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Title: In-situ TEM study of the ion irradiation behavior of U3Si2 and U3Si5

Abstract

U3Si2 and U3Si5 are two important uranium silicide phases currently under extensive investigation as potential fuel forms or components for light water reactors (LWRs) to enhance accident tolerance. In this paper, their irradiation behaviors are studied by ion beam irradiations with various ion mass and energies, and their microstructure evolution is investigated by in-situ transmission electron microscopy (TEM). U3Si2 can easily be amorphized by ion beam irradiations (by 1MeV Ar2+ or Kr2+) at room temperature with the critical amorphization dose less than 1 dpa. The critical amorphization temperatures of U3Si2 irradiated by 1MeV Kr2+ and 1MeV Ar2+ ion are determined as 580±10K and 540±5K, respectively. In contrast, U3Si5 remains crystalline up to 8 dpa at room temperature and is stable against ion irradiation-induced amorphization up to ~50 dpa by either 1MeV Kr2+ or 150KeV Kr+ at 623K. These results provide valuable experimental data to guide future irradiation experiments, support the relevant post irradiation examination, and serve as the experimental basis for the validation of advanced fuel performance models


Citation Formats

Yao, Tiankai, Gong, Bowen, He, Lingfeng, Miao, Yinbin, Harp, Jason M., Tonks, Michael, and Lian, Jie. In-situ TEM study of the ion irradiation behavior of U3Si2 and U3Si5. United States: N. p., 2018. Web. doi:10.1016/j.jnucmat.2018.08.058.
Yao, Tiankai, Gong, Bowen, He, Lingfeng, Miao, Yinbin, Harp, Jason M., Tonks, Michael, & Lian, Jie. In-situ TEM study of the ion irradiation behavior of U3Si2 and U3Si5. United States. doi:10.1016/j.jnucmat.2018.08.058.
Yao, Tiankai, Gong, Bowen, He, Lingfeng, Miao, Yinbin, Harp, Jason M., Tonks, Michael, and Lian, Jie. Sat . "In-situ TEM study of the ion irradiation behavior of U3Si2 and U3Si5". United States. doi:10.1016/j.jnucmat.2018.08.058.
@article{osti_1473623,
title = {In-situ TEM study of the ion irradiation behavior of U3Si2 and U3Si5},
author = {Yao, Tiankai and Gong, Bowen and He, Lingfeng and Miao, Yinbin and Harp, Jason M. and Tonks, Michael and Lian, Jie},
abstractNote = {U3Si2 and U3Si5 are two important uranium silicide phases currently under extensive investigation as potential fuel forms or components for light water reactors (LWRs) to enhance accident tolerance. In this paper, their irradiation behaviors are studied by ion beam irradiations with various ion mass and energies, and their microstructure evolution is investigated by in-situ transmission electron microscopy (TEM). U3Si2 can easily be amorphized by ion beam irradiations (by 1MeV Ar2+ or Kr2+) at room temperature with the critical amorphization dose less than 1 dpa. The critical amorphization temperatures of U3Si2 irradiated by 1MeV Kr2+ and 1MeV Ar2+ ion are determined as 580±10K and 540±5K, respectively. In contrast, U3Si5 remains crystalline up to 8 dpa at room temperature and is stable against ion irradiation-induced amorphization up to ~50 dpa by either 1MeV Kr2+ or 150KeV Kr+ at 623K. These results provide valuable experimental data to guide future irradiation experiments, support the relevant post irradiation examination, and serve as the experimental basis for the validation of advanced fuel performance models},
doi = {10.1016/j.jnucmat.2018.08.058},
journal = {Journal of Nuclear Materials},
number = C,
volume = 511,
place = {United States},
year = {Sat Dec 01 00:00:00 EST 2018},
month = {Sat Dec 01 00:00:00 EST 2018}
}