Investigation by STEM-EELS of helium density in nanobubbles formed in aged palladium tritides

被引：11
|
作者：
Evin, B. [1 ]
Leroy, E. [2 ]
Segard, M. [1 ]
Paul-Boncour, V [2 ]
Challet, S. [1 ]
Fabre, A. [1 ]
Latroche, M. [2 ]
机构：
[1] CEA Valduc, F-21120 Is Sur Tille, France
[2] Univ Paris Est Creteil, CNRS, ICMPE UMR 7182, 2 Rue Henri Dunant, F-94320 Thiais, France
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 878卷
关键词：
Palladium tritide; Nanobubble pressure; Helium-3; STEM-EELS; HE-3; BUBBLES; PRESSURE; PD; LANI5; TEM;
D O I：
10.1016/j.jallcom.2021.160267
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
He-3 nanobubbles created by radioactive decay of tritium in palladium tritide are investigated after several years of aging. Scanning Transmission Electron Microscopy - Electron Energy-Loss Spectroscopy (STEM-EELS) has been used to measure helium density from the helium K-edge around 23 eV. Helium densities were found between 20 and 140 (+/- 30) He/nm(3) and the corresponding nanobubble pressures range between 0.1 and 3 (+/- 0.2) GPa. Measuring helium density and mapping He atoms by STEM-EELS enables to differentiate bubbles from empty cavities in the palladium tritide matrix. (C) 2021 Elsevier B.V. All rights reserved.
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页数：8
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