Mutual impact of crystal volume and heat of alloy formation on hydride stabilities in Zr(PdxCr1−x)2 and similar intermetallics

D. Babai; M. Bereznitsky; R. Z. Shneck; I. Jacob

doi:10.1016/j.jallcom.2019.152268

Mutual impact of crystal volume and heat of alloy formation on hydride stabilities in Zr(Pd_xCr_1−x)₂ and similar intermetallics

D. Babai, M. Bereznitsky, R. Z. Shneck, I. Jacob

Ben-Gurion University of the Negev

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

4 Scopus citations

Abstract

Hydrides of Zr(Pd_xCr_1−x)₂ pseudobinary compounds (x = 0.05, 0.1, 0.175) exhibit slight destabilization and more sloped hydrogen plateau pressures with the increase of the palladium content. The former feature conforms to the rule of reverse stability but violates the trend of increased hydride stability upon increasing the unit cell intermetallic volume. A combination of the two effects, the heat of alloy formation and the crystal volume, shows better correlation with the hydride stabilities than considering separately each property. Hydrogen absorption is found in ZrPd₂ at ∼60 atm and associated with its moderate shear modulus.

Original language	English
Article number	152268
Journal	Journal of Alloys and Compounds
Volume	814
DOIs	https://doi.org/10.1016/j.jallcom.2019.152268
State	Published - 25 Jan 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Funding

This research was supported by the Israel Science Foundation (grant No. 745/15 ). The authors acknowledge the support of Dr. Dmitry Mogilyanski and Prof. Giora Kimmel in the X-ray work, and are grateful to Dr. Ori Yeheskel for helpful discussions on the ultrasonic measurements. This work is dedicated to late Professor David Shaltiel.

Funders	Funder number
Israel Science Foundation	745/15

Keywords

Correlation with heat of alloy formation and unit cell volume
Hydrogen absorbing materials
Hydrogen absorption in the “hydrogen-inert” ZrPd
Zr(PdCr) pseudobinary intermetallic compounds

Access to Document

10.1016/j.jallcom.2019.152268

Cite this

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title = "Mutual impact of crystal volume and heat of alloy formation on hydride stabilities in Zr(PdxCr1−x)2 and similar intermetallics",

abstract = "Hydrides of Zr(PdxCr1−x)2 pseudobinary compounds (x = 0.05, 0.1, 0.175) exhibit slight destabilization and more sloped hydrogen plateau pressures with the increase of the palladium content. The former feature conforms to the rule of reverse stability but violates the trend of increased hydride stability upon increasing the unit cell intermetallic volume. A combination of the two effects, the heat of alloy formation and the crystal volume, shows better correlation with the hydride stabilities than considering separately each property. Hydrogen absorption is found in ZrPd2 at ∼60 atm and associated with its moderate shear modulus.",

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