The influence of carbon impurities on the formation of loops in tungsten irradiated with self-ions

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The influence of carbon impurities on the formation of loops in tungsten irradiated with self-ions. / Castin, Nicolas; Dubinko, Andrii; Bonny, Giovanni; Bakaev, Alexander; Terentyev, Dmitry.

In: Journal of Nuclear Materials, Vol. 527, 151808, 15.12.2019, p. 8.

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@article{aa0ca43ab3ff41bfb1d22ac6393ecd5a,
title = "The influence of carbon impurities on the formation of loops in tungsten irradiated with self-ions",
abstract = "The microstructure changes taking place in W under irradiation are governed by many factors, amongst which C impurities and their interactions with self-interstitial atoms (SIA). In this work, we specifically study this effect by conducting a dedicated 2-MeV self-ions irradiation experiment, at room temperature. Samples were irradiated up to 0.02, 0.15 and 1.2 dpa. Transmission electron microscopy (TEM) expectedly revealed a large density of SIA loops at all these doses. Surprisingly, however, the loop number density increased in a non-monotonous manner with the received dose. Performing chemical analysis with secondary ion spectroscopy measurements (SIMS), we find that our samples were likely contaminated by C injection during the irradiation. Employing an object kinetic Monte Carlo (OKMC) model for microstructure evolution, we demonstrate that the C injection is the likely factor explaining the evolution of loops number density. Our findings highlight the importance of the well-known issue of C injection during ion irradiation experiments, and demonstrate how OKMC models can help to rationalize this effect.",
keywords = "Tungsten, ion implantation, Microstructural evolution, Object kinetic Monte Carlo, nano to macro development",
author = "Nicolas Castin and Andrii Dubinko and Giovanni Bonny and Alexander Bakaev and Dmitry Terentyev",
note = "Score=10",
year = "2019",
month = "12",
day = "15",
doi = "10.1016/j.jnucmat.2019.151808",
language = "English",
volume = "527",
pages = "8",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

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TY - JOUR

T1 - The influence of carbon impurities on the formation of loops in tungsten irradiated with self-ions

AU - Castin, Nicolas

AU - Dubinko, Andrii

AU - Bonny, Giovanni

AU - Bakaev, Alexander

AU - Terentyev, Dmitry

N1 - Score=10

PY - 2019/12/15

Y1 - 2019/12/15

N2 - The microstructure changes taking place in W under irradiation are governed by many factors, amongst which C impurities and their interactions with self-interstitial atoms (SIA). In this work, we specifically study this effect by conducting a dedicated 2-MeV self-ions irradiation experiment, at room temperature. Samples were irradiated up to 0.02, 0.15 and 1.2 dpa. Transmission electron microscopy (TEM) expectedly revealed a large density of SIA loops at all these doses. Surprisingly, however, the loop number density increased in a non-monotonous manner with the received dose. Performing chemical analysis with secondary ion spectroscopy measurements (SIMS), we find that our samples were likely contaminated by C injection during the irradiation. Employing an object kinetic Monte Carlo (OKMC) model for microstructure evolution, we demonstrate that the C injection is the likely factor explaining the evolution of loops number density. Our findings highlight the importance of the well-known issue of C injection during ion irradiation experiments, and demonstrate how OKMC models can help to rationalize this effect.

AB - The microstructure changes taking place in W under irradiation are governed by many factors, amongst which C impurities and their interactions with self-interstitial atoms (SIA). In this work, we specifically study this effect by conducting a dedicated 2-MeV self-ions irradiation experiment, at room temperature. Samples were irradiated up to 0.02, 0.15 and 1.2 dpa. Transmission electron microscopy (TEM) expectedly revealed a large density of SIA loops at all these doses. Surprisingly, however, the loop number density increased in a non-monotonous manner with the received dose. Performing chemical analysis with secondary ion spectroscopy measurements (SIMS), we find that our samples were likely contaminated by C injection during the irradiation. Employing an object kinetic Monte Carlo (OKMC) model for microstructure evolution, we demonstrate that the C injection is the likely factor explaining the evolution of loops number density. Our findings highlight the importance of the well-known issue of C injection during ion irradiation experiments, and demonstrate how OKMC models can help to rationalize this effect.

KW - Tungsten

KW - ion implantation

KW - Microstructural evolution

KW - Object kinetic Monte Carlo

KW - nano to macro development

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/35217579

U2 - 10.1016/j.jnucmat.2019.151808

DO - 10.1016/j.jnucmat.2019.151808

M3 - Article

VL - 527

SP - 8

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

M1 - 151808

ER -

ID: 5564008