Real Time Imaging of Deuterium in a Duplex Stainless Steel Microstructure by Time-of-Flight SIMS
| Autor: | F. Straub, Wolfgang E. S. Unger, Gerald Holzlechner, Th. Boellinghaus, Oded Sobol, Th. Wirth |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Austenite
Multidisciplinary Materials science Hydrogen chemistry.chemical_element 02 engineering and technology Permeation 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Article 0104 chemical sciences Corrosion Time of flight chemistry Deuterium Ferrite (iron) Composite material 0210 nano-technology |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/srep19929 |
| Popis: | For more than one century, hydrogen assisted degradation of metallic microstructures has been identified as origin for severe technical component failures but the mechanisms behind have not yet been completely understood so far. Any in-situ observation of hydrogen transport phenomena in microstructures will provide more details for further elucidation of these degradation mechanisms. A novel experiment is presented which is designed to elucidate the permeation behaviour of deuterium in a microstructure of duplex stainless steel (DSS). A hydrogen permeation cell within a TOF-SIMS instrument enables electrochemical charging with deuterium through the inner surface of the cell made from DSS. The outer surface of the DSS permeation cell exposed to the vacuum has been imaged by TOF-SIMS vs. increasing time of charging with subsequent chemometric treatment of image data. This in-situ experiment showed evidently that deuterium is permeating much faster through the ferrite phase than through the austenite phase. Moreover, a direct proof for deuterium enrichment at the austenite-ferrite interface has been found. |
| Databáze: | OpenAIRE |
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