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Metallographic techniques for TS coatings

Abradable seal coatings require accurate metallographic treatment to ensure a realistic representation of the inherent microstructure in the resulting micrographs. High level of porosity as well as the combination of metallic, ceramic and/or synthetic material phases are prone to polishing failures due to their different properties and behaviour during the micro preparation process. Detailed mounting and polishing guidelines are essential for a consistent high micrograph quality and a comparative microstructure analysis.

Metallograpic analysis are a standard technique for the evaluation of surface coatings. Therefore the here established standardised metallographic preparation techniques are useful for any coating technology, particularly for porous and imhomogenous coating structures. They can be used for (destructive) quality control as well as process optimization or failure assessment.

Reported by

Materials Science Institute, RWTH Aachen University
Juelicher Str. 344a
52070 Aachen
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