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Article | REF: TRI150 V1

Scratch Testing

Authors: Guillaume BERTHOUT, Nicholas X. RANDALL

Publication date: September 10, 2017, Review date: May 28, 2021

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3. Performing and interpreting the scratch test

3.1 Scratch parameters

Although the scratch test is now a commonly used tool for comparisons between different materials, it is still difficult to express the adhesion of a layer-substrate system in a quantitative way, as the appearance of a critical load depends on several parameters, some of which are linked to the test itself (intrinsic parameters) and others more related to the layer-substrate couple (extrinsic parameters).

Initial work has shown that the average pressure, P m...

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