Noncontact excitation of sound in metals by a video pulse of electric field
- Авторлар: Migachev S.A.1, Kurkin M.I.2, Smorodinskii Y.G.2
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Мекемелер:
- Zavoisky Physical-Technical Institute, Kazan Scientific Center
- Mikheev Institute of Physics of Metals, Ural Branch
- Шығарылым: Том 52, № 11 (2016)
- Беттер: 653-656
- Бөлім: Acoustic Methods
- URL: https://journal-vniispk.ru/1061-8309/article/view/181222
- DOI: https://doi.org/10.1134/S1061830916110061
- ID: 181222
Дәйексөз келтіру
Аннотация
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.
Негізгі сөздер
Авторлар туралы
S. Migachev
Zavoisky Physical-Technical Institute, Kazan Scientific Center
Хат алмасуға жауапты Автор.
Email: smigach@kfti.knc.ru
Ресей, Kazan, 420029
M. Kurkin
Mikheev Institute of Physics of Metals, Ural Branch
Email: smigach@kfti.knc.ru
Ресей, Yekaterinburg, 620990
Ya. Smorodinskii
Mikheev Institute of Physics of Metals, Ural Branch
Email: smigach@kfti.knc.ru
Ресей, Yekaterinburg, 620990
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