Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5439831 | Corrosion Science | 2017 | 13 Pages |
Abstract
We investigated the temporal degradation of glass moulding dies, made of cemented tungsten carbide coated with PtIr on an adhesive Cr or Ni interlayer, by electron microscopy and atom probe tomography. During the exposure treatments at 630 °C under an oxygen partial pressure of 1.12 Ã 10â23 bar, Cr (Ni) was found to diffuse outwards via grain boundaries in the PtIr, altering the surface morphology. Upon dissolution of the interlayer, the WC substrate also started degrading. Extensive interdiffusion processes involving PtIr, Cr (Ni) and WC took place, leading to the formation of intermetallic phases and voids, deteriorating the adhesion of the coating.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Zirong Peng, Michael Rohwerder, Pyuck-Pa Choi, Baptiste Gault, Thorsten Meiners, Marcel Friedrichs, Holger Kreilkamp, Fritz Klocke, Dierk Raabe,