Abstract
A number of studies for high temperature deformation and flow of polycrystalline structural ceramics have been conducted, since the pioneering works of Nabarro, Herring and Coble. However, several problems remain unsolved in the deformation and flow of ceramics materials. High temperature deformation of polycrystalline structural ceramics are usually characterized by a “viscous” liquid via Dorn equation. The aim of the present study is to establish the science and physics of deformation and flow of polycrystalline ceramics without utilizing the concept of “steady-state”.
