Document Type

Conference Paper


Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence


Electrical and electronic engineering

Publication Details

Proceedings of SPIE vol.IRE06, surface engineering and nanotechnology.


Thermal sprayed coatings have wide engineering applications. There now exists a wide range of destructive and nondestructive testing (NDT) methods for surface coating inspections. This paper describes an application of electronic speckle pattern shearing Interferometry (ESPI) for NDT of thermal sprayed surface coatings. In contrast to other conventional methods such as eddy current,ultrasonic or X-ray, ESPSI allows fast and large survey area inspection. Experimental results of shearographic measurements are presented. Thermal sprayed coatings were tested using ESPI. Delaminations of the coatings were detected and the fringe patterns were captured using this method. It is shown that the shearography technique can be applied successfully to surface coating qualitiy inspection and is very effective for delamination detection.

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