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

*この研究の対応する著者

研究成果: Article査読

27 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)2763-2770
ページ数8
ジャーナルJournal of the American Ceramic Society
85
11
出版ステータスPublished - 2002 11 1
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 材料化学

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