Hydriding kinetic properties in massive Zr(AlxCo1-x)2 samples as a function of the Al content

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

doi:10.1016/S0925-8388(02)00879-4

Hydriding kinetic properties in massive Zr(Al_xCo_1-x)₂ samples as a function of the Al content

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

Unit of Nuclear Engineering

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

8 Scopus citations

Abstract

The hydriding kinetics of the Zr(Al_xCo_1-x)₂ (0.1≤x≤0.5) system was monitored for massive rectangular parallelepiped samples utilizing hydrogen pressures up to 80 atm and temperatures between 238 K and 293 K. The use of temperatures higher than 20 °C was restricted in most cases due to the appearance of self-heating effects. The experimental data were fit to a shrinking core model. The apparent activation energies, E_a, 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. A minimum of E_a was detected for the x=0.25 compound. Similar behavior has been also observed in other Al-containing pseudobinary compounds, but it seems that this effect is most prominent in the Zr(Al_xCo_1-x)₂ system.

Original language	English
Pages (from-to)	316-320
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	349
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(02)00879-4
State	Published - 3 Feb 2003

Keywords

Gas-solid reactions
Hydrogen absorbing materials
Kinetics
Transition metal compounds

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/S0925-8388(02)00879-4

Cite this

@article{f9689eb7b1e546b68530965caf85e945,

title = "Hydriding kinetic properties in massive Zr(AlxCo1-x)2 samples as a function of the Al content",

abstract = "The hydriding kinetics of the Zr(AlxCo1-x)2 (0.1≤x≤0.5) system was monitored for massive rectangular parallelepiped samples utilizing hydrogen pressures up to 80 atm and temperatures between 238 K and 293 K. The use of temperatures higher than 20 °C was restricted in most cases due to the appearance of self-heating effects. The experimental data were fit to a shrinking core model. The apparent activation energies, Ea, 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. A minimum of Ea was detected for the x=0.25 compound. Similar behavior has been also observed in other Al-containing pseudobinary compounds, but it seems that this effect is most prominent in the Zr(AlxCo1-x)2 system.",

keywords = "Gas-solid reactions, Hydrogen absorbing materials, Kinetics, Transition metal compounds",

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

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

year = "2003",

month = feb,

day = "3",

doi = "10.1016/S0925-8388(02)00879-4",

language = "English",

volume = "349",

pages = "316--320",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

number = "1-2",

}

TY - JOUR

T1 - Hydriding kinetic properties in massive Zr(AlxCo1-x)2 samples as a function of the Al content

AU - Bereznitsky, M.

AU - Jacob, Izi

AU - Bloch, J.

AU - Mintz, M. H.

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

PY - 2003/2/3

Y1 - 2003/2/3

N2 - The hydriding kinetics of the Zr(AlxCo1-x)2 (0.1≤x≤0.5) system was monitored for massive rectangular parallelepiped samples utilizing hydrogen pressures up to 80 atm and temperatures between 238 K and 293 K. The use of temperatures higher than 20 °C was restricted in most cases due to the appearance of self-heating effects. The experimental data were fit to a shrinking core model. The apparent activation energies, Ea, 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. A minimum of Ea was detected for the x=0.25 compound. Similar behavior has been also observed in other Al-containing pseudobinary compounds, but it seems that this effect is most prominent in the Zr(AlxCo1-x)2 system.

AB - The hydriding kinetics of the Zr(AlxCo1-x)2 (0.1≤x≤0.5) system was monitored for massive rectangular parallelepiped samples utilizing hydrogen pressures up to 80 atm and temperatures between 238 K and 293 K. The use of temperatures higher than 20 °C was restricted in most cases due to the appearance of self-heating effects. The experimental data were fit to a shrinking core model. The apparent activation energies, Ea, 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. A minimum of Ea was detected for the x=0.25 compound. Similar behavior has been also observed in other Al-containing pseudobinary compounds, but it seems that this effect is most prominent in the Zr(AlxCo1-x)2 system.

KW - Gas-solid reactions

KW - Hydrogen absorbing materials

KW - Kinetics

KW - Transition metal compounds

UR - http://www.scopus.com/inward/record.url?scp=0037415228&partnerID=8YFLogxK

U2 - 10.1016/S0925-8388(02)00879-4

DO - 10.1016/S0925-8388(02)00879-4

M3 - Article

AN - SCOPUS:0037415228

SN - 0925-8388

VL - 349

SP - 316

EP - 320

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -