DOI: https://doi.org/10.30970/jps.09.227
ULTRASONIC ATTENUATION IN Ni-Pd ALLOYS AT HIGH TEMPERATURE PHASE
R. R. Yadav, A. K. Gupta, D. Singh
Physics Department, University of Allahabad,
Allahabad-211002, India
E-mail: rryadav1@rediffmail.com
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Journal of Physical Studies 9(3), 227–232 (2005)
DOI: https://doi.org/10.30970/jps.09.227 ULTRASONIC ATTENUATION IN Ni-Pd ALLOYS AT HIGH TEMPERATURE PHASER. R. Yadav, A. K. Gupta, D. Singh
Physics Department, University of Allahabad, |
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Ultrasonic attenuation coefficients are calculated due to phonon-phonon interaction and thermoelastic mechanism in Ni-Pd alloys at 100-500 K along <100> direction. Second and third order elastic constants (SOEC and TOEC), Grüneisen numbers and ultrasonic velocities are also calculated. The ultrasonic attenuation is determined utilizing these parameters. In the present investigation Ni and Pd metals are found stiffer than the Ni-Pd alloys. Behavior of ultrasonic attenuation at high temperatures reveals some disordering in the alloys.
PACS number(s): 43.35.Zc; 43.35.Cg; 43.35.Ud; 62.20.Dc