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.
|Number of pages||8|
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - 2002 Nov 1|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry