Pramana | |
Acoustic wave propagation in Ni3 ð‘… (ð‘… = Mo, Nb, Ta) compounds | |
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 ð‘‰1 and ð‘‰2 have minima and maxima respectively at 45° with the unique axis of the crystal, while ð‘‰3 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
【 预 览 】
Files | Size | Format | View |
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RO201912040498258ZK.pdf | 161KB | download |