title: X-ray micro Laue diffraction tomography analysis of a solid oxide fuel cell.
abstract: The relevance of micro Laue diffraction tomography (µ-LT) to investigate heterogeneous polycrystalline materials has been studied. For this purpose, a multiphase solid oxide fuel cell (SOFC) electrode composite made of yttria-stabilized zirconia and nickel oxide phases, with grains of about a few micrometres in size, has been analyzed. In order to calibrate the Laue data and to test the technique's sensitivity limits, a monocrystalline germanium sample of about 8 × 4 µm in cross-section size has also been studied through µ-LT. The SOFC and germanium Laue diffraction pattern analyses are compared and discussed. The indexing procedure has been successfully applied for the analysis of the germanium Laue data, and the depth-resolved two-dimensional cartographies of the full deviatoric strain tensor components were obtained. The development and application of an original geometrical approach to analyze the SOFC Laue data allowed the authors to resolve grains with sizes of about 3 µm and to identify their individual Laue patterns; by indexing those Laue patterns, the crystalline phases and orientations of most of the grains identified through the geometrical approach could be resolved.
authors.affiliation: Université Grenoble Alpes , Grenoble, F-38000, France ; CEA/LETI , MINATEC Campus, Grenoble, F-38054, France.
authors.forename: Dario
authors.initials: D
authors.lastname: Ferreira Sanchez
authors.affiliation: ESRF , Grenoble, France.
authors.forename: Julie
authors.initials: J
authors.lastname: Villanova
authors.affiliation: Université Grenoble Alpes , Grenoble, F-38000, France ; MINATEC Campus, CEA/Liten , 17 rue des Martyrs, Grenoble Cedex 9, 38054, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Laurencin
authors.affiliation: Université Grenoble Alpes , Grenoble, F-38000, France ; CEA/INAC and CNRS, SPrAM , 17 rue des Martyrs, Grenoble, F-38054, France.
authors.forename: Jean-Sébastien
authors.initials: JS
authors.lastname: Micha
authors.affiliation: Université Grenoble Alpes , Grenoble, F-38000, France ; MINATEC Campus, CEA/Liten , 17 rue des Martyrs, Grenoble Cedex 9, 38054, France.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Montani
authors.affiliation: Université Grenoble Alpes , Grenoble, F-38000, France ; CEA/LETI , MINATEC Campus, Grenoble, F-38054, France.
authors.forename: Patrice
authors.initials: P
authors.lastname: Gergaud
authors.affiliation: Université Grenoble Alpes , Grenoble, F-38000, France ; CEA/LETI , MINATEC Campus, Grenoble, F-38054, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Bleuet
keywords: X-ray micro Laue diffraction tomography; solid oxide fuel cells
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