FIELD: electrical engineering.
SUBSTANCE: method for detecting and evaluating defects in coatings of dielectric and magnetodielectric materials, used to control their quality in microelectronic, chemical, paint and varnish and other industries, as well as in the development and operation of radio absorbing materials and coatings. When coating delamination is detected by the threshold value of the attenuation coefficient of the reference sample coating and calculating its value in the coating under study, additionally excite E-type surface electromagnetic waves sequentially at K-frequencies and measure the experimental value of the complex attenuation coefficient for each surface wave, while setting the range of possible values of the coating delamination height in relation to the parameters of the reference sample of the coating, after which the residual functional (discrepancy of values) is composed, according to which a decision is made about the presence of a coating or delamination of the coating from the metal substrate, while the measured value of the height of the detected delamination is taken as the value obtained by minimizing the residual functional.
EFFECT: increasing the probability of detecting defects in dielectric and magnetodielectric coatings with frequency dispersion of electrophysical parameters, as well as increasing the accuracy and reliability of estimating the values of their heights relative to the metal substrate.
1 cl, 5 dwg
