METHOD FOR DETERMINING ADHESION STRENGTH OF COATINGS TO SUBSTRATE Russian patent published in 2017 - IPC G01N19/04 G01N27/00 

FIELD: nanotechnology.

SUBSTANCE: method includes selecting a coverage area, performing an impact on a selected area, recording the impact data, analyzing which the adhesion of coatings to substrate is judged, when selecting the coverage area, a number of coating areas is eliminated, containing together at least seven single-dimensional piezoelectric nanoscale objects, for each of the selected areas an electric field is applied in the power-microscopy mode of the piezo-response, and areas topography and images of the piezo-response are recorded in form of image, when visually analyzing which the presence of step transitions in the piezo-response images is revealed, that characterizes the separation of single one-dimensional piezoelectric nanoscale objects of selected areas into a part of nanoscale objects rigidly fixed to the substrate, and a part of nanoscale objects that are not fixed on the substrate, from the topography images of selected areas the total amount of nanoobjects on areas is determined, and by piezo-response images the number of nanoscale objects is determined on the areas, characterized with by transition, by relations (A) between the total number of detected nanosacle objects and the number of nanoscaleobjects characterized by step transition, the adhesion strength of the entire coating is judged, at A<0.3 the absence of adhesive strength is determined, at A>0.7 the maximum adhesive strength is determined. The claimed method allows by non-destructive effects on a non-continuous nanostructured coating to determine its adhesion strength.

EFFECT: determination of adhesion strength of coatings by performing non-destructive actions.

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