Ultrasonic investigations in intermetallics |
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Authors: | Devraj Singh and D K Pandey |
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Institution: | (1) Department of Applied Physics, AMITY School of Engineering and Technology, Bijwasan, New Delhi, 110 061, India |
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Abstract: | Ultrasonic attenuation for the longitudinal and shear waves due to phonon-phonon interaction and thermoelastic mechanism have
been evaluated in B2 structured intermetallic compounds AgMg, CuZr, AuMg, AuTi, AuMn, AuZn and AuCd along 〈100〉, 〈111〉 and
〈110〉 crystallographic directions at room temperature. For the same evaluations, second- and third-order elastic constants,
ultrasonic velocities, Grüneisen parameters, non-linearity parameter, Debye temperature and thermal relaxation time are also
computed. Although the molecular weight of these materials increases from AgMg to AuCd, the obtained results are affected
with the deviation number. Attenuation of ultrasonic waves due to phonon-phonon interaction is predominant over thermoelastic
loss. Results are compared with available theoretical and experimental results. The results with other well-known physical
properties are useful for industrial purposes.
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Keywords: | Intermetallics deviation number ultrasonic properties |
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