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Single‐Crystalline Elastic Constants of ZrCo2 and HfCo2 in the Temperature Range 4.2°–300°K

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2 Author(s)
Shannette, G.W. ; Institute for Atomic Research and Department of Metallurgy, Iowa State University, Ames, Iowa 50010 ; Smith, J.F.

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The elastic constants of single crystals of the cubic Laves phases ZrCo2 and HfCo2 were determined by the pulse‐echo technique over the temperature range 4.2°–300°K. Debye temperatures for the two materials were computed from extrapolations of the elastic constants to 0°K. The ratio of these Debye temperatures is such as to indicate that the primary difference between the two materials is a difference in vibrational amplitudes resulting from the mass difference between zirconium and hafnium. Further substantiation of a close similarity of interatomic force interactions in the two materials is obtained by comparison of appropriate combinations of lattice parameters and force constants.

Published in:

Journal of Applied Physics  (Volume:40 ,  Issue: 1 )