Processing-dependent microstructural factors affecting cavitation damage and tensile ductility in a superplastic alumina dispersed with zirconia

Keijiro Hiraga, Keishi Nakano, Tohru S. Suzuki, Yoshio Sakka

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Superplastic tensile ductility in Al2O3-10 vol% ZrO2 (3 mol% Y2O3) exhibits processing dependence when the grain size is reduced to 0.45 μm for a given relative density of ∼99.5%. The reduced grain size leads to largely enhanced ductility in a material prepared by colloidal processing, but does not in a material prepared by conventional dry processing. This result is explained from cavity-damage accumulation sensitive to a rather small variation in a few processing-dependent factors: the numerical densities of residual defects and ZrO2 particles. The rate of damage accumulation is shown to depend mainly on the former and additionally on the latter.

Original languageEnglish
Pages (from-to)2763-2770
Number of pages8
JournalJournal of the American Ceramic Society
Volume85
Issue number11
Publication statusPublished - 2002 Nov 1
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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