Abstract
Abstract For the quality assessment of coatings there is an increasing need of test methods which are able to fulfil the requirements to a high reliability of the test results. The exact knowledge of the coating properties and their objective assessment helps the coating industry for an optimum coating development as well as the user which will use the coated parts under a specific purpose. As part of an European project four laboratories deal with the determination of elastic moduli of hard coatings by means of quantitative acoustic microscopy. On titanium nitride coatings and C doped chromium coatings on M2 tool steel basic and continuing research studies were accomplished, guidelines have been developed and proofed in round-robin tests.
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