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

Keijiro Hiraga, Keishi Nakano, Tohru Suzuki, Yoshio Sakka

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Superplastic tensile ductility in Al 2 O 3 -10 vol% ZrO 2 (3 mol% Y 2 O 3 ) 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 ZrO 2 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

    Fingerprint

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this