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DOI10.1111/jace.18273
Phase stability of pre-irradiated CeO2 with swift heavy ions under high pressure up to 45 GPa
Lan, Jianxiong; Zhai, Pengfei; Nan, Shuai; Xu, Lijun; Niu, Jingjing; Tian, Cheng; Li, Zongzhen; Li, Weixing; Liu, Jie; Ewing, Rodney Charles
通讯作者Zhai, PF (通讯作者)
发表日期2022
ISSN0002-7820
EISSN1551-2916
起始页码2889
结束页码2902
卷号105期号:4
英文摘要The effect of defects on the high-pressure behavior of materials is fundamental to understanding and designing materials for extreme environments. Previous work has demonstrated that radiation damage can enhance phase stability or alter the transformation pathway. Here, we report the high-pressure phase stability of CeO2 irradiated by swift heavy ions. CeO2 is of particular interest because it can be used as a non-radioactive surrogate for UO2 and PuO2. High-pressure Raman spectroscopy shows that low-fluence ion irradiated CeO2 exhibits nearly the same high-pressure behavior as unirradiated CeO2; whereas, after high-fluence irradiation, the phase stability of CeO2 is significantly enhanced, with the critical phase transition pressure increased from 31.7 to 37.3 GPa and only about 7% high-pressure phase transition fraction at 45.1 GPa. In comparison with the high-pressure Raman results of pre-irradiated CeO2 before and after 573, 1073, and 1 273 K annealing in air, we propose that large interstitial-type defect clusters, such as dislocation loops formed in heavily-irradiated CeO2, are predominately responsible for the increased phase stability at high pressures.
关键词X-RAY-DIFFRACTIONOPTICAL-PROPERTIESDISLOCATION LOOPSRAMAN-SCATTERINGGRAIN-SIZETRACKSTRANSFORMATIONDAMAGEACCUMULATIONBEHAVIOR
英文关键词CeO2; dislocation loops; high pressure; high-temperature annealing; swift heavy ions
语种英语
WOS研究方向Materials Science
WOS类目Materials Science, Ceramics
WOS记录号WOS:000731328600001
来源期刊JOURNAL OF THE AMERICAN CERAMIC SOCIETY
来源机构中国科学院青藏高原研究所
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/260646
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GB/T 7714
Lan, Jianxiong,Zhai, Pengfei,Nan, Shuai,et al. Phase stability of pre-irradiated CeO2 with swift heavy ions under high pressure up to 45 GPa[J]. 中国科学院青藏高原研究所,2022,105(4).
APA Lan, Jianxiong.,Zhai, Pengfei.,Nan, Shuai.,Xu, Lijun.,Niu, Jingjing.,...&Ewing, Rodney Charles.(2022).Phase stability of pre-irradiated CeO2 with swift heavy ions under high pressure up to 45 GPa.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,105(4).
MLA Lan, Jianxiong,et al."Phase stability of pre-irradiated CeO2 with swift heavy ions under high pressure up to 45 GPa".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 105.4(2022).
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