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Article Dans Une Revue Journal of Alloys and Compounds Année : 2023

Development of Ti-V-Nb-Cr-Mn High Entropy Alloys for Hydrogen Storage

Résumé

The development of novel high entropy alloys (HEA) of the TiVNbCrMn system for hydrogen storage is reported. The CALPHAD method was used to design alloys with a body centered cubic structures. Three alloy compositions, Ti35V35Nb20Cr5Mn5; Ti32V32Nb18Cr9Mn9; Ti27.5V27.5Nb20Cr12.5Mn12.5, were fabricated by the arc melting process and characterized by X-ray diffraction (XRD) and SEM techniques. The activation behavior during the 1st hydrogen absorption of these alloys was investigated at room temperature and 2 MPa of H2 pressure. These alloys absorb hydrogen forming FCC hydrides with high capacities of 2.47, 2.09 and 3.38 wt%, respectively. Activation kinetics and incubation times were distinct for each alloy’s composition. Hydrogen absorption/desorption cycles were performed for two alloys showing promising results since the maximum capacity of the alloys has been maintained despite a reduction in absorption kinetics.

Domaines

Matériaux
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Dates et versions

hal-04081645 , version 1 (25-04-2023)

Identifiants

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Leandro Bernardes Serrano, Maria Moussa, Jie-Yi Yao, Gilbert Silva, Jean-Louis Bobet, et al.. Development of Ti-V-Nb-Cr-Mn High Entropy Alloys for Hydrogen Storage. Journal of Alloys and Compounds, 2023, 945, pp.169289. ⟨10.1016/j.jallcom.2023.169289⟩. ⟨hal-04081645⟩
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