Rheology and porosity effect on mechanical properties of zirconia ceramics

Abstract

Porous ceramics obtained from ultra-fine powders have been studied. the porosity of ceramic samples was found between 15 to 80 %. the structure of the ceramic materials was a cellular structure. A distinctive feature of all the deformation diagrams obtained in the experiment was their nonlinearity at low deformations which was described by parabolic law. it was shown that the observed nonlinear elasticity for low deformations on deformation diagrams is due to mechanical instability of the cellular elements in the ceramic carcass.