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Title: Nano-crystallization induced by high-energy heavy ion irradiation in UO 2

Abstract

Here, advanced microstructure investigations of the high-burnup structure (HBS) in UO 2 produced by high-dose 84 MeV Xe ion irradiation are reported. Spark plasma sintered micro-grained UO 2 was irradiated to 1357 dpa at 350 degrees C. The characteristic nano-grains and micro-pores of the HBS were formed. The grain size and grain boundary misorientation distributions of the HBS were measured using transmission electron microscopy based orientation imaging microscopy. Grain polygonization due to accumulation of radiation-induced dislocations was found to be the mechanism of nano-crystallization. The morphology of Xe bubbles was quantitatively investigated. Finally, this study provides crucial references for advanced fuel performance modeling of high-burnup UO 2.

Authors:
 [1];  [2];  [2];  [1];  [1];  [1];  [1];  [1]
  1. Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Rensselaer Polytechnic Inst., Troy, NY (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE). Nuclear Energy Advanced Modeling and Simulation (NEAMS); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1467638
Alternate Identifier(s):
OSTI ID: 1496403
Grant/Contract Number:  
[AC02-06CH11357; NE0008564; AC07-051D14517]
Resource Type:
Accepted Manuscript
Journal Name:
Scripta Materialia
Additional Journal Information:
[ Journal Volume: 155; Journal Issue: C]; Journal ID: ISSN 1359-6462
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; High-burnup structure (HBS); Misorientation; Nanocrystalline microstructure; Orientation imaging microscopy (OIM); Scanning/transmission electronmicroscopy (STEM)

Citation Formats

Miao, Yinbin, Yao, Tiankai, Lian, Jie, Zhu, Shaofei, Bhattacharya, Sumit, Oaks, Aaron, Yacout, Abdellatif M., and Mo, Kun. Nano-crystallization induced by high-energy heavy ion irradiation in UO2. United States: N. p., 2018. Web. doi:10.1016/j.scriptamat.2018.04.006.
Miao, Yinbin, Yao, Tiankai, Lian, Jie, Zhu, Shaofei, Bhattacharya, Sumit, Oaks, Aaron, Yacout, Abdellatif M., & Mo, Kun. Nano-crystallization induced by high-energy heavy ion irradiation in UO2. United States. doi:10.1016/j.scriptamat.2018.04.006.
Miao, Yinbin, Yao, Tiankai, Lian, Jie, Zhu, Shaofei, Bhattacharya, Sumit, Oaks, Aaron, Yacout, Abdellatif M., and Mo, Kun. Thu . "Nano-crystallization induced by high-energy heavy ion irradiation in UO2". United States. doi:10.1016/j.scriptamat.2018.04.006. https://www.osti.gov/servlets/purl/1467638.
@article{osti_1467638,
title = {Nano-crystallization induced by high-energy heavy ion irradiation in UO2},
author = {Miao, Yinbin and Yao, Tiankai and Lian, Jie and Zhu, Shaofei and Bhattacharya, Sumit and Oaks, Aaron and Yacout, Abdellatif M. and Mo, Kun},
abstractNote = {Here, advanced microstructure investigations of the high-burnup structure (HBS) in UO2 produced by high-dose 84 MeV Xe ion irradiation are reported. Spark plasma sintered micro-grained UO2 was irradiated to 1357 dpa at 350 degrees C. The characteristic nano-grains and micro-pores of the HBS were formed. The grain size and grain boundary misorientation distributions of the HBS were measured using transmission electron microscopy based orientation imaging microscopy. Grain polygonization due to accumulation of radiation-induced dislocations was found to be the mechanism of nano-crystallization. The morphology of Xe bubbles was quantitatively investigated. Finally, this study provides crucial references for advanced fuel performance modeling of high-burnup UO2.},
doi = {10.1016/j.scriptamat.2018.04.006},
journal = {Scripta Materialia},
number = [C],
volume = [155],
place = {United States},
year = {2018},
month = {5}
}

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