Disordering of helium gas bubble superlattices in molybdenum under ion irradiation and thermal annealing
Abstract
Self-organization of gas bubbles causes the formation of an ordered array of nanoscale gas bubbles (a gas bubble superlattice), a highly efficient mechanism for gas storage under irradiation. Here, the stability of helium (He) gas bubble superlattices in molybdenum (Mo) under krypton (Kr) ion irradiation and thermal annealing has been investigated. The He gas bubble superlattices gradually become disordered under Kr ion irradiation at 300° C, and the order-disorder transformation process completes at 2.5 dpa. Both transmission electron microscopy (TEM) and synchrotron-based small-angle X-ray scattering (SAXS) reveal that the order-disorder transformation of He gas bubble superlattices is associated with a slight increase in the average bubble size. Phase-field modeling indicates that the inhomogeneous growth and coarsening of bubbles/voids cause the disordering of imperfect superlattices under irradiation and implies that highly ordered superlattices could potentially exhibit much stronger resistance to irradiation damage. Under thermal annealing, the He gas bubble superlattices in Mo become unstable and disordered at 1000° C with the bubble size increasing from ~1.1 to ~1.6 nm. The finding in this research provides insights into the disordering mechanisms of defect superlattices as well as guidance for designing stable defect superlattices in harsh environments.
- Authors:
-
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
- Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Wisconsin, Madison, WI (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Houston, TX (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II); Idaho National Laboratory (INL), Idaho Falls, ID (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1670682
- Alternate Identifier(s):
- OSTI ID: 1698111
- Report Number(s):
- BNL-219892-2020-JAAM
Journal ID: ISSN 0022-3115; TRN: US2203871
- Grant/Contract Number:
- SC0012704; AC07-05ID14517; 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 539; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Gas bubble superlattice; Stability; Molybdenum; Irradiation; Thermal annealing
Citation Formats
Sun, Cheng, Gao, Yipeng, Sprouster, David J., Zhang, Yongfeng, Chen, Di, Wang, Yongqiang, Ecker, Lynne E., and Gan, Jian. Disordering of helium gas bubble superlattices in molybdenum under ion irradiation and thermal annealing. United States: N. p., 2020.
Web. doi:10.1016/j.jnucmat.2020.152315.
Sun, Cheng, Gao, Yipeng, Sprouster, David J., Zhang, Yongfeng, Chen, Di, Wang, Yongqiang, Ecker, Lynne E., & Gan, Jian. Disordering of helium gas bubble superlattices in molybdenum under ion irradiation and thermal annealing. United States. https://doi.org/10.1016/j.jnucmat.2020.152315
Sun, Cheng, Gao, Yipeng, Sprouster, David J., Zhang, Yongfeng, Chen, Di, Wang, Yongqiang, Ecker, Lynne E., and Gan, Jian. Wed .
"Disordering of helium gas bubble superlattices in molybdenum under ion irradiation and thermal annealing". United States. https://doi.org/10.1016/j.jnucmat.2020.152315. https://www.osti.gov/servlets/purl/1670682.
@article{osti_1670682,
title = {Disordering of helium gas bubble superlattices in molybdenum under ion irradiation and thermal annealing},
author = {Sun, Cheng and Gao, Yipeng and Sprouster, David J. and Zhang, Yongfeng and Chen, Di and Wang, Yongqiang and Ecker, Lynne E. and Gan, Jian},
abstractNote = {Self-organization of gas bubbles causes the formation of an ordered array of nanoscale gas bubbles (a gas bubble superlattice), a highly efficient mechanism for gas storage under irradiation. Here, the stability of helium (He) gas bubble superlattices in molybdenum (Mo) under krypton (Kr) ion irradiation and thermal annealing has been investigated. The He gas bubble superlattices gradually become disordered under Kr ion irradiation at 300° C, and the order-disorder transformation process completes at 2.5 dpa. Both transmission electron microscopy (TEM) and synchrotron-based small-angle X-ray scattering (SAXS) reveal that the order-disorder transformation of He gas bubble superlattices is associated with a slight increase in the average bubble size. Phase-field modeling indicates that the inhomogeneous growth and coarsening of bubbles/voids cause the disordering of imperfect superlattices under irradiation and implies that highly ordered superlattices could potentially exhibit much stronger resistance to irradiation damage. Under thermal annealing, the He gas bubble superlattices in Mo become unstable and disordered at 1000° C with the bubble size increasing from ~1.1 to ~1.6 nm. The finding in this research provides insights into the disordering mechanisms of defect superlattices as well as guidance for designing stable defect superlattices in harsh environments.},
doi = {10.1016/j.jnucmat.2020.152315},
journal = {Journal of Nuclear Materials},
number = ,
volume = 539,
place = {United States},
year = {Wed Jun 10 00:00:00 EDT 2020},
month = {Wed Jun 10 00:00:00 EDT 2020}
}
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