Výsledky vyhledávání - "Antoine Kraych"

Non-glide effects and dislocation core fields in BCC metals

Autor: Lisa Ventelon, David Rodney, Emmanuel Clouet, Lucile Dezerald, Francois Willaime, Antoine Kraych

Publikováno v: npj Computational Materials
npj Computational Materials, Springer Nature, 2019, 5 (1), pp.109. ⟨10.1038/s41524-019-0247-3⟩
npj Computational Materials, 2019, 5 (1), pp.109. ⟨10.1038/s41524-019-0247-3⟩
npj Computational Materials, Vol 5, Iss 1, Pp 1-8 (2019)

A hallmark of low-temperature plasticity in body-centered cubic (BCC) metals is its departure from Schmid’s law. One aspect is that non-glide stresses, which do not produce any driving force on the dislocations, may affect the yield stress. We show

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5a8bbe8c02060660e11295862f29a5b
https://hal.archives-ouvertes.fr/hal-03230150

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On dislocation glide in MgSiO3 bridgmanite at high-pressure and high-temperature

Autor: Patrick Cordier, Antoine Kraych, Philippe Carrez

Publikováno v: Earth and Planetary Science Letters. 452:60-68

Dislocation glide in MgSiO3 bridgmanite with Pbnm perovskite structure is modeled at 30 and 60 GPa for the [100](010) and [010](100) slip systems. The velocity of screw dislocations is calculated in the thermally activated regime based on the kink-pa

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Atomistically-informed thermal glide model for edge dislocations in uranium dioxide

Autor: Antoine Kraych, Emmanuel Clouet, Jean-Paul Crocombette, Frédérico Garrido, Aurélien Soulié, Gaël Sattonnay

Publikováno v: Acta Materialia
Acta Materialia, Elsevier, 2018, 150, pp.248-261. ⟨10.1016/j.actamat.2018.03.024⟩
Acta Materialia, 2018, 150, pp.248-261. ⟨10.1016/j.actamat.2018.03.024⟩

International audience; We investigate the thermally activated glide mobility of dislocations in uranium dioxide (UO 2) from an atomistic point of view using a variable charge many-body empirical potential, the Second Moment Tight-Binding potential w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd403b1052c73c9b577a29ccc3b6ea09
https://hal.archives-ouvertes.fr/hal-02429515

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Pure climb creep mechanism drives flow in Earth’s lower mantle

Autor: Pierre Hirel, Karine Gouriet, Philippe Carrez, Francesca Boioli, Sebastian Ritterbex, Antoine Kraych, Patrick Cordier, Benoit Devincre

Publikováno v: Science Advances
Science Advances, American Association for the Advancement of Science (AAAS), 2017, 3 (3), ⟨10.1126/sciadv.1601958⟩
Science Advances, 2017, 3 (3), ⟨10.1126/sciadv.1601958⟩

Climb creep provides an efficient deformation mechanism for bridgmanite under lower mantle conditions.
At high pressure prevailing in the lower mantle, lattice friction opposed to dislocation glide becomes very high, as reported in recent experi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae4ef2fc12fad21dc49af2bd68cb6cbe
https://hal.archives-ouvertes.fr/hal-01637562

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Peierls potential and kink-pair mechanism in high-pressure MgSiO 3 perovskite: An atomic scale study

Autor: Emmanuel Clouet, Antoine Kraych, Philippe Carrez, Patrick Cordier, Pierre Hirel

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2016, 93 (1), ⟨10.1103/PhysRevB.93.014103⟩
Physical Review B : Condensed matter and materials physics
Physical Review B : Condensed matter and materials physics, American Physical Society, 2016, 93 (1), ⟨10.1103/PhysRevB.93.014103⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 93 (1), ⟨10.1103/PhysRevB.93.014103⟩

The motion of [100](010) screw dislocations via a kink-pair mechanism is investigated in high-pressure ${\mathrm{MgSiO}}_{3}$ perovskite by means of atomistic calculations and an elastic interaction model for kink nucleation. Atomistic calculations b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::961c5fac5c425e4776d7d786524b352b
https://hal-cea.archives-ouvertes.fr/cea-02383198

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Atomic core structure and mobility of [100](010) and [010](100) dislocations in MgSiO3 perovskite

Autor: Antoine Kraych, Philippe Carrez, Pierre Hirel, Patrick Cordier

Publikováno v: Acta Materialia
Acta Materialia, 2014, Acta Materialia, 79, pp.117-125. ⟨10.1016/j.actamat.2014.07.001⟩
Acta Materialia, Elsevier, 2014, Acta Materialia, 79, pp.117-125. ⟨10.1016/j.actamat.2014.07.001⟩

The plastic behavior of MgSiO3 perovskite is investigated under pressure conditions similar to those encountered in the Earth’s lower mantle. The core structures of dislocations with edge and screw characters are determined by means of atomic-scale

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::122074878bc21b996da096d824a5aba6
https://hal.univ-lille.fr/hal-02544916

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Phoxonic crystal sensor

Autor: Ralf Lucklum, Yan Pennec, Mikhail Zubtsov, Bahram Djafari-Rouhani, Antoine Kraych

Publikováno v: Proceedings of the SPIE-International Society for Optical Engineering, 8425
SPIE Photonics Europe, Photonic Crystal Materials and Devices X
SPIE Photonics Europe, Photonic Crystal Materials and Devices X, 2012, Brussels, Belgium. pp.84250N-1-8, ⟨10.1117/12.922553⟩

The concept of photonic and phononic crystal sensors is based on the measurement of changes in the transmission properties of the devices caused by changes of material properties of one of the materials building the crystal. It has been demonstrated

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea7684f86770bfeee13cd0cbde99471a
https://hal.science/hal-00801129

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