Microstructural design for high-strain-rate superplastic oxide ceramics

Keijiro Hiraga, Byung Nam Kim, Koji Morita, Tohru Suzuki, Yoshio Sakka

Research output: Contribution to journalReview article

19 Citations (Scopus)

Abstract

Factors limiting the strain rate available to superplastic deformation in oxide ceramics are discussed from existing knowledge about high-temperature plastic deformation and cavitation mechanisms. Simultaneously controlling these factors is essential for attaining high-strain-rate superplasticity (HSRS). This is shown in monolithic tetragonal zirconia and composite materials consisting of zirconia, α-alumina and a spinel phase: at strain rates higher than 10 -2 s -1 , tensile ductility reached 300-600% in the monolithic material and 600-2500% in the composite materials. Post-deformation microstructure indicates that certain secondary phases should be effective in suppressing cavitation damage and thereby enhancing HSRS.

Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalJournal of the Ceramic Society of Japan
Volume113
Issue number1315
DOIs
Publication statusPublished - 2005 Jan 1
Externally publishedYes

Fingerprint

Oxides
strain rate
Strain rate
ceramics
superplasticity
Superplasticity
oxides
cavitation flow
Cavitation
zirconium oxides
Zirconia
Superplastic deformation
composite materials
Aluminum Oxide
Composite materials
ductility
plastic deformation
spinel
Ductility
Plastic deformation

Keywords

  • Accommodation
  • Cavity growth
  • Cavity nucleation
  • Dynamic grain growth
  • Grain-boundary sliding
  • High-strain-rate superplasticity
  • Stress relaxation

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Microstructural design for high-strain-rate superplastic oxide ceramics. / Hiraga, Keijiro; Kim, Byung Nam; Morita, Koji; Suzuki, Tohru; Sakka, Yoshio.

In: Journal of the Ceramic Society of Japan, Vol. 113, No. 1315, 01.01.2005, p. 191-197.

Research output: Contribution to journalReview article

Hiraga, Keijiro ; Kim, Byung Nam ; Morita, Koji ; Suzuki, Tohru ; Sakka, Yoshio. / Microstructural design for high-strain-rate superplastic oxide ceramics. In: Journal of the Ceramic Society of Japan. 2005 ; Vol. 113, No. 1315. pp. 191-197.
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