Experimental oxygen potentials of U1-yPryO2± x and thermodynamic assessment of the U-Pr-O system

McMurray, Jake W.; Silva, Chinthaka M.

doi:10.1016/j.jnucmat.2015.11.059

Title: Experimental oxygen potentials of U_1-yPr_yO_{2± x} and thermodynamic assessment of the U-Pr-O system

Full Record
Other Related Research

Abstract

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. Furthermore, 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.

Authors:

McMurray, Jake W. ^[1]; Silva, Chinthaka M. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Wed Dec 09 00:00:00 EST 2015

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Nuclear Energy (NE)

OSTI Identifier:: 1237148

Alternate Identifier(s):: OSTI ID: 1396641

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Nuclear Materials

Additional Journal Information:: Journal Volume: 470; Journal ID: ISSN 0022-3115

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; UO_{2± x}; uranium; praseodymium; oxygen; compound energy formalism; CALPHAD; oxygen potential; phase equilibria

Citation Formats


                    McMurray, Jake W., and Silva, Chinthaka M. Experimental oxygen potentials of U1-yPryO2± x and thermodynamic assessment of the U-Pr-O system.  United States: N. p., 2015. 
Web.  doi:10.1016/j.jnucmat.2015.11.059.

Copy to clipboard


                    McMurray, Jake W., & Silva, Chinthaka M. Experimental oxygen potentials of U1-yPryO2± x and thermodynamic assessment of the U-Pr-O system.  United States.  https://doi.org/10.1016/j.jnucmat.2015.11.059

Copy to clipboard


                    McMurray, Jake W., and Silva, Chinthaka M. Wed .  
"Experimental oxygen potentials of U1-yPryO2± x and thermodynamic assessment of the U-Pr-O system".  United States.  https://doi.org/10.1016/j.jnucmat.2015.11.059.  https://www.osti.gov/servlets/purl/1237148.

Copy to clipboard


                    
@article{osti_1237148,

  title        = {Experimental oxygen potentials of U1-yPryO2± x and thermodynamic assessment of the U-Pr-O system},

  author       = {McMurray, Jake W. and Silva, Chinthaka M.},

  abstractNote = {Thermogravimetric analysis (TGA) was used to determine the oxygen potentials of fluorite urania-praseodymia (U1-yPryO2± 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. Furthermore, 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.},

  doi          = {10.1016/j.jnucmat.2015.11.059},

  journal      = {Journal of Nuclear Materials},

  number       = ,

  volume       = 470,

  place        = {United States},

  year         = {Wed Dec 09 00:00:00 EST 2015},

  month        = {Wed Dec 09 00:00:00 EST 2015}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (Publisher)

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1016/j.jnucmat.2015.11.059

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 4 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

A combined experimental and computational thermodynamic investigation of the U-Th-O system

Journal Article McMurray, Jake Wesley ; Voit, Stewart L. ; Besmann, Theodore M. - Journal of the American Ceramic Society

Here, the thermodynamics of the U–Th–O system have been assessed using the Calphad method. The compound energy formalism (CEF) and a partially ionic two-sublattice liquid model (TSLM) were used for the fluorite U_1–yTh_yO_2±x, γ-(U,Th)₄O₉, and the U–Th–O melt. The O₂ activity of fluorite U_1–yTh_yO_2±x with temperature and composition was determined by thermogravimetric analysis. Thermodynamic studies for the Th–O binary and U–Th–O ternary available in the open literature were critically reviewed. A self-consistent data set was selected and compiled with the equilibrium oxygen pressures determined by thermogravimetry in order to optimize the adjustable parameters of models selected to represent the phasesmore » in the Th–O and U–Th–O systems.« less
Cited by 4
https://doi.org/10.1111/jace.14180

Full Text Available
Measurement of the oxygen partial pressure and thermodynamic modeling of the U-Nd-O system

Journal Article Min Lee, Seung ; Knight, Travis ; McMurray, Jake W. ; ... - Journal of Nuclear Materials

Fission products greatly impact the properties of fuel necessitating a thorough understanding of the thermochemical properties of oxide fuels with fission products. However, thermochemical data for the U-Nd-O system is insufficient even though neodymium is a major fission product. As neodymium will likely be present as a solute in UO₂, this research focuses on the study of (U_1-yNd_y)O_2-x. Experimental measurements and analyses of the oxygen partial pressure (pO(2))-temperature-oxygen to metal ratio (O/M ratio) relationships were performed using a thermogravimetric analyzer (TGA) and an oxygen analyzer. Thermodynamic computational modeling was performed using the CALPHAD (CALculation of PHAse Diagrams) method with themore »« less
https://doi.org/10.1016/j.jnucmat.2016.02.024
Oxygen trapping and cation site-splitting in Y_(2₋x)Pr_xO_3+δ (0.0≤x<2.0 and δ≤1.0)

Journal Article Lussier, Joey A. ; Devitt, Graham ; Szkop, Kevin M. ; ... - Journal of Solid State Chemistry

Here we discuss the reduction and oxidation of the solid solution Y_(2₋x)Pr_xO_3+δ (0.0≤x<2.0 and δ≤1.0) with an emphasis in our investigation on potential solid state electrolyte applications in solid oxide fuel cells. The fully reduced solid solution Y_2₋xPr_xO₃ (0.0≤x<2.0) crystallizes in the bixbyite structure (more »« less
https://doi.org/10.1016/j.jssc.2016.03.017
Phase relations and crystal chemistry of solid solution, Sr/sub y/U/sub 1-y/O/sub 2+x/

Journal Article Fujino, T ; Yamashita, T ; Tagawa, H - J. Solid State Chem.; (United States)

Solid solutions, Sr/sub y/Y/sub 1-y/O/sub 2+x/, were prepared by heating the mixtures of ..beta..-SrUO/sub 4/, UO/sub 2/, and U/sub 3/O/sub 8/ in either helium or vacuum. When heated in helium at 1300 or 1400/sup 0/C, a single-phase cubic fluorite (face centered cubic, FCC) phase was obtained up to strontium concentration (y of Sr/sub y/U/sub 1-y/O/sub 2+x/) ca. 0.3, although it splits into two fluorite phases around y = 0.03, 0.05, and 0.08 during the relatively slow cooling process. Due to larger x values of Sr/sub y/U/sub 1-y/O/sub 2+x/, for the samples heated at 1200/sup 0/C, a single rhombohedral phase wasmore »« less
https://doi.org/10.1016/0022-4596(88)90143-0
Hall effect in the mixed state of Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} detwinned single crystals

Journal Article Manson, J T ; Giapintzakis, J ; Schegolev, A I ; ... - Physical Review, B: Condensed Matter

We have measured the Hall and longitudinal resistivities of detwinned Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals with {ital x}=0.05, 0.10, 0.15, and 0.20. In the mixed state, the samples with {ital x}=0.05 and 0.10 exhibit a sign reversal of the Hall resistivity. However, the sign reversal is absent in the samples with {ital x}=0.15 and 0.20. The disappearance of the sign reversal in the {ital x}=0.15 sample represents a new finding. It indicates that the presence or absence of the sign reversal is not a thermal effect, since this sample has a {ital T}{sub {ital c}}more »« less
https://doi.org/10.1103/PhysRevB.54.10155

Similar Records

Title: Experimental oxygen potentials of U1-yPryO2± x and thermodynamic assessment of the U-Pr-O system

Abstract

Citation Formats

Title: Experimental oxygen potentials of U_1-yPr_yO_{2± x} and thermodynamic assessment of the U-Pr-O system