Acoustic wave propagation in Ni3 𝑅 (𝑅 = Mo, Nb, Ta) compounds

Pramana

Pramod Kumar Yadawa1¹ 

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

关键词: Elastic constants;    longitudinal waves;    surface waves;    ultrasonic properties.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The ultrasonic properties of the hexagonal closed packed structured Ni3Mo, Ni3Nb and Ni3Ta compounds were studied at room temperature for their characterization. For the investigations of ultrasonic properties, the second-order elastic constants using Lennard–Jones potential were computed. The velocities 𝑉1 and 𝑉2 have minima and maxima respectively at 45° with the unique axis of the crystal, while 𝑉3 increases with respect to angle with the unique axis of the crystal. The inconsistent behaviour of angle-dependent velocities is associated with the action of second-order elastic constants. Debye average sound velocities of these compounds increase with the angle and has maximum at 55° with the unique axis at room temperature. Hence, when a sound wave travels at 55° with the unique axis of these materials, the average sound velocity is found to be maximum. The results achieved are discussed and compared with the available experimental and theoretical results.

【 授权许可】

Unknown