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Interactions of hydrogen with Tb3Ni6M2 (M= Al, Ga, or Si) alloys with structures of Ce3Ni6Si2 type

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Soviet materials science : a transl. of Fiziko-khimicheskaya mekhanika materialov / Academy of Sciences of the Ukrainian SSR Aims and scope

Summary

A crystallochemical analysis has been performed on the structures of Tb3Ni6M2 (M = Al, Ga, Si), which crystallize in the Ce3Ni6Si2 structure type, as they are potential hydrogen absorbers. There are seven types of cavity suitable for hydrogen atoms. When the Tb3Ni6M2 intermetallides interact with hydrogen, hydride phases are formed that contain 0.32-0.95 mass % H and which decompose completely in the range 20–300°C. The hydrogen contents in the hydrides and the thermal stabilities decrease in the aluminide-gallide-silicide sequence. Hydrogenation produces isotropic expansion in the initial body-centered cubic structures. Neutron diffraction indicates that the deuterium atoms in Tb3Ni6Al2D6.5 occupy the Tb3Al, TbNi3, and Ni4 cavities.

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  1. Karpenko Physicomechanics Institute, Ukrainian Academy of Sciences, L'viv

    V. A. Yartis' & V. V. Pavlen

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  1. V. A. Yartis'
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  2. V. V. Pavlen
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Translated from Fiziko-Khimicheskaya Mekhanika Materialov, Vol. 27, No. 4, pp. 22–25, July–August, 1991.

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Yartis', V.A., Pavlen, V.V. Interactions of hydrogen with Tb3Ni6M2 (M= Al, Ga, or Si) alloys with structures of Ce3Ni6Si2 type. Mater Sci 27, 350–353 (1992). https://doi.org/10.1007/BF00723223

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  • DOI: https://doi.org/10.1007/BF00723223

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