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Noncontact excitation of sound in metals by a video pulse of electric field

  • Acoustic Methods
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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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Authors and Affiliations

  1. Zavoisky Physical-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences, Kazan, 420029, Russia

    S. A. Migachev

  2. Mikheev Institute of Physics of Metals, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620990, Russia

    M. I. Kurkin & Ya. G. Smorodinskii

Authors
  1. S. A. Migachev
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  2. M. I. Kurkin
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  3. Ya. G. Smorodinskii
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Correspondence to S. A. Migachev.

Additional information

Original Russian Text © S.A. Migachev, M.I. Kurkin, Ya.G. Smorodinskii, 2016, published in Defektoskopiya, 2016, No. 11, pp. 46–49.

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Migachev, S.A., Kurkin, M.I. & Smorodinskii, Y.G. Noncontact excitation of sound in metals by a video pulse of electric field. Russ J Nondestruct Test 52, 653–656 (2016). https://doi.org/10.1134/S1061830916110061

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  • DOI: https://doi.org/10.1134/S1061830916110061

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