Loop-punching suppression induced by growth of helium bubble pair in tungsten
Abstract
Molecular dynamics and transmission electron microscopy (TEM) are employed to study the formation and evolution of interstitial dislocation loops due to nearby growing helium bubbles. The study reveals a novel mechanism that suppresses further formation of loops. Mass transport of self-interstitial atoms between the bubbles is observed, followed by the loop formation, resulting in a loop- bubble complex in which the Burgers vector may rotate between <100> and 1/2<111>. Such a complex can absorb free loops, effectively influencing the evolution of loop number density. Here, these results provide new understanding of loop-bubble complex formation and saturation of the loop density under a continuous helium implantation in materials.
- Authors:
-
[2];
[2]
- Institute of Modern Physics, Lanzhou (People’s Republic of China)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1497006
- Report Number(s):
- PNNL-SA-139616
Journal ID: ISSN 0021-8979
- Grant/Contract Number:
- AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 124; Journal Issue: 23; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS
Citation Formats
Gao, N., Cui, M. H., Setyawan, W., and Kurtz, R. J. Loop-punching suppression induced by growth of helium bubble pair in tungsten. United States: N. p., 2018.
Web. doi:10.1063/1.5053138.
Gao, N., Cui, M. H., Setyawan, W., & Kurtz, R. J. Loop-punching suppression induced by growth of helium bubble pair in tungsten. United States. https://doi.org/10.1063/1.5053138
Gao, N., Cui, M. H., Setyawan, W., and Kurtz, R. J. Wed .
"Loop-punching suppression induced by growth of helium bubble pair in tungsten". United States. https://doi.org/10.1063/1.5053138. https://www.osti.gov/servlets/purl/1497006.
@article{osti_1497006,
title = {Loop-punching suppression induced by growth of helium bubble pair in tungsten},
author = {Gao, N. and Cui, M. H. and Setyawan, W. and Kurtz, R. J.},
abstractNote = {Molecular dynamics and transmission electron microscopy (TEM) are employed to study the formation and evolution of interstitial dislocation loops due to nearby growing helium bubbles. The study reveals a novel mechanism that suppresses further formation of loops. Mass transport of self-interstitial atoms between the bubbles is observed, followed by the loop formation, resulting in a loop- bubble complex in which the Burgers vector may rotate between <100> and 1/2<111>. Such a complex can absorb free loops, effectively influencing the evolution of loop number density. Here, these results provide new understanding of loop-bubble complex formation and saturation of the loop density under a continuous helium implantation in materials.},
doi = {10.1063/1.5053138},
journal = {Journal of Applied Physics},
number = 23,
volume = 124,
place = {United States},
year = {Wed Dec 19 00:00:00 EST 2018},
month = {Wed Dec 19 00:00:00 EST 2018}
}
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Works referencing / citing this record:
Atomistic simulations of helium, hydrogen, and self-interstitial diffusion inside dislocation cores in tungsten
journal, January 2020
- Mathew, Nithin; Perez, Danny; Martinez, Enrique
- Nuclear Fusion, Vol. 60, Issue 2