Emma Hendry

CO-Supervisor: Dr Papken Hovespean, Materials Research Group, Sheffield Hallam University

Undergraduate project title:Velocity and impact angle effects on the erosion-corrosion of CrN/NbN PVD coatings

In studies of erosion-corrosion of multilayered PVD coatings, there has been little work carried out on the effects of velocity and impact angle on the sequential degradation rate. In this project, the combined effects of impact velocity and impact angle are being assessed on the wastage rate of a series of CrN/Nb "superlattice coatings. These PVD coatings have been developed by the Surface Coatings group in Sheffield Hallam University. Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) are being used to characterize the eroded surface. The results are being used to construct erosion-corrosion mechanistic diagrams showing the variation of erosion-corrosion mode as a function of velocity and impact angle at various applied potentials.

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