Summary
The ultrasonic wedge method has been used for a determination of the average values (C11′)AV and (C44′)AV in the case of certain polycrystalline aggregates of cubic compounds prepared by compressing finely divided powder under high pressures. The measured values are compared with the values calculated from the known single crystal constants. It is found that certain substances can be compressed till their densities closely reach the single crystal densities and in those substances the average elastic properties also closely reach the corresponding ideal values. In other cases, the compressibility of a pressed specimen depends to a marked degree upon its density.
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Bhagavantam, S., Rao, T.S. Elastic properties of polycrystalline aggregates. Proc. Indian Acad. Sci. (Math. Sci.) 35, 129 (1952). https://doi.org/10.1007/BF03172229
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DOI: https://doi.org/10.1007/BF03172229