Variation of hydriding kinetic properties in massive samples of the LaAlxNi5-x system as a function of the Al content

M. Bereznitsky; J. Bloch; M. H. Mintz; I. Jacob

doi:10.1016/S0925-8388(00)00876-8

Variation of hydriding kinetic properties in massive samples of the LaAl_xNi_5-x system as a function of the Al content

M. Bereznitsky, J. Bloch, M. H. Mintz, I. Jacob

Unit of Nuclear Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The hydriding kinetics of the LaAl_xNi_5-x (0≤x≤1.4) system was monitored for massive rectangular parallelpiped samples utilizing hydrogen pressures up to 70 atm and temperatures between 238 and 423 K. The apparent activation energies for each composition are derived from the temperature dependence of the reaction rate constants at given P/P_eq ratios, where P is the applied experimental hydrogen pressure and P_eq is the equilibrium pressure at a given temperature. The activation energies appear to be model-independent and indicate a minimum at x = 0.25, resulting in a maximum hydriding reaction rate in the vicinity of this composition. This behavior correlates well with some bulk properties of the LaAl_xNi_5-x intermetallic system and the corresponding hydrides.

Original language	English
Pages (from-to)	333-337
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	307
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(00)00876-8
State	Published - 14 Jul 2000

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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Cite this

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title = "Variation of hydriding kinetic properties in massive samples of the LaAlxNi5-x system as a function of the Al content",

abstract = "The hydriding kinetics of the LaAlxNi5-x (0≤x≤1.4) system was monitored for massive rectangular parallelpiped samples utilizing hydrogen pressures up to 70 atm and temperatures between 238 and 423 K. The apparent activation energies for each composition are derived from the temperature dependence of the reaction rate constants at given P/Peq ratios, where P is the applied experimental hydrogen pressure and Peq is the equilibrium pressure at a given temperature. The activation energies appear to be model-independent and indicate a minimum at x = 0.25, resulting in a maximum hydriding reaction rate in the vicinity of this composition. This behavior correlates well with some bulk properties of the LaAlxNi5-x intermetallic system and the corresponding hydrides.",

author = "M. Bereznitsky and J. Bloch and Mintz, {M. H.} and I. Jacob",

note = "Funding Information: This work was supported by a grant of the Israeli Council of Higher Education and the Israeli Atomic Energy Commission.",

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T1 - Variation of hydriding kinetic properties in massive samples of the LaAlxNi5-x system as a function of the Al content

AU - Bereznitsky, M.

AU - Bloch, J.

AU - Mintz, M. H.

AU - Jacob, I.

N1 - Funding Information: This work was supported by a grant of the Israeli Council of Higher Education and the Israeli Atomic Energy Commission.

PY - 2000/7/14

Y1 - 2000/7/14

N2 - The hydriding kinetics of the LaAlxNi5-x (0≤x≤1.4) system was monitored for massive rectangular parallelpiped samples utilizing hydrogen pressures up to 70 atm and temperatures between 238 and 423 K. The apparent activation energies for each composition are derived from the temperature dependence of the reaction rate constants at given P/Peq ratios, where P is the applied experimental hydrogen pressure and Peq is the equilibrium pressure at a given temperature. The activation energies appear to be model-independent and indicate a minimum at x = 0.25, resulting in a maximum hydriding reaction rate in the vicinity of this composition. This behavior correlates well with some bulk properties of the LaAlxNi5-x intermetallic system and the corresponding hydrides.

AB - The hydriding kinetics of the LaAlxNi5-x (0≤x≤1.4) system was monitored for massive rectangular parallelpiped samples utilizing hydrogen pressures up to 70 atm and temperatures between 238 and 423 K. The apparent activation energies for each composition are derived from the temperature dependence of the reaction rate constants at given P/Peq ratios, where P is the applied experimental hydrogen pressure and Peq is the equilibrium pressure at a given temperature. The activation energies appear to be model-independent and indicate a minimum at x = 0.25, resulting in a maximum hydriding reaction rate in the vicinity of this composition. This behavior correlates well with some bulk properties of the LaAlxNi5-x intermetallic system and the corresponding hydrides.

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ER -

Variation of hydriding kinetic properties in massive samples of the LaAl_xNi_5-x system as a function of the Al content

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