0000000000970251

AUTHOR

M. Gramond

showing 2 related works from this author

Développements récents de l'étude en temps réel par diffraction des rayons X couplée à une thermographie infrarouge : application au suivi de la réac…

1998

La formation au cours d'une reaction de combustion autoentretenue et mecaniquement activee (MASHS) d'intermetalliques nanometrique, tels que les composes FeAl et MoSi 2 , a pu etre observee in-situ et en temps reel en couplant la diffraction des rayons X, produit par rayonnement synchrotron, et une thermographie infrarouge. La mise en oeuvre d'une telle experience est indispensable en raison de la vitesse importante (10 mm/s) de propagation du front de combustion. Des developpements recents realises au niveau des systemes de detections permettent d'obtenir des temps d'acquisition tres courts (quelques dizaines de millisecondes) et de reveler des etapes intermediaires au cours de la transfor…

PhysicsInvestigation methodsGeneral Physics and AstronomyPhysical chemistryLe Journal de Physique IV
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Simultaneous IR and time-resolved X-ray diffraction measurements for studying self-sustained reactions.

1998

Self-propagating high-temperature synthesis provides an attractive practical method for producing advanced materials such as ceramics, composites and intermetallics. This kind of reaction has been investigated in situ using time-resolved X-ray diffraction, with an X-ray synchrotron beam (D43 beamline, LURE, Orsay) coupled to simultaneous IR thermography to study structural transformations and thermal evolution. With short acquisition times (30 ms per pattern) it has been possible to observe several steps before obtaining compounds. Two different compound formations have been described: (i) the different steps of reaction, aluminium melting, subsequent temperature increase and fast reaction …

DiffractionNuclear and High Energy PhysicsRadiationMaterials scienceAnalytical chemistrySelf-propagating high-temperature synthesisIntermetallicchemistry.chemical_elementFEALSynchrotronlaw.inventionCrystallographychemistryAluminiumlawPhase (matter)X-ray crystallographyInstrumentationJournal of synchrotron radiation
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