scope:

Describes methods for determining the elastic moduli, specifically Young's modulus, shear modulus and Poisson's ratio, of advanced monolithic technical ceramics at room temperature. The prestandard prescribes four alternative methods for determining some or all of these three parameters: - A The determination of Young's modulus by static flexure of a thin beam in three- or four-point bending. - B The determination of Young's modulus by forced longitudinal resonance, or Young's modulus, shear modulus and Poisson's ratio by forced flexural and torsional resonance, of a thin beam. - C the determination of Young's modulus, shear modulus and Poisson's ratio from the time-of-flight of an ultrasonic pulse. - D The determination of Young's modulus from the fundamental natural frequency of a struck bar (impulse excitation method). All the test methods assume the use of homogeneous test pieces of linear elastic materials. With the exception of Method C, the test assumes that that the test piece has isotropic elastic properties. Method C may be used to determine the degree of anisotropy by testing in different orientations. At high porosity levels all of the methods may become inappropriate. The maximum grain size, excluding deliberately added whiskers, shall be less than 10% of the minimum dimensions of the test pieces.