A broadband spectroscopy method for ultrasonic wave velocity measurement under high pressure.

A broadband spectroscopy method for ultrasonic wave velocity measurement under high pressure.
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高压下超声波速度测量的宽带光谱方法。

DOI:
10.1063/1.3518953
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发表时间:
2011
期刊:
The Review of scientific instruments
影响因子:
--
通讯作者:
Hongsen Xie
Hongsen Xie
中科院分区:
--
文献类型:
--
作者:
Zhigang Wang;Yonggang Liu;Wei Song;Yan Bi;Hongsen Xie

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提出了一种宽带光谱方法来测量 Z 切割石英在高达 4.7 GPa 的高压下的超声波相速度。样品处于高压静水环境中,工作中可以同时获得纵波和横波信号。通过对接收信号进行快速傅里叶变换,可以获得接收信号的频谱和相位。对接收信号进行相位展开后,即可得到超声波在样品中的传播时间,经过数据处理还可得到超声波相速度。高压下测量的弹性常数也与之前的研究进行了比较。该宽带光谱方法是获取超声波传播参数的有效方法,可应用于高压下材料的弹性研究。
A broadband spectroscopy method is proposed to measure the ultrasonic wave phase velocity of Z-cut quartz under high pressure up to 4.7 GPa. The sample is in a hydrostatic circumstance under high pressure, and we can get longitudinal wave and shear wave signals simultaneously in our work. By fast Fourier transform of received signals, the spectrum and phase of the received signals could be obtained. After unwrapping the phase of the received signals, the travel time of ultrasonic wave in the sample could be obtained, and the ultrasonic wave phase velocity could also be resolved after data processing. The elastic constant of measurement under high pressure is also compared with previous studies. This broadband spectroscopy method is a valid method to get ultrasonic wave travel parameters, and it could be applied for elasticity study of materials under high pressure.
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