Evidence of a biphasic domain in the UO 2-Nd 2O 3 diagram at low temperature: a proof for a miscibility gap in the UO 2-Nd 2O 3 phase diagram?

Lionel Desgranges (1) , Mathieu Marcet (1) , Yves Pontillon (2) , Florence Porcher (3) , J. Lamontagne (1) , P. Matheron (1) , X. Iitis (1) , Gianguido Baldinozzi (4, 5)

1 LM2C - Laboratoire de Modélisation Multi-échelles des Combustibles
2 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)
3 LLB - UMR 12 - Laboratoire Léon Brillouin
4 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
5 LA2M - Laboratoire d'Analyse Microstructurale des Matériaux

Several samples of (U,Nd)O 2 with different Nd content (ranging from 2 to 50 in Nd 2O 3 mass. %) were prepared. For composition ranging from 6 to 20 in Nd 2O 3 mass %, two crystalline phases are unambiguously evidenced by X-ray and neutron diffraction, by optical microscopy, and by SEM EDX and EPMA. The influence of the preparation route on the distribution of the domains made by these two phases is evidenced and discussed.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Lionel Desgranges, Mathieu Marcet, Yves Pontillon, Florence Porcher, J. Lamontagne, et al.. Evidence of a biphasic domain in the UO 2-Nd 2O 3 diagram at low temperature: a proof for a miscibility gap in the UO 2-Nd 2O 3 phase diagram?. Solid State Data - Pt B: Solid State Phenomena, 2011, 172-174, pp.624-629. ⟨10.4028/www.scientific.net/SSP.172-174.624⟩. ⟨hal-00726077⟩