Synergistic effects of hydrogen plasma exposure, pulsed laser heating and temperature on rhodium surfaces

TitleSynergistic effects of hydrogen plasma exposure, pulsed laser heating and temperature on rhodium surfaces
Publication TypeJournal Article
Year of Publication2013
AuthorsL. Marot, G. De Temmerman, R.P Doerner, K. Umstadter, R.S Wagner, D. Mathys, M. Duggelin, E. Meyer
JournalJournal of Nuclear Materials
Volume432
Number1–3
Pagination388 - 394
Abstract

The combined effect of hydrogen plasma exposure and surface heating, either continuous or by short laser pulses (5 ns), on the surface morphology of rhodium layers has been studied. Investigations were performed by reflectivity measurements, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and atomic force microscope (AFM). While surfaces exposed at room temperature exhibit little modifications, strong surface changes are observed for surface temperatures higher than 250 °C. At 500 °C, the plasma exposed surface exhibits a nanoscale structure (50–100 nm) with a high level of porosity and a low reflectivity. Additional laser irradiation of the surface strongly enhances the observed surface damage. Localized surface melting is observed with craters extending deep into the substrate together with a dense network of voids.

URLhttp://www.sciencedirect.com/science/article/pii/S0022311512004229
DOI10.1016/j.jnucmat.2012.08.013
Division

PSI

Department

PSI-E

PID

23de9675d9f5cb8298bf189fec8b5577

Alternate TitleJ. Nucl. Mater.

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