Electrochemical and metallographic characterization of Ni-NiO-NiBi3 equilibrium in molten lead-bismuth eutectic

Giacomo Gregori; Valentyn Tsisar; Thomas Doneux; Jun Lim

doi:10.1016/j.jnucmat.2023.154866

Electrochemical and metallographic characterization of Ni-NiO-NiBi₃ equilibrium in molten lead-bismuth eutectic

Giacomo Gregori, Valentyn Tsisar, Thomas Doneux, Jun Lim

Research output › peer-review

Abstract

This study aims to investigate the chemistry of the Ni-O-Pb-Bi system through a combined microscopic and electrochemical analysis of the Ni-NiO-NiBi ₃ equilibrium in molten lead-bismuth eutectic (LBE). Through SEM-EDX metallographic characterization, we examined to the precipitates formed on the solid nickel substrate in molten LBE, confirming the formation of the NiBi ₃ within the temperature range of 469–748 K. Subsequently, we induced the Ni _(LBE)-NiO ₍ _s ₎-NiBi _3(s) ternary equilibrium in LBE and measured the equilibrium oxygen concentrations at different temperatures. The equilibrium nickel activity was derived using the measured equilibrium oxygen concentration in the temperature range of 518–595 K. Finally, the Ni-Bi IMCs floating on LBE at the end of the measurements were collected and characterized by X-ray diffraction (XRD), confirming the presence of the NiBi ₃ phase.

Original language	English
Article number	154866
Number of pages	10
Journal	Journal of Nuclear Materials
Volume	589
DOIs	https://doi.org/10.1016/j.jnucmat.2023.154866
State	Published - Feb 2024

ASJC Scopus subject areas

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

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10.1016/j.jnucmat.2023.154866

Cite this

@article{85d58abc7b814aa78d164079eec5655a,

title = "Electrochemical and metallographic characterization of Ni-NiO-NiBi3 equilibrium in molten lead-bismuth eutectic",

abstract = "This study aims to investigate the chemistry of the Ni-O-Pb-Bi system through a combined microscopic and electrochemical analysis of the Ni-NiO-NiBi 3 equilibrium in molten lead-bismuth eutectic (LBE). Through SEM-EDX metallographic characterization, we examined to the precipitates formed on the solid nickel substrate in molten LBE, confirming the formation of the NiBi 3 within the temperature range of 469–748 K. Subsequently, we induced the Ni (LBE)-NiO ( s )-NiBi 3(s) ternary equilibrium in LBE and measured the equilibrium oxygen concentrations at different temperatures. The equilibrium nickel activity was derived using the measured equilibrium oxygen concentration in the temperature range of 518–595 K. Finally, the Ni-Bi IMCs floating on LBE at the end of the measurements were collected and characterized by X-ray diffraction (XRD), confirming the presence of the NiBi 3 phase.",

keywords = "Ni-Bi intermetallic, NiBi3, NiO, Nickel activity LBE, Lead-bismuth eutectic, Corrosion products, NiBi",

author = "Giacomo Gregori and Valentyn Tsisar and Thomas Doneux and Jun Lim",

note = "Score=10 Funding Information: This study was financially supported by Belgian Government through the MYRRHA project . The authors would like to thank Stefan Huysmans and Ladislav Molnar (SCK CEN) for the technical support. Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2024",

month = feb,

doi = "10.1016/j.jnucmat.2023.154866",

language = "English",

volume = "589",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

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TY - JOUR

T1 - Electrochemical and metallographic characterization of Ni-NiO-NiBi3 equilibrium in molten lead-bismuth eutectic

AU - Gregori, Giacomo

AU - Tsisar, Valentyn

AU - Doneux, Thomas

AU - Lim, Jun

N1 - Score=10 Funding Information: This study was financially supported by Belgian Government through the MYRRHA project . The authors would like to thank Stefan Huysmans and Ladislav Molnar (SCK CEN) for the technical support. Publisher Copyright: © 2023 Elsevier B.V.

PY - 2024/2

Y1 - 2024/2

N2 - This study aims to investigate the chemistry of the Ni-O-Pb-Bi system through a combined microscopic and electrochemical analysis of the Ni-NiO-NiBi 3 equilibrium in molten lead-bismuth eutectic (LBE). Through SEM-EDX metallographic characterization, we examined to the precipitates formed on the solid nickel substrate in molten LBE, confirming the formation of the NiBi 3 within the temperature range of 469–748 K. Subsequently, we induced the Ni (LBE)-NiO ( s )-NiBi 3(s) ternary equilibrium in LBE and measured the equilibrium oxygen concentrations at different temperatures. The equilibrium nickel activity was derived using the measured equilibrium oxygen concentration in the temperature range of 518–595 K. Finally, the Ni-Bi IMCs floating on LBE at the end of the measurements were collected and characterized by X-ray diffraction (XRD), confirming the presence of the NiBi 3 phase.

AB - This study aims to investigate the chemistry of the Ni-O-Pb-Bi system through a combined microscopic and electrochemical analysis of the Ni-NiO-NiBi 3 equilibrium in molten lead-bismuth eutectic (LBE). Through SEM-EDX metallographic characterization, we examined to the precipitates formed on the solid nickel substrate in molten LBE, confirming the formation of the NiBi 3 within the temperature range of 469–748 K. Subsequently, we induced the Ni (LBE)-NiO ( s )-NiBi 3(s) ternary equilibrium in LBE and measured the equilibrium oxygen concentrations at different temperatures. The equilibrium nickel activity was derived using the measured equilibrium oxygen concentration in the temperature range of 518–595 K. Finally, the Ni-Bi IMCs floating on LBE at the end of the measurements were collected and characterized by X-ray diffraction (XRD), confirming the presence of the NiBi 3 phase.

KW - Ni-Bi intermetallic

KW - NiBi3

KW - NiO

KW - Nickel activity LBE

KW - Lead-bismuth eutectic

KW - Corrosion products

KW - NiBi

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/82095176

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U2 - 10.1016/j.jnucmat.2023.154866

DO - 10.1016/j.jnucmat.2023.154866

M3 - Article

SN - 0022-3115

VL - 589

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 154866

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