Temperature driven hydrogen-induced disproportionation of Zr2Cu

Masanori Hara; Yukiko Hayashi; Kuniaki Watanabe

doi:10.1016/j.jallcom.2009.07.179

Temperature driven hydrogen-induced disproportionation of Zr₂Cu

Masanori Hara^*, Yukiko Hayashi, Kuniaki Watanabe

^*Corresponding author for this work

Hydrogen Isotope Research Center, Organization for Promotion of Research

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

6 Scopus citations

Abstract

The absorption of hydrogen by Zr₂Cu was studied by the aid of the Zr₂Cu-H phase diagram elaborated by Kadel and Weiss. It was found that Zr₂Cu hydride was formed at ambient temperature after moderate hydrogen absorption. Hydrogen-induced disproportionation of Zr₂Cu occurred at temperatures exceeding 550 K. The unknown compound of the γ phase reported by Kadel and Weiss was identified as Zr₇Cu₁₀. It was also found that the β phase consisted of ZrCu and Zr hydride instead of Zr₂CuH_{x, x = 1.0-1.4}. The disproportionation behavior was found to follow a different mechanism below and above 973 K. Below 973 K the disproportionation was found to proceed by the reaction sequence, Zr₂Cu + H₂ → Zr₇Cu₁₀ + ZrH_x + H₂(γ phase) → Zr₁₄Cu₅₁ + ZrH_x + H₂(δ phase), and above 973 K via the sequence, Zr₂Cu + H₂ → ZrCu + ZrH_x + H₂(β phase) → Zr₇Cu₁₀ + ZrH_x + H₂(δ phase). The difference could be explained by the thermodynamic stability of ZrCu intermetallic compounds.

Original language	English
Pages (from-to)	489-493
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	487
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2009.07.179
State	Published - 2009/11/13

Keywords

Hydrogen-induced disproportionation
Metal hydride
Zr alloy
ZrCu

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2009.07.179

Cite this

@article{56d3122d66b249948c474a2863acad85,

title = "Temperature driven hydrogen-induced disproportionation of Zr2Cu",

abstract = "The absorption of hydrogen by Zr2Cu was studied by the aid of the Zr2Cu-H phase diagram elaborated by Kadel and Weiss. It was found that Zr2Cu hydride was formed at ambient temperature after moderate hydrogen absorption. Hydrogen-induced disproportionation of Zr2Cu occurred at temperatures exceeding 550 K. The unknown compound of the γ phase reported by Kadel and Weiss was identified as Zr7Cu10. It was also found that the β phase consisted of ZrCu and Zr hydride instead of Zr2CuHx, x = 1.0-1.4. The disproportionation behavior was found to follow a different mechanism below and above 973 K. Below 973 K the disproportionation was found to proceed by the reaction sequence, Zr2Cu + H2 → Zr7Cu10 + ZrHx + H2(γ phase) → Zr14Cu51 + ZrHx + H2(δ phase), and above 973 K via the sequence, Zr2Cu + H2 → ZrCu + ZrHx + H2(β phase) → Zr7Cu10 + ZrHx + H2(δ phase). The difference could be explained by the thermodynamic stability of ZrCu intermetallic compounds.",

keywords = "Hydrogen-induced disproportionation, Metal hydride, Zr alloy, ZrCu",

author = "Masanori Hara and Yukiko Hayashi and Kuniaki Watanabe",

year = "2009",

month = nov,

day = "13",

doi = "10.1016/j.jallcom.2009.07.179",

language = "英語",

volume = "487",

pages = "489--493",

journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Temperature driven hydrogen-induced disproportionation of Zr2Cu

AU - Hara, Masanori

AU - Hayashi, Yukiko

AU - Watanabe, Kuniaki

PY - 2009/11/13

Y1 - 2009/11/13

N2 - The absorption of hydrogen by Zr2Cu was studied by the aid of the Zr2Cu-H phase diagram elaborated by Kadel and Weiss. It was found that Zr2Cu hydride was formed at ambient temperature after moderate hydrogen absorption. Hydrogen-induced disproportionation of Zr2Cu occurred at temperatures exceeding 550 K. The unknown compound of the γ phase reported by Kadel and Weiss was identified as Zr7Cu10. It was also found that the β phase consisted of ZrCu and Zr hydride instead of Zr2CuHx, x = 1.0-1.4. The disproportionation behavior was found to follow a different mechanism below and above 973 K. Below 973 K the disproportionation was found to proceed by the reaction sequence, Zr2Cu + H2 → Zr7Cu10 + ZrHx + H2(γ phase) → Zr14Cu51 + ZrHx + H2(δ phase), and above 973 K via the sequence, Zr2Cu + H2 → ZrCu + ZrHx + H2(β phase) → Zr7Cu10 + ZrHx + H2(δ phase). The difference could be explained by the thermodynamic stability of ZrCu intermetallic compounds.

AB - The absorption of hydrogen by Zr2Cu was studied by the aid of the Zr2Cu-H phase diagram elaborated by Kadel and Weiss. It was found that Zr2Cu hydride was formed at ambient temperature after moderate hydrogen absorption. Hydrogen-induced disproportionation of Zr2Cu occurred at temperatures exceeding 550 K. The unknown compound of the γ phase reported by Kadel and Weiss was identified as Zr7Cu10. It was also found that the β phase consisted of ZrCu and Zr hydride instead of Zr2CuHx, x = 1.0-1.4. The disproportionation behavior was found to follow a different mechanism below and above 973 K. Below 973 K the disproportionation was found to proceed by the reaction sequence, Zr2Cu + H2 → Zr7Cu10 + ZrHx + H2(γ phase) → Zr14Cu51 + ZrHx + H2(δ phase), and above 973 K via the sequence, Zr2Cu + H2 → ZrCu + ZrHx + H2(β phase) → Zr7Cu10 + ZrHx + H2(δ phase). The difference could be explained by the thermodynamic stability of ZrCu intermetallic compounds.

KW - Hydrogen-induced disproportionation

KW - Metal hydride

KW - Zr alloy

KW - ZrCu

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