ECM - Ecole Centrale de Marseille : UMR7249 (Pôle de l'étoile
Technopole de Château-Gombert
38 rue Frédéric Joliot-Curie
13013 Marseille, France - France)
Abstract : We show three-dimensional images of phase ordering in a Fe 55 Al 45 alloy obtained by coherent x-ray diffraction Bragg ptychography. Fe-Al alloys display ordered phases where the atoms organize on sublattices resulting in the emergence of otherwise forbidden superlattice reflections. The degeneracy of the ordering results in antiphase domain boundaries that, in addition to the general lattice strain, provide phase shifts of the diffracted beam depending on the reflection. The reconstructed phase images can be separated into components originating from B2 phase domains and lattice strain by performing Bragg ptychography on both the (002) fundamental and the (001) superlattice reflections.
https://hal-amu.archives-ouvertes.fr/hal-01975963
Contributeur : Patrick Ferrand
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Soumis le : mercredi 9 janvier 2019 - 16:25:50
Dernière modification le : vendredi 11 janvier 2019 - 01:21:23
Chan Kim, Virginie Chamard, Jörg Hallmann, Thomas Roth, Wei Lu, et al.. Three-Dimensional Imaging of Phase Ordering in an Fe-Al Alloy by Bragg Ptychography. Physical Review Letters, American Physical Society, 2018, 121 (25), pp.256101. 〈10.1103/physrevlett.121.256101〉. 〈hal-01975963〉
