Elastic properties of polycrystalline aggregates

Bhagavantam, S. ; Rao, T. Seshagiri (1952) Elastic properties of polycrystalline aggregates Proceedings of the Indian Academy of Sciences, Section A, 35 (3). pp. 129-135. ISSN 0370-0089

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Official URL: http://www.ias.ac.in/j_archive/proca/35/3/129-135/...

Related URL: http://dx.doi.org/10.1007/BF03172229


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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