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|Title:||Innovative preparation route for uranium carbide using citric acid as a carbon source|
|Authors:||SALVATO DANIELE; VIGIER JEAN-FRANCOIS; DIESTE BLANCO OLIVER; MARTEL LAURA; LUZZI Lelio; SOMERS Joseph; TYRPEKL VACLAV|
|Citation:||CERAMICS INTERNATIONAL vol. 42 no. 15 p. 16710–16717|
|Publisher:||ELSEVIER SCI LTD|
|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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