Phase transformations in PuGa 1 at.% alloy: Influence of stress on  δ → α’ martensitic transformation at low temperatures

Ravat, B.; Lalire, F.; Oudot, B.; Appolaire, Benoît; Aeby‐Gautier, Elisabeth; Pansiot, J.; Delaunay, F.

doi:10.1016/j.mtla.2019.100304

Cited by 5 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the thermodynamic assessments and their applications to the Pu-U [1,37], Pu-Ga [1,[38][39][40][41], U-Ga [5,6] and Pu-U-Ga [1,42] systems are already available in the literature, the present study will only focus on the remaining systems (i.e., Pu-Fe, U-Fe, Fe-Ga, Pu-U-Fe, Pu-Fe-Ga, and U-Fe-Ga).…”

Section: Literature Reviewmentioning

confidence: 99%

Development of a CALPHAD Thermodynamic Database for Pu-U-Fe-Ga Alloys

et al. 2019

View full text Add to dashboard Cite

The interaction of actinides and actinide alloys such as the δ-stabilized Pu-Ga alloy with iron is of interest to understand the impurity effects on phase stability. A newly developed and self-consistent CALPHAD thermodynamic database is presented which covers the elements: Pu, U, Fe, Ga across their whole composition and temperature ranges. The phase diagram and thermodynamic properties of plutonium-iron (Pu-Fe) and uranium-iron (U-Fe) systems are successfully reassessed, with emphasis on the actinide rich side. Density functional theory (DFT) calculations are performed to validate the stability of the stoichiometric (Pu,U)6Fe and (Pu,U)Fe2 compounds by computing their formation enthalpies. These data are combined to construct the Pu-U-Fe ternary phase diagram. The thermodynamic assessment of Fe-Ga is presented for the first time and application to the quaternary Pu-U-Fe-Ga system is discussed.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Development of a CALPHAD Thermodynamic Database for Pu-U-Fe-Ga Alloys

et al. 2019

View full text Add to dashboard Cite

show abstract

“…XRD measurements give essential information on the lattice constants and hence on chemical composition, mechanical stresses, irradiation damage etc. and the technique is widely used on actinide-bearing materials (Gardner et al, 1965;Sari et al, 1970;Turcotte et al, 1980;Haire et al, 1984;Hecker et al, 2004;Belin et al, 2013;Prieur et al, 2014;Wheeler et al, 2015;Bykov et al, 2015;Vauchy, Belin, Richaud et al, 2016;Lalire et al, 2017;Ravat et al, 2019). However, handling radiotoxic materials is challenging as any exposure of workers to contamination and/ or irradiation can have dramatic health consequences (Cournoyer et al, 2015;Kim et al, 2016;Tang & Loganovsky, 2018).…”

Section: Introductionmentioning

confidence: 99%

New sample stage for characterizing radioactive materials by X-ray powder diffraction: application on five actinide dioxides ThO₂, UO₂, NpO₂, PuO₂ and AmO₂

et al. 2021

View full text Add to dashboard Cite

A new sample stage for characterizing radioactive materials by X-ray powder diffraction was developed at the ATALANTE facility (CEA Marcoule, France) using a conventional (non-nuclearized) Bruker D8 goniometer mounted in Bragg–Brentano geometry. The setup consists of a removable, fully hermetic sample stage, with a 200 µm-thick beryllium window, that can be plugged onto a glove-box, allowing the sample to be introduced in an hermetic medium that also encapsulates the glove-box atmosphere throughout the analysis process. The whole setup is thus hermetically unplugged from the glove-box and positioned on the centre of the goniometer. No preliminary decontamination and/or decontainment of the sample is necessary. The device was developed to avoid an expensive and time-consuming nuclearization of the diffractometer while also keeping it easily accessible for maintenance. Ultimately, keeping the diffractometer out of a glove-box also limits the volume of the final nuclear wastes, and thus the removable sample stage is the only `active' part. X-ray diffraction results of two NIST standards LaB6 and α-Al2O3 as well as five actinide dioxides ThO2, UO2, NpO2, PuO2 and AmO2 are presented to show the efficiency of the setup.

show abstract

A first-principles study on Ga stabilized δ-Pu phase stability based on structural and electronic properties

Barman,

Hernandez,

Atta-Fynn

2024

Computational Materials Science

View full text Add to dashboard Cite

Phase transformations in PuGa 1 at.% alloy: Influence of stress on δ → α’ martensitic transformation at low temperatures

Cited by 5 publications

References 39 publications

Development of a CALPHAD Thermodynamic Database for Pu-U-Fe-Ga Alloys

Development of a CALPHAD Thermodynamic Database for Pu-U-Fe-Ga Alloys

New sample stage for characterizing radioactive materials by X-ray powder diffraction: application on five actinide dioxides ThO₂, UO₂, NpO₂, PuO₂ and AmO₂

A first-principles study on Ga stabilized δ-Pu phase stability based on structural and electronic properties

Contact Info

Product

Resources

About

Phase transformations in PuGa 1 at.% alloy: Influence of stress on δ → α’ martensitic transformation at low temperatures

Cited by 5 publications

References 39 publications

Development of a CALPHAD Thermodynamic Database for Pu-U-Fe-Ga Alloys

Development of a CALPHAD Thermodynamic Database for Pu-U-Fe-Ga Alloys

New sample stage for characterizing radioactive materials by X-ray powder diffraction: application on five actinide dioxides ThO2, UO2, NpO2, PuO2 and AmO2

A first-principles study on Ga stabilized δ-Pu phase stability based on structural and electronic properties

Contact Info

Product

Resources

About

Phase transformations in PuGa 1 at.% alloy: Influence of stress on δ → α’ martensitic transformation at low temperatures

New sample stage for characterizing radioactive materials by X-ray powder diffraction: application on five actinide dioxides ThO₂, UO₂, NpO₂, PuO₂ and AmO₂