Experimental oxygen potentials for U_1−yPr_yO_2±x and thermodynamic assessment of the U-Pr-O system

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• 作者：J.W. McMurray ; ^{mcmurrayjw1@ornl.gov" class="auth_mail" title="E-mail the corresponding author} ; C.M. Silva
• 关键词：UO2± ; x ; Uranium ; Praseodymium ; Oxygen ; Compound energy formalism ; CALPHAD ; Oxygen potential ; Phase equilibria
• 刊名：Journal of Nuclear Materials
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：470
• 期：Complete
• 页码：111-118
• 全文大小：1051 K

文摘

Thermogravimetric analysis (TGA) was used to determine the oxygen potentials of fluorite urania-praseodymia (U_1−yPr_yO_2±x) solid solutions for y = 0.10 and 0.20 between 1000 and 1500 °C. A thermodynamic assessment of U-Pr-O system was performed using the CALPHAD (CALculation of PHAse Diagrams) method. The models well reproduce the TGA measurements and the computed phase relations are in good agreement with those proposed from an X-ray diffraction investigation.