Proton irradiation-induced blistering in UO2

Janne Pakarinen; Lingfeng He; Jian Gan; Andrew T. Nelson; Anter El-Azab; Marat Khafizov; Todd R. Allen

doi:10.1557/s43580-021-00149-3

Proton irradiation-induced blistering in UO₂

Janne Pakarinen (Corresponding Author), Lingfeng He, Jian Gan, Andrew T. Nelson, Anter El-Azab, Marat Khafizov, Todd R. Allen

BA5507 Materials in extreme environments

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

Proton (H⁺) irradiation effects in polycrystalline UO₂ have been studied. The irradiation was carried out using three ion energies and two different ion fluxes at 600 °C. Scanning electron microscopy (SEM) investigations showed that significant surface flaking took place. Focused ion beam (FIB) milling in SEM was successfully applied for extracting lamellas from uneven blistered surfaces for transmission electron microscopy (TEM) investigations allowing detailed investigations for the degradation mechanisms. High-resolution TEM for the flaked UO₂ surfaces revealed that the implanted H⁺ formed sharp two-dimensional cavities at the peak ion-stopping region instead of diffusing to the matrix. The resulting lateral stress likely caused UO₂ surface deterioration in good agreement with previous blistering and flaking studies on crystalline materials. Graphical abstract: [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	1032-1036
Number of pages	5
Journal	MRS Advances
Volume	6
Issue number	47-48
DOIs	https://doi.org/10.1557/s43580-021-00149-3
Publication status	Published - Dec 2021
MoE publication type	A1 Journal article-refereed

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title = "Proton irradiation-induced blistering in UO2",

abstract = "Proton (H+) irradiation effects in polycrystalline UO2 have been studied. The irradiation was carried out using three ion energies and two different ion fluxes at 600 °C. Scanning electron microscopy (SEM) investigations showed that significant surface flaking took place. Focused ion beam (FIB) milling in SEM was successfully applied for extracting lamellas from uneven blistered surfaces for transmission electron microscopy (TEM) investigations allowing detailed investigations for the degradation mechanisms. High-resolution TEM for the flaked UO2 surfaces revealed that the implanted H+ formed sharp two-dimensional cavities at the peak ion-stopping region instead of diffusing to the matrix. The resulting lateral stress likely caused UO2 surface deterioration in good agreement with previous blistering and flaking studies on crystalline materials. Graphical abstract: [Figure not available: see fulltext.]",

author = "Janne Pakarinen and Lingfeng He and Jian Gan and Nelson, {Andrew T.} and Anter El-Azab and Marat Khafizov and Allen, {Todd R.}",

note = "Funding Information: JP, LH, JG, AE, and TA acknowledge the support by the Center for Materials Science of Nuclear Fuel and MK acknowledges the support by the Center for Thermal Energy Transport under Irradiation. Both are Energy Frontier Research Centers funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. The FIB and TEM work was supported by the U. S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-051D14517, as part of a Nuclear Science User Facilities experiment. Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

month = dec,

doi = "10.1557/s43580-021-00149-3",

language = "English",

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AU - Pakarinen, Janne

AU - He, Lingfeng

AU - Gan, Jian

AU - Nelson, Andrew T.

AU - El-Azab, Anter

AU - Khafizov, Marat

AU - Allen, Todd R.

N1 - Funding Information: JP, LH, JG, AE, and TA acknowledge the support by the Center for Materials Science of Nuclear Fuel and MK acknowledges the support by the Center for Thermal Energy Transport under Irradiation. Both are Energy Frontier Research Centers funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. The FIB and TEM work was supported by the U. S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-051D14517, as part of a Nuclear Science User Facilities experiment. Publisher Copyright: © 2021, The Author(s).

PY - 2021/12

Y1 - 2021/12

N2 - Proton (H+) irradiation effects in polycrystalline UO2 have been studied. The irradiation was carried out using three ion energies and two different ion fluxes at 600 °C. Scanning electron microscopy (SEM) investigations showed that significant surface flaking took place. Focused ion beam (FIB) milling in SEM was successfully applied for extracting lamellas from uneven blistered surfaces for transmission electron microscopy (TEM) investigations allowing detailed investigations for the degradation mechanisms. High-resolution TEM for the flaked UO2 surfaces revealed that the implanted H+ formed sharp two-dimensional cavities at the peak ion-stopping region instead of diffusing to the matrix. The resulting lateral stress likely caused UO2 surface deterioration in good agreement with previous blistering and flaking studies on crystalline materials. Graphical abstract: [Figure not available: see fulltext.]

AB - Proton (H+) irradiation effects in polycrystalline UO2 have been studied. The irradiation was carried out using three ion energies and two different ion fluxes at 600 °C. Scanning electron microscopy (SEM) investigations showed that significant surface flaking took place. Focused ion beam (FIB) milling in SEM was successfully applied for extracting lamellas from uneven blistered surfaces for transmission electron microscopy (TEM) investigations allowing detailed investigations for the degradation mechanisms. High-resolution TEM for the flaked UO2 surfaces revealed that the implanted H+ formed sharp two-dimensional cavities at the peak ion-stopping region instead of diffusing to the matrix. The resulting lateral stress likely caused UO2 surface deterioration in good agreement with previous blistering and flaking studies on crystalline materials. Graphical abstract: [Figure not available: see fulltext.]

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JO - MRS Advances

JF - MRS Advances

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ER -

Proton irradiation-induced blistering in UO₂

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