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Title: Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U

We present a newly developed self-consistent CALPHAD thermodynamic database involving Al, Am, Ga, Pu, and U. A first optimization of the slightly characterized Am-Al and completely unknown Am-Ga phase diagrams is proposed. To this end, phase diagram features as crystal structures, stoichiometric compounds, solubility limits, and melting temperatures have been studied along the U-Al → Pu-Al → Am-Al, and U-Ga → Pu-Ga → Am-Ga series, and the thermodynamic assessments involving Al and Ga alloying are compared. In addition, two distinct optimizations of the Pu-Al phase diagram are proposed to account for the low temperature and Pu-rich region controversy. We included the previously assessed thermodynamics of the other binary systems (Am-Pu, Am-U, Pu-U, and Al-Ga) in the database and is briefly described in the present work. In conclusion, predictions on phase stability of ternary and quaternary systems of interest are reported to check the consistency of the database.
Authors:
 [1] ;  [1] ; ORCiD logo [1] ;  [2] ;  [2] ;  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Alternative Energies and Atomic Energy Commission (CEA), Is sur Tille (France)
Publication Date:
Report Number(s):
LLNL-JRNL-695436
Journal ID: ISSN 0022-3115
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 482; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1336994
Alternate Identifier(s):
OSTI ID: 1411093

Perron, A., Turchi, P. E. A., Landa, A., Oudot, B., Ravat, B., and Delaunay, F.. Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U. United States: N. p., Web. doi:10.1016/j.jnucmat.2016.09.012.
Perron, A., Turchi, P. E. A., Landa, A., Oudot, B., Ravat, B., & Delaunay, F.. Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U. United States. doi:10.1016/j.jnucmat.2016.09.012.
Perron, A., Turchi, P. E. A., Landa, A., Oudot, B., Ravat, B., and Delaunay, F.. 2016. "Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U". United States. doi:10.1016/j.jnucmat.2016.09.012. https://www.osti.gov/servlets/purl/1336994.
@article{osti_1336994,
title = {Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U},
author = {Perron, A. and Turchi, P. E. A. and Landa, A. and Oudot, B. and Ravat, B. and Delaunay, F.},
abstractNote = {We present a newly developed self-consistent CALPHAD thermodynamic database involving Al, Am, Ga, Pu, and U. A first optimization of the slightly characterized Am-Al and completely unknown Am-Ga phase diagrams is proposed. To this end, phase diagram features as crystal structures, stoichiometric compounds, solubility limits, and melting temperatures have been studied along the U-Al → Pu-Al → Am-Al, and U-Ga → Pu-Ga → Am-Ga series, and the thermodynamic assessments involving Al and Ga alloying are compared. In addition, two distinct optimizations of the Pu-Al phase diagram are proposed to account for the low temperature and Pu-rich region controversy. We included the previously assessed thermodynamics of the other binary systems (Am-Pu, Am-U, Pu-U, and Al-Ga) in the database and is briefly described in the present work. In conclusion, predictions on phase stability of ternary and quaternary systems of interest are reported to check the consistency of the database.},
doi = {10.1016/j.jnucmat.2016.09.012},
journal = {Journal of Nuclear Materials},
number = C,
volume = 482,
place = {United States},
year = {2016},
month = {12}
}