| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Marcos, Gregory
Université de Lorraine
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2023A new strategy to prepare alumina-zirconia composite or multilayered coatings by combining cold-spray deposition and plasma electrolytic oxidationcitations
- 2022Evidence of in-depth incorporation of carbon nanotubes in alumina layers grown by plasma electrolytic oxidationcitations
- 2021Inspection of contamination in nitrogen plasmas by monitoring the temporal evolution of the UV bands of NO-γ and of the fourth positive system of N 2citations
- 2020Improving the surface durability of patterned AISI 316LM steels by nitriding treatment for dry friction slidingcitations
- 2019Is “expanded austenite” really a solid solution? Mössbauer observation of an annealed AISI 316L nitrided samplecitations
- 2017Influence of the real dimple shape on the performance of a textured mechanical sealcitations
- 2014Microstructure modifications and associated hardness and corrosion improvements in the AISI 420 martensitic stainless steel treated by high current pulsed electron beam (HCPEB)citations
- 2011Stainless steel patterning by combination of micro-patterning and driven strain produced by plasma assisted nitridingcitations
Places of action
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article
Inspection of contamination in nitrogen plasmas by monitoring the temporal evolution of the UV bands of NO-γ and of the fourth positive system of N 2
Abstract
International audience ; In this study, contamination by oxygen species in nitrogen plasmas produced by the active screen system used for plasma nitriding (ASPN) has been investigated by optical emission spectroscopy in the spectral range of 200-900 nm. Temporal evolution of emission intensity of different species (N2, N2 + , NO, OH, H, NH and Fe) was monitored, as well as electrical characteristics (current and voltage) of the discharge produced by pulsed unipolar power supply. In nitrogen plasma, it was found that the emission of oxygen containing species (NO and OH) decrease with time, while Fe emission intensity increases. Such behavior is observed only when the discharge is initiated immediately after venting the reactor. Starting from the hypothesis of a contamination of the reactor walls by water vapour, we propose an explanation based on a synergistic effect between the temperature and the reactive nitrogen created by the plasma. Such a long decay of NO emission was not observed in N2-H2 gas mixtures. After decontamination, the fourth positive system of N2 could be observed. Such a