Experimental Measurements of Adherence of Thermally Sprayed Layers

Abstract

The bond strength of the thermally sprayed coatings is one of the most important features in the assessment of deposition quality. Standardized methods for determining the adhesion of thermally sprayed coatings refer to the layers deposited on flat surfaces and on the outer diameter of the cylindrical parts. Thermal spray deposition on internal cylindrical surfaces is particularly difficult for low diameter. In the case of inner cylindrical surfaces, one of the parameters that strongly influence adhesion is the diameter of the parts on which the deposit is made. The proposed method of measuring the adhesion of thermally sprayed layers offers concrete values of shear breaking force. This method can be successfully used especially for experimental samples having a small internal diamete