Initial stages of ion beam-induced phase transformations in Gd2O3 and Lu2O3
Abstract
The atomic-scale evolution of lanthanide sesquioxides Gd2O3 and Lu2O3 irradiated with 1 MeV Kr ions at room temperature and 120 K, up to fluences of 1x 1016 ions/cm2 (~20 dpa), has been characterized by in situ transmission electron microscopy. At room temperature, both oxides exhibited high radiation tolerance. Irradiation did not cause any observable structural change in either material, likely due to the mobility of irradiation-induced point defects, causing efficient defect annihilation. For Gd2O3, having the larger cation ionic radius of the two materials, an irradiation-induced stacking fault structure appeared at low fluences in the low temperature irradiation. As compared with the cubic-to-monoclinic phase transformations known to result from higher energy (~GeV) ion irradiation, Kr ions of lower energies (~MeV) yield much lower rates of damage accumulation and thus less extensive structural modification. Finally, at a fluence of 2.5 x 1015 ions/cm2, only the initial stages of the cubic-to-monoclinic (C to B) phase transformation process, consisting of the formation and aggregation of defects, have been observed.
- Authors:
-
- Stanford Univ., CA (United States). Dept. of Geological Sciences
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) Washington, D.C. (United States). Materials Science of Actinides (MSA)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1470351
- Alternate Identifier(s):
- OSTI ID: 1420361
- Grant/Contract Number:
- SC0001089; AC07-051D14517; AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 112; Journal Issue: 7; Related Information: MSA partners with University of Notre Dame (lead); University of California, Davis; Florida State University; George Washington University; University of Michigan; University of Minnesota; Oak Ridge National Laboratory; Oregon state University; Rensselaer Polytechnic Institute; Savannah River National Laboratory; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; nuclear (including radiation effects); materials and chemistry by design; synthesis (novel materials); synthesis (self-assembly)
Citation Formats
Chen, Chien-Hung, Tracy, Cameron L., Wang, Chenxu, Lang, Maik, and Ewing, Rodney C. Initial stages of ion beam-induced phase transformations in Gd2O3 and Lu2O3. United States: N. p., 2018.
Web. doi:10.1063/1.5013018.
Chen, Chien-Hung, Tracy, Cameron L., Wang, Chenxu, Lang, Maik, & Ewing, Rodney C. Initial stages of ion beam-induced phase transformations in Gd2O3 and Lu2O3. United States. https://doi.org/10.1063/1.5013018
Chen, Chien-Hung, Tracy, Cameron L., Wang, Chenxu, Lang, Maik, and Ewing, Rodney C. Tue .
"Initial stages of ion beam-induced phase transformations in Gd2O3 and Lu2O3". United States. https://doi.org/10.1063/1.5013018. https://www.osti.gov/servlets/purl/1470351.
@article{osti_1470351,
title = {Initial stages of ion beam-induced phase transformations in Gd2O3 and Lu2O3},
author = {Chen, Chien-Hung and Tracy, Cameron L. and Wang, Chenxu and Lang, Maik and Ewing, Rodney C.},
abstractNote = {The atomic-scale evolution of lanthanide sesquioxides Gd2O3 and Lu2O3 irradiated with 1 MeV Kr ions at room temperature and 120 K, up to fluences of 1x 1016 ions/cm2 (~20 dpa), has been characterized by in situ transmission electron microscopy. At room temperature, both oxides exhibited high radiation tolerance. Irradiation did not cause any observable structural change in either material, likely due to the mobility of irradiation-induced point defects, causing efficient defect annihilation. For Gd2O3, having the larger cation ionic radius of the two materials, an irradiation-induced stacking fault structure appeared at low fluences in the low temperature irradiation. As compared with the cubic-to-monoclinic phase transformations known to result from higher energy (~GeV) ion irradiation, Kr ions of lower energies (~MeV) yield much lower rates of damage accumulation and thus less extensive structural modification. Finally, at a fluence of 2.5 x 1015 ions/cm2, only the initial stages of the cubic-to-monoclinic (C to B) phase transformation process, consisting of the formation and aggregation of defects, have been observed.},
doi = {10.1063/1.5013018},
journal = {Applied Physics Letters},
number = 7,
volume = 112,
place = {United States},
year = {Tue Feb 13 00:00:00 EST 2018},
month = {Tue Feb 13 00:00:00 EST 2018}
}
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