Microstructural design for high-strain-rate superplastic oxide ceramics

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

*この研究の対応する著者

研究成果査読

20 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)191-197
ページ数7
ジャーナルJournal of the Ceramic Society of Japan
113
1315
DOI
出版ステータスPublished - 2005 3
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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