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.
authors.affiliation: Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel; Nuclear Research Centre-Negev, P.O. Box 9001, Beer-Sheva 84190, Israel. Electronic address: dror@post.bgu.ac.il.
authors.forename: Dror
authors.initials: D
authors.lastname: Cohen
authors.affiliation: Nuclear Research Centre-Negev, P.O. Box 9001, Beer-Sheva 84190, Israel.
authors.forename: Moshe
authors.initials: M
authors.lastname: Nahmani
authors.affiliation: Nuclear Research Centre-Negev, P.O. Box 9001, Beer-Sheva 84190, Israel.
authors.forename: Genadi
authors.initials: G
authors.lastname: Rafailov
authors.affiliation: Israel Atomic Energy Commission, Tel Aviv 61070, Israel.
authors.forename: Smadar
authors.initials: S
authors.lastname: Attia
authors.affiliation: Nuclear Research Centre-Negev, P.O. Box 9001, Beer-Sheva 84190, Israel.
authors.forename: Zorik
authors.initials: Z
authors.lastname: Shamish
authors.affiliation: Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
authors.forename: Miron
authors.initials: M
authors.lastname: Landau
authors.affiliation: Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
authors.forename: Jose
authors.initials: J
authors.lastname: Merchuk
authors.affiliation: Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel; Nuclear Research Centre-Negev, P.O. Box 9001, Beer-Sheva 84190, Israel.
authors.forename: Yehuda
authors.initials: Y
authors.lastname: Zeiri
keywords: Hydrogen getter degradation; Hydrogen isotope absorbing materials; Oxidation kinetics; Thermal analysis; Zirconium–iron intermetallics