Overview 14 Creep fracture in ceramic polycrystals-II. effects of inhomogeneity on creep rupture
Journal
Acta Metallurgica
Journal Volume
29
Journal Issue
12
Pages
1907-1917
Date Issued
1981
Author(s)
Abstract
Creep rupture in ceramics occurs by the nucleation, growth and coalescence of cavities in localized, inhomogeneous arrays. The cavities grow by diffusive mechanisms; a process which has previously been analyzed for uniform cavity distributions. Experimental results indicate that the inhomogeneity exerts substantial perturbations upon the failure sequence and hence, on the failure time. The failure sequence in the presence of inhomogeneity effects is examined in this paper. A model is developed that accounts for the experimentally observed damage accumulation features and predicts the influence of inhomogeneity upon the failure time. © 1981.
Type
journal article