Title: Nano and micro U1-xThxO2 solid solutions: from powders to pellets
Authors: BALICE LUCABOUEXIERE DANIELCOLOGNA MARCOCAMBRIANI ANDREAVIGIER JEAN-FRANCOISDE BONA EMANUELESORARÙ GIAN DOMENICOKÜBEL CHRISTIANWALTER OLAFPOPA KARIN
Citation: JOURNAL OF NUCLEAR MATERIALS vol. 498 p. 307-313
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2018
JRC N°: JRC107971
ISSN: 0022-3115
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC107971
DOI: 10.1016/j.jnucmat.2017.10.042
Type: Articles in periodicals and books
Abstract: Nuclear fuels production, structural materials, separation techniques, and waste management, all may benefit from an extensive knowledge in the nano-nuclear technology. In this line, we present here the production of U1-xThxO2 (x = 0 to 1) mixed oxides nanocrystals (NC’s) through the hydrothermal decomposition of the oxalates in hot compressed water at 250 °C. Particles of spherical shape and size of about 5.5–6 nm are obtained during the hydrothermal decomposition process. The powdery nanocrystalline products were consolidated by spark plasma sintering into homogeneous mixed oxides pellets with grain sizes in the 0.4 to 5.5 μm range. Grain growth and mechanical properties were studied as a function of composition and size. No grain size effect was observed on the hardness or elastic modulus.
JRC Directorate:Nuclear Safety and Security

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