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Volume interdiffusion coefficient and uncertainty assessment for polycrystalline materials

Jacques Lechelle 1 S. Noyau 2 L. Aufore 1 A. Arredondo 1 F. Audubert 3
1 LMPC - Laboratoire d'étude des Microstructures et des Propriétés des Combustibles
SPUA - Service Plutonium Uranium et Actinides mineurs : DEN/DEC
2 SPCTS-AXE1 - Axe 1 : procédés céramiques
SPCTS - Science des Procédés Céramiques et de Traitements de Surface
3 LTEC - Laboratoire des Technologies d'Elaboration des Combustibles
SPUA - Service Plutonium Uranium et Actinides mineurs : DEN/DEC
Abstract : A method has been developed in order to assess small volume interdi ffusion coeffi cients from experimental Electron Probe MicroAnalysis concentration profi les of polycrystalline materials by means of Boltzmann-Matano or den Broeder methods and their complementary Hall method. These methods have been used as tools for the investigation of the quasi-binary UO2/U(1-y)PuyO(2-z) interdi ffusion, for which obtaining a solid solution in the bulk of grains is of major interest. In this paper uncertainties on the interdiff usion coefficient as a function of concentration have been computed for each method. Small volume coeffi cient measurements were enhanced by means of a small angle acquisition pro le line with respect to the interdiff usion interface.
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Jacques Lechelle, S. Noyau, L. Aufore, A. Arredondo, F. Audubert. Volume interdiffusion coefficient and uncertainty assessment for polycrystalline materials. Diffusion Fundamentals, Leipzig University, 2012, 17 (2), pp.1-39. ⟨cea-01064438⟩

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