Hydrogen absorption in Zr(AlxB1-x)2 (BFe, Co) laves phase compounds

I. Jacob, D. Shaltiel

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Abstract

The hydrogen absorption capacity of the systems Zr(AlxFe1-x)2 and Zr(AlxCo1-x)2 (0≤ x ≤1) was measured at hydrogen pressure of 70 atm and room temperature and at 40 atm and liquid nitrogen temperature. The two systems present very interesting and unexpected results. A dramatic rise in the hydrogen capacity occurs for small x values similar to previous results for the systems Zr(AxB1-x)2 (A V, Cr, Mn; B Fe, Co; 0≤x≤1). The maximum hydrogen content in both systems is achieved for x ≈ 2 12 at 40 atm and 80 K. Further increase of the Al content leads, however, to a steep decrease in the hydrogen capacity. This general behaviour is well described by a phenomenological model, recently proposed by us, and thus supporting the importance of short-range neighbouring effects for the hydrogen absorption capacity. The influence of Al on the hydrogen sorption properties in different intermetallic compounds is discussed.

Original languageEnglish
Pages (from-to)175-180
Number of pages6
JournalSolid State Communications
Volume27
Issue number2
DOIs
StatePublished - 1 Jan 1978
Externally publishedYes

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