| AVS 58th Annual International Symposium and Exhibition | |
| Advanced Surface Engineering Division | Thursday Sessions |
| Session SE-ThM |
| Session: | Nanostructured Thin Films and Coatings |
| Presenter: | Phillip Swartzentruber, University of Kentucky |
| Authors: | P. Swartzentruber, University of Kentucky T.J. Balk, University of Kentucky |
| Correspondent: | Click to Email |
Nanoporous osmium-ruthenium may be applicable as an improved coating for dispenser cathodes used in travelling wave tubes and other various vacuum tube devices. Osmium-Ruthenium (OsRu) was co-deposited with either magnesium (Mg) or scandium (Sc) as a sacrificial element to form an intermetallic thin film. The sacrificial element was then selectively etched away, which dealloyed the film and left behind a nanoporous structure. Electron microscopy, x-ray diffraction, and x-ray photoelectron spectroscopy were used to characterize the morphology, structure, and composition of the films in both the as-deposited and dealloyed states. Various film compositions and dealloying conditions were studied to determine the optimal conditions for creating a nanoporous film structure.