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Hydrogen in amorphous Ni–Zr: Pressure concentration isotherms, site occupation, and binding energies

Published online by Cambridge University Press:  29 June 2016

E. Batalla ,
J. O. Strom-Olsen ,
Z. Altounian ,
D. Boothroyd  and
R. Harris
E. Batalla
Affiliation:
Rutherford Physics Building, McGill University, 3600 University Street, Montreal, Quebec, Canada H3A 2T8
J. O. Strom-Olsen
Affiliation:
Rutherford Physics Building, McGill University, 3600 University Street, Montreal, Quebec, Canada H3A 2T8
Z. Altounian
Affiliation:
Rutherford Physics Building, McGill University, 3600 University Street, Montreal, Quebec, Canada H3A 2T8
D. Boothroyd
Affiliation:
Rutherford Physics Building, McGill University, 3600 University Street, Montreal, Quebec, Canada H3A 2T8
R. Harris
Affiliation:
Rutherford Physics Building, McGill University, 3600 University Street, Montreal, Quebec, Canada H3A 2T8
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Abstract

Measurements of pressure-concentration (p-c) isotherms of hydrogen in a wide variety of amorphous Ni—Zr alloys are presented. The measurements are complemented by an analysis of hydrogen sites in computer-generated amorphous clusters. The binding energy of these sites has been calculated using an effective medium theory. Filling these sites randomly in order of decreasing binding energy with a nearest-neighbor exclusion leads to a chemical potential in agreement with what is found from the (p-c) isotherms. In the pressure range required in a hydrogen-storage device (1–10 atm) the hydrogen occupies interstitial sites surrounded by 3Zr, 1Ni atoms or 2Zr, 2Ni atoms.

Type
Articles
Information
Journal of Materials Research , Volume 1 , Issue 6 , December 1986 , pp. 765 - 773
Copyright
Copyright © Materials Research Society 1986

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