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 journalArticlepeer-review

3 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 languageEnglish
Pages (from-to)47-56
Number of pages10
JournalApplied Radiation and Isotopes
Volume107
DOIs
StatePublished - 1 Jan 2016

Keywords

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

ASJC Scopus subject areas

  • Radiation

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