Investigation of the strain inhomogeneity in ZrO2-(Y2O3) porous ceramics under “Brazilian” test

In this paper, a study of the deformation behavior of zirconia ceramics with porosity of 27 and 42% under diametral compression tests (the Brazilian test) using the digital image correlation method was carried out. Spatiotemporal patterns of strain localization across the loading axis of the deformed sample (eyy) are obtained. It was found that the strain in porous zirconia ceramics occurs macroscopically localized. With increasing porosity, the character of formation of spatiotemporal patterns of strain localization changes. The change in the rates of averaged accumulation of local strain eyy correlates well with the type of “stress–displacement” curves.