Analysis for angular dispersions of surface acoustic wave velocities in BCC crystals

Anmin Yin; Xiaodong Xu; Shuyi Zhang; Xuejun Yan; Minghui Lu; Yanfeng Chen

doi:10.1016/j.ultras.2021.106374

Analysis for angular dispersions of surface acoustic wave velocities in BCC crystals

Ultrasonics. 2021 May:113:106374. doi: 10.1016/j.ultras.2021.106374. Epub 2021 Jan 29.

Authors

Anmin Yin¹, Xiaodong Xu², Shuyi Zhang³, Xuejun Yan⁴, Minghui Lu⁴, Yanfeng Chen⁴

Affiliations

¹ Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, China; School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang 315211, China.
² Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, China. Electronic address: xdxu@nju.edu.cn.
³ Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, China. Electronic address: zhangsy@nju.edu.cn.
⁴ National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China.

PMID: 33561636
DOI: 10.1016/j.ultras.2021.106374

Abstract

Based on the propagation theory of acoustic waves in anisotropic media, the angular dispersion curves of SAW velocities propagated in some unusual oriented, such as (016)- and (331)-oriented, Body-Centered Cubic (BCC) single crystals are simulated using an optimized numerical method. Meanwhile, the angular dispersion curves of SAW velocities propagated in these unusual oriented BCC single crystals are measured by Impulsive Stimulated Scattering (ISS) laser ultrasonic method, which show that the measurement results are in good agreement with those of the simulations. By the optimized numerical method, the relationships between the temperature and the dispersion curves of SAW velocity propagated in these single crystals are also simulated.

Keywords: Angular dispersion; BCC crystal; Laser ultrasonics; Optimized numerical method; Surface acoustic wave.