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Academic literature on the topic 'Excès d'azote'
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Journal articles on the topic "Excès d'azote"
DOURMAD, Jean-Yves, Anne BOUDON, and Agnès NARCY. "Le phosphore dans les systèmes d'élevage." INRAE Productions Animales 33, no. 1 (March 12, 2020). http://dx.doi.org/10.20870/productions-animales.2020.33.1.3126.
Full textDissertations / Theses on the topic "Excès d'azote"
Nguyen, Le To Nga. "Catalyseurs à base d'or supporté sur oxydes métalliques pour la réduction des oxydes d'azote par le propène en excès d'oxygène." Paris 6, 2007. http://www.theses.fr/2007PA066713.
Full textDulaurent, Olivier. "Elimination des oxydes d'azote des gaz d'échappement en excès d'oxygène par le procédé NOx-Trap sur des catalyseurs à base de Pt-Mn-CeO2." Lyon 1, 2002. http://www.theses.fr/2002LYO10145.
Full textGinter, Caroline. "Influence des éléments d'alliage sur les mécanismes de nano-précipitation et sur les mécanismes de durcissement d'alliages modèles (Fe-Cr et Fe-Cr-C) et d'aciers industriels nitrurés." Vandoeuvre-les-Nancy, INPL, 2006. http://docnum.univ-lorraine.fr/public/INPL/2006_GINTER_C.pdf.
Full textThis work deals with high tech industries. It concerns the behavior of gas-nitrided (520°C) alloyed steels, in terms of nano-precipitation mechanisms, with incidence on hardening. Nano-precipitates characterization was performed by HRTEM and nano-probe EDX, complemented by thermodynamic phases calculations, with the help of Thermo-Calc software. The study carried out on nitrided binary (Fe-Cr) and ternary (Fe-Cr-C) alloys, allowed to propose a new explanation about nitrogen excess: nitrides (Fe,Cr)N precipitation. Chromium and initial microstructure effects on hardening were determined, and precipitation mechanisms explained. Investigations conducted on about 10 nitrided industrial steels, confirmed that chromium and aluminium are the most influent alloying elements on hardening. The 32CrMoV13 and 30CrAlMo6. 12 industrial steels characterization resulted in identifying the role of those elements and the one of initial microstructure on precipitation mechanisms, and their impact on hardening. Nitrogen excess, systematically pointed out above the surface, is related to (Fe,Cr,Al,Mo,Mn,V)N mixed nitrides and iron nitrides (in presence of Al) precipitation. It was demonstrated that nanometric platelets MN are mainly responsible for hardening. Concerning industrial application, this study led to optimize the nitrided industrial steels composition, in order to reduce thermochemical cycles, while keeping mechanical properties
Bion, Nicolas. "Réduction sélective des oxydes d'azote en excès d'oxygène sur oxydes métalliques à moyenne et haute température : Etude par couplage : spectroscopie IRTF-spectroscopie de masse et proposition de mécanisme." Caen, 2001. http://www.theses.fr/2001CAEN2045.
Full textFREYSZ, JEAN-LUC. "Reduction catalytique selective des oxydes d'azote par le propene en exces d'oxygene sur platine supporte nouvelle methode d'analyse temporelle simultanee de la surface catalytique et de la phase gaz par couplage irtf - sm." Caen, 2000. http://www.theses.fr/2000CAEN2019.
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