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

JOURNAL OF ALLOYS AND COMPOUNDS

卷:878

Article

Evin, B.¹  Leroy, E.²  Segard, M.¹  Paul-Boncour, V²  Challet, S.¹  Fabre, A.¹  Latroche, M.² 

[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

关键词: Palladium tritide;    Nanobubble pressure;    Helium-3;    STEM-EELS;   

DOI  :  10.1016/j.jallcom.2021.160267

来源: Elsevier

【 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.

【 授权许可】

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