Characterization of PuO/PuCO-Type Phase and its Influence on the Oxidation Kinetics of δ-Plutonium

Autor: Ioana Popa, B. Oudot, N. Favart, Lilian Berlu, F. Delaunay, L. Jolly, Sébastien Chevalier, B. Ravat

Publikováno v: Oxidation of Metals. 96:271-281

This work focuses on PuCO-type phase formation at the surface of δ-Pu at temperatures above 300 °C under low oxygen partial pressure. Its growth was characterised by XRD and XPS and was found to follow parabolic kinetics law. This oxycarbide format

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::668867de4784fad09dc8c48f1ffe0546
https://doi.org/10.1007/s11085-021-10067-2

Oxidation of Pu alloys stabilized in δ–phase: Study of Ga alloying element behavior by using EXAFS analysis and Reverse Monte Carlo simulation

Autor: B. Ravat, N. Favart, L. Jolly, D. Menut, B. Oudot, F. Delaunay, I. Popa, S. Chevalier

Publikováno v: Corrosion Science. 218:111144

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::905f66ad34908538693e44ef298efbec
https://doi.org/10.1016/j.corsci.2023.111144

Phase transformations in PuGa 1 at.% alloy: New valuable insight into the isothermal martensitic δ→α′ transformation

Autor: B. Oudot, F. Delaunay, F. Lalire, B. Ravat, Elisabeth Aeby-Gautier, Aurélien Perron, Benoît Appolaire

Publikováno v: Acta Materialia
Acta Materialia, Elsevier, 2016, 123, pp.125-135. ⟨10.1016/j.actamat.2016.10.015⟩
Acta Materialia, Elsevier, 2016, 123, p. 125-135. 〈10.1016/j.actamat.2016.10.015〉
Acta Materialia, 2016, 123, pp.125-135. ⟨10.1016/j.actamat.2016.10.015⟩

International audience; This paper deals with the results of an investigation of low-temperature martensitic transformation in a metastable PuGa 1 at.% alloy. The kinetics of this process were studied experimentally via in situ XRD characterizations

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51563e93ad2c4456191f8f790d114f99
https://doi.org/10.1016/j.actamat.2016.10.015

The Pu–U–Am system: An ab initio informed CALPHAD thermodynamic study

Autor: F. Delaunay, Per Söderlind, Alexander Landa, B. Ravat, Patrice E. A. Turchi, B. Oudot, Aurélien Perron

Publikováno v: Journal of Nuclear Materials. 458:425-441

Phase diagram and thermodynamic properties of the Am–U system, that are experimentally unknown, are calculated using the CALPHAD method with input from ab initio electronic-structure calculations for the fcc and bcc phases. A strong tendency toward

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ffd7c682dfe9b601a9be34065b2eb9d

Thermodynamic re-assessment of the Pu–U system and its application to the ternary Pu–U–Ga system

Autor: Masaki Kurata, Alexander Landa, F. Delaunay, Aurélien Perron, B. Ravat, B. Oudot, Patrice E. A. Turchi, Per Söderlind

Publikováno v: Journal of Nuclear Materials. 454:81-95

Phase diagram and thermodynamic properties of the Plutonium–Uranium (Pu–U) system have been successfully re-assessed using the CALPHAD method with input from ab initio electronic-structure calculations for the bcc phase ( γ -U, ∊ -Pu). Results

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f5bddedaab114203c84a1fa8731bd1e
https://doi.org/10.1016/j.jnucmat.2014.07.051