I did that kind of experiment two years ago. I used a SEM equipped with FIB (Focused Ion Beam) and GIS (Gas Injection System). In addition, a tensile strength testing system including LabView, Ni instruments models and a sensor was employed. Firstly, I cut a sample which has a cross section of both coating and substrate using FIB in a SEM machine. Secondly, I sticked the coating side of the sample to the sensor using GIS. Subsequently, I sticked tha substrate side to a tungsten probe which was in the SEM machine. Finally, I moved the tungsten probe slowly and slightly until the sample fractured. Usually it fractured in the interface. LabView collected the data and transferred it into force. Done.

Thank you so much for your information. Sure, I'll use your idea for my further work .