Superplastic tensile ductility in a zirconia-dispersed alumina produced by colloidal processing

T. S. Suzuki, Y. Sakka, K. Nakano, K. Hiraga

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Substantial superplasticity, where total tensile elongation to failure reaches 550 % at 1773 K, can be attained in a 10-vol%-ZrO2-dispcrsed alumina when the alumina grain size is reduced to 0.45 μm by colloidal processing. Although the same grain size is attainable by conventional dry processing, the resultant tensile elongation stays about 260%. The examination of undeformed and deformed microstructures revealed that both homogeneous particle dispersion and reduction in the size and density of residual defects in the sintered bodies arc the prerequisites for obtaining large superplastic tensile ductility in zirconia dispersed alumina.

Original languageEnglish
Pages (from-to)489-494
Number of pages6
JournalMaterials Science Forum
Volume304-306
DOIs
Publication statusPublished - 1999 Jan 1

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Keywords

  • Alumina
  • Cavitation damage
  • Colloidal processing
  • Grain growth
  • Superplasticity
  • Zirconia-dispersion

ASJC Scopus subject areas

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

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