs
Publication statusPublished - 2004 Feb
Externally publishedYes

Keywords

  • AlO
  • Colloidal processing
  • Grain growth
  • MnO
  • Superplasticity
  • ZrO

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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