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Diffuse-interface modelling of multicomponent diffusion and phase separation in the U-O-Zr ternary system

Autor: M.A. Rasolofomanana, C. Cardon, M. Plapp, T. Philippe, H. Henry, R. Le Tellier

Publikováno v: Computational Materials Science
Computational Materials Science, 2022, 214, pp.111650. ⟨10.1016/j.commatsci.2022.111650⟩

International audience; The ternary mixture of uranium, zirconium and oxygen is investigated as a minimal model for corium, the mixture that forms after the meltdown of a nuclear reactor. Like corium, U-Zr-O exhibits a liquid-liquid phase separation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a3fc76a02d0b506e98996ca71cb77a6
https://cea.hal.science/cea-04017202

Corners in phase-field theory

Autor: T. Philippe

Publikováno v: Physical Review E
Physical Review E, American Physical Society (APS), 2021, 103 (3), ⟨10.1103/PhysRevE.103.032801⟩

International audience; Phase field models for strongly anisotropic surface energy need to be regularized to remove the ill-posedness of the dynamic equations. Regularization introduces a new length scale, the corner size, also called bending length.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa1f2f355a4e80b6c548bb63c97224ed
https://hal.archives-ouvertes.fr/hal-03324310/file/Corners_in_phase_field_theory_revised_version_submitted_to_PRE.pdf

Phase-field modeling of the non-congruent crystallization of a ternary Ge–Sb–Te alloy for phase-change memory applications

Autor: O. Cueto, Hervé Henry, T. Philippe, R. Bayle, Mathis Plapp, Serge Blonkowski

Publikováno v: Journal of Applied Physics
Journal of Applied Physics, American Institute of Physics, 2020, 128 (18), pp.185101. ⟨10.1063/5.0023692⟩

The ternary alloy of germanium, antimony, and tellurium (GST) is widely used as a material for phase-change memories. In particular, the stoichiometric compound Ge 2Sb 2Te 5 exhibits a rapid congruent crystallization. To increase the temperature at w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19f27551bf8b610a51aba860bdb483eb
https://hal.archives-ouvertes.fr/hal-03016048/document

A regularized phase-field model for faceting in a kinetically controlled crystal growth

Autor: Mathis Plapp, T. Philippe, Hervé Henry

Publikováno v: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Royal Society, The, 2020, 476 (2241), pp.20200227. ⟨10.1098/rspa.2020.0227⟩
Proc Math Phys Eng Sci

At equilibrium, the shape of a strongly anisotropic crystal exhibits corners when for some orientations the surface stiffness is negative. In the sharp-interface problem, the surface free energy is traditionally augmented with a curvature-dependent t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::220ee2cd8cf207e321c556e1ffd44045
https://hal.archives-ouvertes.fr/hal-03016056