Title: Innovative preparation route for uranium carbide using citric acid as a carbon source
Authors: SALVATO DANIELEVIGIER JEAN-FRANCOISDIESTE BLANCO OLIVERMARTEL LAURALUZZI LelioSOMERS JosephTYRPEKL VACLAV
Citation: CERAMICS INTERNATIONAL vol. 42 no. 15 p. 16710–16717
Publisher: ELSEVIER SCI LTD
Publication Year: 2016
JRC N°: JRC101767
ISSN: 0272-8842
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC101767
DOI: 10.1016/j.ceramint.2016.07.138
Type: Articles in periodicals and books
Abstract: The preparation of uranium carbide (UC) by carbothermal reduction and its sintering into dense pellets by conventional means requires high temperatures for long periods. We have developed a preparation route yielding fine UC powder with significantly increased sinterability. At first, a mixture of nanocrystalline UO2 embedded in amorphous carbon (nano-UO2/C) was obtained by thermal decomposition of a gel containing solubilised uranyl nitrate and citric acid. Later, the nano-UO2/C powder was treated in a conventional furnace or modified spark plasma sintering facility at elevated temperatures (≥1200°C) in order to obtain uranium carbide powder. The effects of initial composition, temperature, gas/vacuum atmosphere and the overall reaction kinetics are reported.
JRC Directorate:Nuclear Safety and Security

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