METHOD OF DETERMINING ADHESION OF FILM TO SUBSTRATE Russian patent published in 2011 - IPC G01N19/04 

FIELD: physics.

SUBSTANCE: method of determining adhesion of a film to a substrate involves sample preparation, applying a tearing load to the coating, observing tearing of the coating and determining adhesion strength. An opening is made in the substrate through local removal of material of the substrate before coating. Change in pressure and diameter of the formed dome is observed as pressure of the working medium is applied. The change in diameter of the base of the dome as the coating is stripped off is measured and results are processed using the formula: where η_i+1 is the current adhesion stress; d_i and d_i+1 is diameter of the base of the dome during two states; p_i+1 is pressure of the working medium for diameter of the dome d_i+1. Further, adhesion strength is determined.

EFFECT: broader capabilities of the method, high accuracy of determining adhesion properties of materials and reduced spread of obtained results, avoiding damage to the film when preparing for and conducting tests.

5 cl, 2 dwg, 2 tbl