Raman imaging and principal component analysis-based data processing on uranium oxide ceramics
| Autor: | Guillaume Guimbretière, Lionel Desgranges, Mohamed-Ramzi Ammar, O. A. Maslova, Patrick Simon, Aurélien Canizares, C. Jégou |
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| Přispěvatelé: | Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Laboratoire de Caractérisation et d'étude des Propriétés des Combustibles (LCPC), Service d'Analyses, d'Elaboration, d'Expérientations et d'Examens des combustibles (SA3E), Département d'Etudes des Combustibles (DEC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Département d'Etudes des Combustibles (DEC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'Energie Atomique, Centre de Marcoule (CEA), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Uranium dioxide Analytical chemistry 02 engineering and technology рамановская спектроскопия 010402 general chemistry 01 natural sciences symbols.namesake chemistry.chemical_compound диоксид урана Local symmetry Uranium oxide General Materials Science Ceramic ComputingMilieux_MISCELLANEOUS Line (formation) Mechanical Engineering [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Mechanics of Materials Chemical physics visual_art Principal component analysis керамические материалы symbols visual_art.visual_art_medium Grain boundary 0210 nano-technology Raman spectroscopy |
| Zdroj: | Materials Characterization Materials Characterization, Elsevier, 2017, 129, pp.260-269. ⟨10.1016/j.matchar.2017.05.015⟩ Materials characterization. 2017. Vol. 129. P. 260-269 Materials Characterization, 2017, 129, pp.260-269. ⟨10.1016/j.matchar.2017.05.015⟩ |
| ISSN: | 1044-5803 |
| Popis: | A ceramic sample of uranium dioxide is probed by Raman imaging followed by a combined Lorentzian fitting – Principal Component Analysis process. This allows to evidence structural or chemical inhomogeneities of the material, which affect Raman line intensities but also line positions, evidencing local symmetry lowering. The inhomogeneities were observed not only between grain cores and boundaries, but also inside grain cores themselves. Only a part of these intensity inhomogeneities is as expected due to different orientations of the ceramic grains. Besides, a zone noticeably differing from others has been distinguished, presumably due to local strains or to chemical nature (oxygen stoichiometry), showing the sensitivity of the analysis. This underlines the importance to perform Raman analysis in such ceramic materials at least on several points and better, in imaging mode. |
| Databáze: | OpenAIRE |
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