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X‐ray micro Laue diffraction tomography analysis of a solid oxide fuel cell
Author(s) -
Ferreira Sanchez Dario,
Villanova Julie,
Laurencin Jérôme,
Micha JeanSébastien,
Montani Alexandre,
Gergaud Patrice,
Bleuet Pierre
Publication year - 2015
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576715002447
Subject(s) - materials science , germanium , crystallite , diffraction , solid oxide fuel cell , oxide , x ray crystallography , microbeam , monocrystalline silicon , crystallography , optics , electrode , silicon , anode , physics , chemistry , metallurgy , quantum mechanics
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.