Oxygen self-diffusion in near stoichiometric (U,Pu)O2 at high temperatures of 1673-1873 K
Source abstract
Abstract
Abstract The oxygen self-diffusion coefficients in near stoichiometric (U,Pu)O2 at high temperatures were successfully measured by thermogravimetry combined with the oxygen isotope exchange method. The activation energy for oxygen diffusion in the stoichiometric composition of (U,Pu)O2 was evaluated from experimental data, and the value was determined to be 248 kJ/mol. In addition, the defect migration energies of (U,Pu)O2±x were derived, and the oxygen self-diffusion coefficients were evaluated using these. As a result, good agreement was found between the experimental data and the oxygen self-diffusion coefficients calculated using the defect migration energies.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nuclear Materials and Properties · Nuclear reactor physics and engineering · Thermodynamic and Structural Properties of Metals and Alloys
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References (35)
Show source-provided references
1. Oxygen ion self-diffusion in uranium dioxide10.1016/0022-3115(61)90194-5 ↗
2. H. Edwards, A. Rosenberg, J. Bittel, Report No. ASD-TDR-63-635, Aeronautical Systems Division, Wright-Patterson Air Force Base, OH (1963).
3. Diffusion sous champ electrique de l'oxygene aux temperatures de 900° A 1 000°C dans l'oxyde d'uranium UO210.1016/0022-3115(67)90734-9 ↗
4. Oxygen and uranium diffusion in uranium dioxide (a review)10.1016/0022-3115(69)90163-9 ↗
5. Uranium and oxygen self-diffusion in UO210.1016/0022-3115(69)90164-0 ↗
6. Autodiffusion de l'oxygene dans le dioxyde d'uranium surstoechiometrique10.1016/0022-3115(72)90007-4 ↗
7. The oxygen exchange reaction of PuO210.1016/0022-1902(72)80236-7 ↗
8. Self-diffusion of oxygen in 238PuO210.1016/0022-1902(73)80579-2 ↗
9. Oxygen self-diffusion in non-stoichiometric uranium dioxide10.1080/14786437508228095 ↗
10. Self‐diffusion of oxygen in single crystal thorium oxide10.1063/1.433419 ↗
11. The mechanism of oxygen diffusion in near stoichiometric uranium dioxide10.1016/0022-3115(78)90419-1 ↗
12. Oxygen self and chemical diffusion-coefficients in UO2±x10.1016/0022-3115(78)90527-5 ↗
13. Etude de la diffusion chimique de l'oxygene dans PuO2-x par dilatometrie et thermogravimetrie10.1016/0022-3115(79)90022-9 ↗
14. Oxygen diffusion in UO2-x10.1016/0022-3115(81)90559-6 ↗
15. Mesure de l'autodiffusion de l'oxygene dans PuO2.00 par echange isotopique10.1016/0022-3115(83)90168-X ↗
16. Oxygen diffusion in relation to p-type doping in uranium dioxide10.1016/j.jnucmat.2010.02.019 ↗
17. First-principles calculation and experimental study of oxygen diffusion in uranium dioxide10.1103/PhysRevB.83.035126 ↗
18. Diffusion model of the non-stoichiometric uranium dioxide10.1016/j.jssc.2013.04.006 ↗
19. Oxygen self-diffusion in polycrystalline uranium–plutonium mixed oxide U0. 55Pu0. 45O210.1016/j.jnucmat.2015.11.003 ↗
20. Oxygen diffusion in uranium - plutonium oxide fuels at low-temperatures10.1016/0022-3115(77)90265-3 ↗
21. Oxygen chemical diffusion-coefficient of uranium-plutonium oxides10.1016/0022-3115(78)90465-8 ↗
22. Oxygen diffusion in fcc fluorite type nonstoichiometric nuclear oxides MO2±x10.1016/0167-2738(84)90130-9 ↗
23. The oxidation rate of (U0. 7Pu0. 3) O2-x with two fcc phases10.1016/j.jallcom.2007.02.062 ↗
24. Oxygen chemical diffusion in hypo-stoichiometric MOX10.1016/j.jnucmat.2009.02.018 ↗
25. Oxygen chemical diffusion coefficients of (U, Pu) O2-x10.4028/www.scientific.net/DDF.375.84 ↗
26. Oxygen diffusion model of the mixed (U, Pu) O2±x: assessment and application10.1016/j.jnucmat.2016.12.026 ↗
27. Characteristics and sinterability of MOX powder prepared by the microwave heating Denitration method10.13182/NT08-A3955 ↗
28. Crank · 1979
29. Precision of diffusion-coefficients by the isotope exchange technique10.1063/1.442088 ↗
30. Atomic transport properties in UO2 and mixed oxides (U, Pu)O2
31. Oxygen potentials, oxygen diffusion coefficients and defect equilibria of nonstoichiometric (U,Pu)O 2±x10.1016/j.jnucmat.2017.01.056 ↗
32. Diffusion characteristics of actinide oxides10.1080/18811248.1983.9733499 ↗
33. Thermodynamic assessment of oxygen diffusion in non-stoichiometric UO2±x from experimental data and Frenkel pair modeling10.1016/j.jnucmat.2012.09.011 ↗
34. Defect chemistry and basic properties of non-stoichiometric PuO210.4028/www.scientific.net/DDF.375.57 ↗
35. Defects and oxygen diffusion in PuO2-x10.1016/j.jnucmat.2005.04.044 ↗