Cation and Vacancy Disorder in U1-yNdyO2.00-X Alloys

Barabash, Rozaliya I.; Voit, Stewart L.; Aidhy, Dilpuneet S.; Lee, Seung Min; Knight, Travis W.; Sprouster, David J.; Ecker, Lynne E.

doi:10.1557/jmr.2015.261

Title: Cation and Vacancy Disorder in U_1-yNd_yO_2.00-X Alloys

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Abstract

In the present article, the intermixing and clustering of U/Nd, O, and vacancies were studied by both laboratory and synchrotron-based x-ray diffraction in U_1–yNd_yO_2–x alloys. It was found that an increased holding time at the high experimental temperature during initial alloy preparation results in a lower disorder of the Nd distribution in the alloys. Adjustment of the oxygen concentration in the U_1–yNd_yO_2–x alloys with different Nd concentrations was accompanied by the formation of vacancies on the oxygen sublattice and a nanocrystalline component. The lattice parameters in the U_1–yNd_yO_2–x alloys were also found to deviate significantly from Vegard's law when the Nd concentration was high (53%) and decreased with increasing oxygen concentration. Such changes indicate the formation of large vacancy concentrations during oxygen adjustment at these high temperatures. As a result, the change in the vacancy concentration after the oxygen adjustment was estimated relative to Nd concentration and oxygen stoichiometry.

Authors:

Barabash, Rozaliya I. ^[1]; Voit, Stewart L. ^[1]; Aidhy, Dilpuneet S. ^[2]; Lee, Seung Min ^[3]; Knight, Travis W. ^[3]; Sprouster, David J. ^[4]; Ecker, Lynne E. ^[4]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Wyoming, Laramie, WY (United States)
Univ. of South Carolina, Columbia, SC (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Publication Date:: Mon Sep 14 00:00:00 EDT 2015

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Nuclear Energy (NE); BNL Program Development

OSTI Identifier:: 1286836

Alternate Identifier(s):: OSTI ID: 1341513

Report Number(s):: BNL-111919-2016-JA
Journal ID: ISSN 0884-2914; AF5810000; NEAF224

Grant/Contract Number:: AC05-00OR22725; SC00112704

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Materials Research

Additional Journal Information:: Journal Volume: 30; Journal Issue: 20; Journal ID: ISSN 0884-2914

Publisher:: Materials Research Society

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; x-ray diffraction (XRD); alloy; nuclear materials; sublattice; nanocrystalline; U_1–yNd_yO_2–x alloys; Vegards Law

Citation Formats


                    Barabash, Rozaliya I., Voit, Stewart L., Aidhy, Dilpuneet S., Lee, Seung Min, Knight, Travis W., Sprouster, David J., and Ecker, Lynne E. Cation and Vacancy Disorder in U1-yNdyO2.00-X Alloys.  United States: N. p., 2015. 
Web.  doi:10.1557/jmr.2015.261.

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                    Barabash, Rozaliya I., Voit, Stewart L., Aidhy, Dilpuneet S., Lee, Seung Min, Knight, Travis W., Sprouster, David J., & Ecker, Lynne E. Cation and Vacancy Disorder in U1-yNdyO2.00-X Alloys.  United States.  https://doi.org/10.1557/jmr.2015.261

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                    Barabash, Rozaliya I., Voit, Stewart L., Aidhy, Dilpuneet S., Lee, Seung Min, Knight, Travis W., Sprouster, David J., and Ecker, Lynne E. Mon .  
"Cation and Vacancy Disorder in U1-yNdyO2.00-X Alloys".  United States.  https://doi.org/10.1557/jmr.2015.261.  https://www.osti.gov/servlets/purl/1286836.

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@article{osti_1286836,

  title        = {Cation and Vacancy Disorder in U1-yNdyO2.00-X Alloys},

  author       = {Barabash, Rozaliya I. and Voit, Stewart L. and Aidhy, Dilpuneet S. and Lee, Seung Min and Knight, Travis W. and Sprouster, David J. and Ecker, Lynne E.},

  abstractNote = {In the present article, the intermixing and clustering of U/Nd, O, and vacancies were studied by both laboratory and synchrotron-based x-ray diffraction in U1–yNdyO2–x alloys. It was found that an increased holding time at the high experimental temperature during initial alloy preparation results in a lower disorder of the Nd distribution in the alloys. Adjustment of the oxygen concentration in the U1–yNdyO2–x alloys with different Nd concentrations was accompanied by the formation of vacancies on the oxygen sublattice and a nanocrystalline component. The lattice parameters in the U1–yNdyO2–x alloys were also found to deviate significantly from Vegard's law when the Nd concentration was high (53%) and decreased with increasing oxygen concentration. Such changes indicate the formation of large vacancy concentrations during oxygen adjustment at these high temperatures. As a result, the change in the vacancy concentration after the oxygen adjustment was estimated relative to Nd concentration and oxygen stoichiometry.},

  doi          = {10.1557/jmr.2015.261},

  journal      = {Journal of Materials Research},

  number       = 20,

  volume       = 30,

  place        = {United States},

  year         = {Mon Sep 14 00:00:00 EDT 2015},

  month        = {Mon Sep 14 00:00:00 EDT 2015}

}

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Title: Cation and Vacancy Disorder in U1-yNdyO2.00-X Alloys

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Title: Cation and Vacancy Disorder in U_1-yNd_yO_2.00-X Alloys