Site specific dependencies of hydrogen concentrations in zirconium hydrides

Matheus A. Tunes; Chinthaka M. Silva; Philip D. Edmondson

doi:10.1016/j.scriptamat.2018.08.044

Site specific dependencies of hydrogen concentrations in zirconium hydrides

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

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

7 Citations (Scopus)

Abstract

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 α-Zr matrix. Transmission Electron Microscopy and electron diffraction confirmed that the ZrH2−x precipitates were face-centred cubic structures consistent with the δ-ZrH2−x phase. Electron Energy Loss Spectroscopy analysis of the δ-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 δ-ZrH2−x precipitates rather than the presence of different ZrH2−x phases as has previously been assumed.

Original language	English
Pages (from-to)	136-140
Number of pages	5
Journal	Scripta Materialia
Volume	158.2019
Issue number	1 January
Early online date	5 Sept 2018
DOIs	https://doi.org/10.1016/j.scriptamat.2018.08.044 https://doi.org/10.1016/j.scriptamat.2018.08.044
Publication status	Published - 2019
Externally published	Yes

Keywords

Electron Energy Loss Spectroscopy
Jahn-Teller effect
Transmission electron microscopy
Zirconium hydrides

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title = "Site specific dependencies of hydrogen concentrations in zirconium hydrides",

abstract = "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 α-Zr matrix. Transmission Electron Microscopy and electron diffraction confirmed that the ZrH2−x precipitates were face-centred cubic structures consistent with the δ-ZrH2−x phase. Electron Energy Loss Spectroscopy analysis of the δ-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 δ-ZrH2−x precipitates rather than the presence of different ZrH2−x phases as has previously been assumed.",

keywords = "Electron Energy Loss Spectroscopy, Jahn-Teller effect, Transmission electron microscopy, Zirconium hydrides",

author = "Tunes, {Matheus A.} and Silva, {Chinthaka M.} and Edmondson, {Philip D.}",

year = "2019",

doi = "10.1016/j.scriptamat.2018.08.044",

language = "English",

volume = "158.2019",

pages = "136--140",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

number = "1 January",

}

TY - JOUR

T1 - Site specific dependencies of hydrogen concentrations in zirconium hydrides

AU - Tunes, Matheus A.

AU - Silva, Chinthaka M.

AU - Edmondson, Philip D.

PY - 2019

Y1 - 2019

N2 - 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 α-Zr matrix. Transmission Electron Microscopy and electron diffraction confirmed that the ZrH2−x precipitates were face-centred cubic structures consistent with the δ-ZrH2−x phase. Electron Energy Loss Spectroscopy analysis of the δ-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 δ-ZrH2−x precipitates rather than the presence of different ZrH2−x phases as has previously been assumed.

AB - 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 α-Zr matrix. Transmission Electron Microscopy and electron diffraction confirmed that the ZrH2−x precipitates were face-centred cubic structures consistent with the δ-ZrH2−x phase. Electron Energy Loss Spectroscopy analysis of the δ-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 δ-ZrH2−x precipitates rather than the presence of different ZrH2−x phases as has previously been assumed.

KW - Electron Energy Loss Spectroscopy

KW - Jahn-Teller effect

KW - Transmission electron microscopy

KW - Zirconium hydrides

UR - http://www.scopus.com/inward/record.url?scp=85052854127&partnerID=8YFLogxK

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DO - 10.1016/j.scriptamat.2018.08.044

M3 - Article

AN - SCOPUS:85052854127

SN - 1359-6462

VL - 158.2019

SP - 136

EP - 140

JO - Scripta Materialia

JF - Scripta Materialia

IS - 1 January

ER -

Site specific dependencies of hydrogen concentrations in zirconium hydrides

Abstract

Keywords

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