Site specific dependencies of hydrogen concentrations in zirconium hydrides

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

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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 languageEnglish
Pages (from-to)136-140
Number of pages5
JournalScripta Materialia
Issue number1 January
Early online date5 Sept 2018
Publication statusPublished - 2019
Externally publishedYes


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

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