✦ LIBER ✦

Acoustical and elastic properties of transition metal nitrides

✍ Scribed by Rajendra Kumar Singh; Rishi Pal Singh; Manish Pratap Singh

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 311 KB
Volume: 404
Category: Article
ISSN: 0921-4526
DOI: 10.1016/j.physb.2008.10.008

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✦ Synopsis

Elastic moduli of transition metal nitrides, TiN, ZrN and HfN, have been evaluated using electrostatic and Born repulsive potentials. Acoustical dissipation due to phonon-phonon (p-p) interaction, thermoelastic mechanism and dislocation damping due to screw and edge dislocations has been evaluated in the temperature range 50-500 K along the three crystallographic directions of propagation, viz. [1 0 0], [11 0] and [111] for longitudinal and shear modes. Gru ¨neisen numbers, acoustic coupling constants and their ratios have been evaluated for the longitudinal and shear waves. Results are in good agreement with available data.

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