Factors affecting the hydriding properties of CaxEu1-xNi5 (0 ≤ x ≤ 1) compounds

N. Shamir, U. Atzmony, Z. Gavra, M. H. Mintz

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Electron spectroscopy studies (Auger electron spectroscopy, X-ray photoelectron spectroscopy and UV photoemission spectroscopy) were performed on the Haucke compounds CaxEu1-xNi5 (x = 0, 0.17 and 0.75). These compounds display widely differing hydriding characteristics for the various x values, with regard both to activation kinetics and to equilibrium properties. The analysis of the valence band structures of these compounds reveals a striking similarity. Hence the differing equilibrium properties are probably not dominated by electronic contributions. Interstitial hole size calculations indicate a slight increase in the hole radii with increasing calcium content of the compound. This may account for the trend in the stabilities of the corresponding hydrides. Surface analysis of the argon-handled as-inserted samples points to the presence of very thin (i.e. a few atomic layers) passivation films on the compounds. The variation in the reactivities of the as-inserted compounds towards hydrogen (during the first activation cycle) is attributed to the variation in the permeability characteristics of these oxidized overlayers.

Original languageEnglish
Pages (from-to)367-373
Number of pages7
JournalJournal of the Less-Common Metals
Issue number2
StatePublished - 15 Nov 1984
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering


Dive into the research topics of 'Factors affecting the hydriding properties of CaxEu1-xNi5 (0 ≤ x ≤ 1) compounds'. Together they form a unique fingerprint.

Cite this