Deformation, Fracture Resistance and Heat Resistance of Elastic and Inelastic Ceramics

We illustrate the relationship between the deformation characteristics, fracture resistance, including the effects of R-curve and the R-line, and heat resistance of ceramic materials. The expediency of the classification of materials via the deformation characteristics is shown. The brittleness measure is shown to be a lucrative classification parameter. It has been found that reliable assessment of various ceramic materials within framework of thermal stability criteria should be based on the true limiting elastic deformations, rather than on the elasic limiting deformation values. The analysis of test results made it possible to determine the behavior of materials under different conditions of mechanical and thermal loading. The techniques that have been used in obtaining the experimental data are discussed. The experiments have been conducted using elastic and inelastic, oxide and non-oxide, as well as composite ceramic materials.