X-ray micro Laue diffraction tomography analysis of a solid oxide fuel cell

Dario Ferreira Sanchez (1, 2) , Julie Villanova (3) , Jerome Laurencin (1, 4) , Jean-Sebastien Micha (5) , Alexandre Montani (1, 4) , Patrice Gergaud (1, 2) , Pierre Bleuet (1, 2)

1 UGA [2016-2019] - Université Grenoble Alpes [2016-2019]
2 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
3 ESRF - European Synchrotron Radiation Facility
4 LITEN - Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux
5 PCI - Polymères Conducteurs Ioniques

The relevance of micro Laue diffraction tomography (mu-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 x 4 mu m in cross-section size has also been studied through mu-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 mu m 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

Mots clés: X-ray micro Laue diffraction tomography; solid oxide fuel cells

Domaines: Chimie

Dario Ferreira Sanchez, Julie Villanova, Jerome Laurencin, Jean-Sebastien Micha, Alexandre Montani, et al.. X-ray micro Laue diffraction tomography analysis of a solid oxide fuel cell. Journal of Applied Crystallography, 2015, 48, pp.357-364. ⟨10.1107/S1600576715002447⟩. ⟨hal-01572797⟩