Noncontact excitation of sound in metals by a video pulse of electric field
- Authors: Migachev S.A.1, Kurkin M.I.2, Smorodinskii Y.G.2
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Affiliations:
- Zavoisky Physical-Technical Institute, Kazan Scientific Center
- Mikheev Institute of Physics of Metals, Ural Branch
- Issue: Vol 52, No 11 (2016)
- Pages: 653-656
- Section: Acoustic Methods
- URL: https://journals.rcsi.science/1061-8309/article/view/181222
- DOI: https://doi.org/10.1134/S1061830916110061
- ID: 181222
Cite item
Abstract
An acoustic signal that is excited without acoustic contact by an excitation electrode in a metal sample has been studied. A constant electric voltage close to the breakdown value was applied between the electrode and the sample. A video pulse of electric field with a duration of 0.4 μs was used to excite sound in the sample. The ratio k of signals that were registered with noncontact and contact excitation proved surprisingly large (k = 0.14) when compared to the value expected from the literature data. A strong dependence of the noncontact acoustic signal on the filling frequency f of the excitation pulse has been observed. For f > 10 MHZ, the signal dropped to the level of noises. An explanation for this frequency dependence is proposed. It is based on the assumption of quasi-atomic thickness of the charged metal layer that is created by the electric field.
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About the authors
S. A. Migachev
Zavoisky Physical-Technical Institute, Kazan Scientific Center
Author for correspondence.
Email: smigach@kfti.knc.ru
Russian Federation, Kazan, 420029
M. I. Kurkin
Mikheev Institute of Physics of Metals, Ural Branch
Email: smigach@kfti.knc.ru
Russian Federation, Yekaterinburg, 620990
Ya. G. Smorodinskii
Mikheev Institute of Physics of Metals, Ural Branch
Email: smigach@kfti.knc.ru
Russian Federation, Yekaterinburg, 620990