ABSTRACT
For the selection of a material for some particular purpose, besides its compatibility, the mechanical properties provide decisive criteria. The different ceramics available offer a wide variety of moduli for various purposes. Most of them behave in a nearly linear elastic manner over the whole possible loading range; the high-density ones accomplish this in an ideal manner. Young's modulus and Poisson's ratio, or correlate with the elastic and strength properties of ceramic materials, example as density and porosity. Hardness is use the irreversible indentation in the material’s surface caused by variously shaped bodies under defined loads and thus describes mainly the portion of plasticity in the material. behavior. Tensile strengths are determined under uniaxial tension by rupturing plane plates or cylindrical rods which are usually tapered in the central part. The more frequently applied method to determine strengths for tensile stresses is the bending test because of the minor experimental difficulties.
