Proton irradiation-induced blistering in UO2

被引：1
作者：
Pakarinen, Janne [1 ,2 ]
He, Lingfeng [2 ,3 ]
Gan, Jian [3 ]
Nelson, Andrew T. [4 ]
El-Azab, Anter [5 ]
Khafizov, Marat [6 ]
Allen, Todd R. [2 ,7 ]
机构：
[1] VTT Tech Res Ctr Finland Ltd, POB 1000, Espoo 02044, Finland
[2] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA
[3] Idaho Natl Lab, Idaho Falls, ID 83415 USA
[4] Oak Ridge Natl Lab, POB 2009, Oak Ridge, TN 37831 USA
[5] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
[6] Ohio State Univ, Dept Mech & Aerosp Engn, Columbus, OH 43210 USA
[7] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA
来源：
MRS ADVANCES | 2021年 / 6卷 / 47-48期
关键词：
THERMAL-CONDUCTIVITY; URANIUM; OXIDATION; BEHAVIOR;
D O I：
10.1557/s43580-021-00149-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 degrees 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.
引用
收藏
页码：1032 / 1036
页数：5
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