Microstructure and First Hydrogenation Properties of Ti 16 V 60 Cr 24−x Fe x + 4 wt.% Zr Alloy for x = 0, 4, 8, 12, 16, 20, 24

Francia Ravalison and Jacques Huot ()
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Francia Ravalison: Hydrogen Research Institute, Université du Québec à Trois-Rivières, Trois-Rivières, QC G9A5H7, Canada
Jacques Huot: Hydrogen Research Institute, Université du Québec à Trois-Rivières, Trois-Rivières, QC G9A5H7, Canada

Energies, 2023, vol. 16, issue 14, 1-13

Abstract: In body-centered cubic (BCC) alloys of transition elements, elemental addition or substitution in the vanadium-based alloys can be beneficial for improving the hydrogen storage properties and for reducing the production cost. In this context, the current study focused on the effect of the substitution of Cr by Fe in Ti 16 V 60 Cr 24−x Fe x + 4 wt.% Zr alloys where x = 0, 4, 8, 12, 16, 20, 24. The microstructure of each alloy was composed of a matrix having a chemical composition close to the nominal one and a Zr-rich region. From X-ray diffraction patterns, it was found that the matrix has a BCC structure, and the Zr-rich regions present the C14 Laves phase structure. The lattice parameter of BCC phases decreased linearly with x, in accordance with Vegard’s law. The measurement of the first hydrogenation at 298 K under 3 MPa of hydrogen revealed a decrease in the maximum hydrogen capacity: 3.8 wt.% for x = 0, 3.1 wt.% for x = 4 and around 2 wt.% for x = 8 to 24. The XRD patterns after hydrogenation showed a BCT phase for all alloys, with a C14 phase for x = 4, 8, 12 and with C14 and C15 for x = 16, 20 and 24.

Keywords: hydrogen storage; vanadium-rich alloy; BCC alloys; kinetics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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