Issues $\rightarrow$ Volume 25, Issue 3 (2024)

Effect of Alloying on the Hydrogen Sorption in Ti–Zr–Mn-Based Alloys. Pt. 1: C14-Type Laves-Phase-Based Alloys

DEKHTYARENKO V.A.$^{1,2}$, PRYADKO T.V.$^1$, VLADIMIROVA T.P.$^1$, MAKSYMOVA S.V.$^2$, MYKHAILOVA H.Yu.$^1$, and BONDARCHUK V.I.$^1$

$^1$G.V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^2$E.O. Paton Electric Welding Institute of the N.A.S. of Ukraine, 11 Kazymyr Malevych Str., UA-03150 Kyiv, Ukraine

Received 12.03.2024, final version 05.08.2024 Download PDF logo PDF

Abstract
The alloys of the Ti–Zr–Mn system based on the C14-type Laves phase are considered as ones of the most promising materials for safe storage and transportation of hydrogen. These alloys have appropriate parameters for activating the processes of absorption and release of hydrogen, a low cost, and a fairly high cyclic stability. In this work, the microstructure and phase composition of the starting alloys and the crystal structure of the hydrides synthesized from them are studied. Possible ways to reduce the cost of the final products are shown. The fact that changing the method of the alloy fabrication does not significantly affect its hydrogen absorption properties is shown. On the example of the considered alloys, it is shown that, as expected, alloying with an element with a larger atomic radius that forms a stable chemical compound with hydrogen results in an increase in the hydrogen capacity. This is explained by both the increased radius of the tetrahedral interstitial sites, where hydrogen atoms are located after dissolution, and the higher total amount of the element interacting with hydrogen.

Keywords: Laves phase, intermetallic compound, alloying element, tetrahedral interstitial sites, hydrogenation–dehydrogenation, hydrogen capacity.

DOI: https://doi.org/10.15407/ufm.25.03.520

Citation: V.A. Dekhtyarenko, T.V. Pryadko, T.P. Vladimirova, S.V. Maksymova, H.Yu. Mykhailova, and V.I. Bondarchuk, Effect of Alloying on the Hydrogen Sorption in Ti–Zr–Mn-Based Alloys. Pt. 1: C14-Type Laves-Phase-Based Alloys, Progress in Physics of Metals, 25, No. 3: 520–544 (2024)

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