Oxidation mechanism of porous Zr2Fe used as a hydrogen getter

Dror Cohen; Moshe Nahmani; Genadi Rafailov; Smadar Attia; Zorik Shamish; Miron Landau; Jose Merchuk; Yehuda Zeiri

doi:10.1016/j.apradiso.2015.09.006

Oxidation mechanism of porous Zr₂Fe used as a hydrogen getter

Dror Cohen, Moshe Nahmani, Genadi Rafailov, Smadar Attia, Zorik Shamish, Miron Landau, Jose Merchuk, Yehuda Zeiri

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

9 Scopus citations

Abstract

We determined the oxidation mechanism of porous ST-198, which mainly comprises Zr₂Fe. Oxidation kinetics depended on temperature, oxygen partial pressure, and oxidation extent. The passivation role of oxidation in hydrogen scavenging is probably due to the development of a surface oxide, independent of oxygen concentration. Zr₂Fe would be a superior hydrogen getter in oxygen-contaminated environments at high temperatures, as most oxygen will be consumed at the outer shell by mass transfer limitations, protecting the bulk of the getter for hydrogen scavenging.

Original language	English
Pages (from-to)	47-56
Number of pages	10
Journal	Applied Radiation and Isotopes
Volume	107
DOIs	https://doi.org/10.1016/j.apradiso.2015.09.006
State	Published - 1 Jan 2016

Keywords

Hydrogen getter degradation
Hydrogen isotope absorbing materials
Oxidation kinetics
Thermal analysis
Zirconium-iron intermetallics

ASJC Scopus subject areas

Radiation

Access to Document

10.1016/j.apradiso.2015.09.006

Cite this

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title = "Oxidation mechanism of porous Zr2Fe used as a hydrogen getter",

abstract = "We determined the oxidation mechanism of porous ST-198, which mainly comprises Zr2Fe. Oxidation kinetics depended on temperature, oxygen partial pressure, and oxidation extent. The passivation role of oxidation in hydrogen scavenging is probably due to the development of a surface oxide, independent of oxygen concentration. Zr2Fe would be a superior hydrogen getter in oxygen-contaminated environments at high temperatures, as most oxygen will be consumed at the outer shell by mass transfer limitations, protecting the bulk of the getter for hydrogen scavenging.",

keywords = "Hydrogen getter degradation, Hydrogen isotope absorbing materials, Oxidation kinetics, Thermal analysis, Zirconium-iron intermetallics",

author = "Dror Cohen and Moshe Nahmani and Genadi Rafailov and Smadar Attia and Zorik Shamish and Miron Landau and Jose Merchuk and Yehuda Zeiri",

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T1 - Oxidation mechanism of porous Zr2Fe used as a hydrogen getter

AU - Cohen, Dror

AU - Nahmani, Moshe

AU - Rafailov, Genadi

AU - Attia, Smadar

AU - Shamish, Zorik

AU - Landau, Miron

AU - Merchuk, Jose

AU - Zeiri, Yehuda

PY - 2016/1/1

Y1 - 2016/1/1

N2 - We determined the oxidation mechanism of porous ST-198, which mainly comprises Zr2Fe. Oxidation kinetics depended on temperature, oxygen partial pressure, and oxidation extent. The passivation role of oxidation in hydrogen scavenging is probably due to the development of a surface oxide, independent of oxygen concentration. Zr2Fe would be a superior hydrogen getter in oxygen-contaminated environments at high temperatures, as most oxygen will be consumed at the outer shell by mass transfer limitations, protecting the bulk of the getter for hydrogen scavenging.

AB - We determined the oxidation mechanism of porous ST-198, which mainly comprises Zr2Fe. Oxidation kinetics depended on temperature, oxygen partial pressure, and oxidation extent. The passivation role of oxidation in hydrogen scavenging is probably due to the development of a surface oxide, independent of oxygen concentration. Zr2Fe would be a superior hydrogen getter in oxygen-contaminated environments at high temperatures, as most oxygen will be consumed at the outer shell by mass transfer limitations, protecting the bulk of the getter for hydrogen scavenging.

KW - Hydrogen getter degradation

KW - Hydrogen isotope absorbing materials

KW - Oxidation kinetics

KW - Thermal analysis

KW - Zirconium-iron intermetallics

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DO - 10.1016/j.apradiso.2015.09.006

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AN - SCOPUS:84942284407

SN - 0969-8043

VL - 107

SP - 47

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JO - Applied Radiation and Isotopes

JF - Applied Radiation and Isotopes

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