Site specific dependencies of hydrogen concentrations in zirconium hydrides

SCRIPTA MATERIALIA

卷:158

Article

Tunes, Matheus A.¹  Silva, Chinthaka M.²  Edmondson, Philip D.² 

[1] Univ Huddersfield, Sch Comp & Engn, Queensgate HD1 3DH, W Yorkshire, England

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

关键词: Zirconium hydrides;    Electron Energy Loss Spectroscopy;    Transmission electron microscopy;    Jahn-Teller effect;   

DOI  :  10.1016/j.scriptamat.2018.08.044

来源: Elsevier

【 摘 要 】

Zircaloy-4 specimens were H-charged up to 1230 wppmH. Intra-, inter- and trans-granular zirconium hydride precipitates (or ZrH2-x where 1/(2 - x) is the Zr/H molar ratio) were observed throughout the alpha-Zr matrix. Transmission Electron Microscopy and electron diffraction confirmed that the ZrH(2-x )precipitates were face-centred cubic structures consistent with the delta-ZrH2- x phase. Electron Energy Loss Spectroscopy analysis of the delta-ZrH2- x precipitates at three different nucleation spots displayed shifts in the plasmon energy loss peaks that can be attributed to local variations of the H content of the delta-ZrH2- x precipitates rather than the presence of different ZrH(2- x )phases as has previously been assumed. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

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