Influence of Processing Techniques on the Surface Microstructure of V85Ni15 Membrane Alloy
| Autor: | A. A. Esin, A. A. Vostryakov, N. I. Sidorov, I. Sipatov, E. A. Pastukhov, S. A. Petrova, A. B. Shubin, A. V. Fetisov |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering Alloy Vanadium chemistry.chemical_element Polishing 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Hydrogen purifier Inorganic Chemistry X-ray photoelectron spectroscopy Materials Chemistry Surface layer Abrasive technology industry and agriculture Metals and Alloys equipment and supplies 021001 nanoscience & nanotechnology Microstructure humanities eye diseases 0104 chemical sciences chemistry Chemical engineering engineering 0210 nano-technology |
| Zdroj: | Inorganic Materials. 54:645-651 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s0020168518070178 |
| Popis: | Vanadium-based alloys with a BCC structure are considered to be an alternative to palladium alloys for hydrogen purification. Since the performance of membranes is influenced by not only their bulk characteristics but also their surface condition, we have investigated the effect of different surface preparation techniques (abrasive grinding and polishing, electrolytic polishing, and ion etching) on the surface microstructure of V85Ni15 membrane alloy using X-ray photoelectron spectroscopy. After electrolytic polishing and ion etching, we observed an increase in the percentages of vanadium and nickel metals in the surface layer of the alloy in comparison with its state after abrasive polishing. Such changes are expected to be favorable for an increase in the rate of hydrogen dissociation and recombination on the surface of the membrane material, eventually improving hydrogen transport efficiency. |
| Databáze: | OpenAIRE |
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