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.

+ - About the Authors Click to collapse

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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