10.14489/td.2026.09.pp.068-076

2026, 09 September

DOI: 10.14489/td.2026.09.pp.068-076

Fedjunin D. P., Kaz'min A. I., Fedjunin P. A.
TESTING DEFECT OF MULTILAYER DIELECTRIC AND MAGNETODIELECTRIC COATINGS BY THE METHOD SURFACE ELECTROMAGNETIC WAVES
(pp. 68-76)

Abstract. Existing radio wave flaw detection methods for multilayer dielectric and magnetodielectric coatings have a low detection rate for extended defects (coating delamination from the metal substrate and interlayer delamination) and do not provide a quantitative interpretation of inspection results (assessment of the absolute magnitude of delaminations and interlayer delaminations). This article presents the results of a study on the detection and assessment of extended defects (delamination from the metal substrate and interlayer delamination) in multilayer dielectric coatings on a metal substrate by the method surface electromagnetic waves. In the proposed method, the defect parameters of multilayer coatings are estimated by minimizing a quadratic functional constructed as the residual between the experimental and calculated theoretical values of the surface electromagnetic wave field attenuation coefficients on a discrete frequency grid. Full-scale experiments on a measuring complex implementing the method showed that the method of surface electromagnetic waves provides estimates of the geometric parameters (heights) of defects in multilayer dielectric coatings in a frequency band with an error of no more than 6…10 %.

Keywords: multilayer dielectric coating, surface electromagnetic wave, delamination, interlayer delaminations, electrophysical and geometric parameters, field attenuation coef-ficient, reconstruction.

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D. P. Fedjunin, A. I. Kaz'min, P. A. Fedjunin (Military Educational and Scientific Center of the Air Force “N. E. Zhukovsky and Y. A. Gagarin Air Force Academy”, Voronezh, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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DOI: 10.14489/td.2026.09.pp.068-076

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