Titre :

Simulations of atomic deuterium exposure in self-damaged tungsten

Auteur(s) :

Hodille, E.A. [Auteur]
Institut de Recherche sur la Fusion par confinement Magnétique [IRFM]
Založnik, A. [Auteur]
Jozef Stefan Institute [Ljubljana] [IJS]
Markelj, S. [Auteur]
Jozef Stefan Institute [Ljubljana] [IJS]
Schwarz-Selinger, T. [Auteur]
Max-Planck-Institut für Plasmaphysik [Garching] [IPP]
Becquart, Charlotte [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bisson, R. [Auteur]
Physique des interactions ioniques et moléculaires [PIIM]
Grisolia, C. [Auteur]
Association EURATOM-CEA [CEA/DSM/DRFC]
Institut de Recherche sur la Fusion par confinement Magnétique [IRFM]

Titre de la revue :

Nuclear Fusion

Numéro :

57

Pagination :

56002

Date de publication :

2017-03-14

Discipline(s) HAL :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]

Résumé en anglais : [en]

International Atomic Energy Agency Nuclear Fusion Paper Simulations of atomic deuterium exposure in self-damaged tungsten E.A. Hodille1, A. Založnik2, S. Markelj2, T. Schwarz-Selinger3, C.S. Becquart4, R. Bisson5 and ...
Lire la suite >International Atomic Energy Agency Nuclear Fusion Paper Simulations of atomic deuterium exposure in self-damaged tungsten E.A. Hodille1, A. Založnik2, S. Markelj2, T. Schwarz-Selinger3, C.S. Becquart4, R. Bisson5 and C. Grisolia1 Published 14 March 2017 • © 2017 EURATOM Nuclear Fusion, Volume 57, Number 5 Citation E.A. Hodille et al 2017 Nucl. Fusion 57 056002 DOI 10.1088/1741-4326/aa5aa5 Article metrics 1269 Total downloads 4646 total citations on Dimensions. Permissions Get permission to re-use this article Share this article Article and author information Abstract Simulations of deuterium (D) atom exposure in self-damaged polycrystalline tungsten at 500 K and 600 K are performed using an evolution of the MHIMS (migration of hydrogen isotopes in materials) code in which a model to describe the interaction of D with the surface is implemented. The surface-energy barriers for both temperatures are determined analytically with a steady-state analysis. The desorption energy per D atom from the surface is 0.69  ±  0.02 eV at 500 K and 0.87  ±  0.03 eV at 600 K. These values are in good agreement with ab initio calculations as well as experimental determination of desorption energies. The absorption energy (from the surface to the bulk) is 1.33  ±  0.04 eV at 500 K, 1.55  ±  0.02 eV at 600 K when assuming that the resurfacing energy (from the bulk to the surface) is 0.2 eV. Thermal-desorption spectrometry data after D atom exposure at 500 K and isothermal desorption at 600 K after D atom exposure at 600 K can be reproduced quantitatively with three bulk-detrapping energies, namely 1.65  ±  0.01 eV, 1.85  ±  0.03 eV and 2.06  ±  0.04 eV, in addition to the intrinsic detrapping energies known for undamaged tungsten (0.85 eV and 1.00 eV). Thanks to analyses of the amount of traps during annealing at different temperatures and ab initio calculations, the 1.65 eV detrapping energy is attributed to jogged dislocations and the 1.85 eV detrapping energy is attributed to dislocation loops. Finally, the 2.06 eV detrapping energy is attributed to D trapping in cavities based on literature reporting observations on the growth of cavities, even though this could also be understood as D desorbing from the C-D bond in the case of hydrocarbon contamination in the experimental sample.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
ENSCL
CNRS
INRA

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Métallurgie Physique et Génie des Matériaux

Date de dépôt :

2019-05-16T17:19:55Z
2024-08-28T13:38:58Z