MICROWAVE METHOD FOR CONFINING HETEROGENEITIES AND METAL FERRITE COATINGS, AND FOR EVALUATING THEIR RELATIVE AMOUNT Russian patent published in 2005 - IPC

FIELD: development of nonreflecting and absorbing coatings; chemical, varnish-and-paint, and other industries.

SUBSTANCE: proposed method intended for detecting heterogeneities of electrophysical and geometric parameters in insulating and ferrite coatings on metal surfaces, and can be used to check composition and properties of solid metal coatings includes excitation of slow surface E-wave; measurement of surface E-wave field strength decay in normal plane relative to direction of its propagation at dispersed points with aid of receiving dipoles; calculation of normal decay coefficient from mathematical formula given in description of invention, this being followed by calculation of mean value of normal decay coefficient of slow surface wave field strength. Maximal deviation of decay coefficient and maximal normal decay coefficient value are found from all probable measured values and compared with threshold value. Microprocessor unit stores desired data, then scans entire surface within given variations in coating size, and array of data on all digital measurement points is used to determine heterogeneity boundaries, relative size of confined heterogeneity area being found from ratio of heterogeneity area to total area of surface being scanned.

EFFECT: enhanced precision of determining and evaluating heterogeneity of geometric and electrophysical parameters of nonconducting coatings on metal backing.

1 cl, 2 dwg