Ultrasonic investigations in intermetallics

Pramana

Devraj Singh1¹  D K Pandey¹ 

[1] Department of Applied Physics, AMITY School of Engineering and Technology, Bijwasan, New Delhi 110 061, India$$

关键词: Intermetallics;    deviation number;    ultrasonic properties.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Ultrasonic attenuation for the longitudinal and shear waves due to phonon–phonon interaction and thermoelastic mechanism have been evaluated in B2 structured in-termetallic compounds AgMg, CuZr, AuMg, AuTi, AuMn, AuZn and AuCd along $langle 1 0 0 angle, langle 1 1 1 angle and langle 1 1 0 angle 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.

【 授权许可】

Unknown