Abstract
The use of PVD coatings in tribological applications becomes more and more widespread. Thus also the need to fully understand the relationships between the intrinsic properties of the coating, the properties of the coating/substrate composite and the tribological performance of the composite in different tribological systems becomes increasingly pressing. One of the tools available for tribological characterization of coatings and coating/substrate composites is scratch testing. In the current paper, Uppsala University presents a selection of results from many years of scratch testing of PVD coated components. Applications range from adhesion assessment and coating quality determination to estimation of coating fracture resistance. Examples in the form of scratch studies of PVD coatings on various high speed steels and tool steels - including failure mode anaiysis in situ SEM - are given.
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