SERRANO, Leandro; MOUSSA, Maria; YAO, Jie-Yi; SILVA, Gilbert; BOBET, Jean-Louis; FERREIRA, Sydney; KÁTIA, Regina

doi:10.1016/j.jallcom.2023.169289

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SERRANO, Leandro
Universidade Federal de Itajubá = Federal University of Itajubá

MOUSSA, Maria
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

YAO, Jie-Yi
Universidade Federal de São Paulo

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Journal of Alloys and Compounds. 2023, vol. 945, p. 169289

Elsevier

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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.< Réduire

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High entropy alloys

Metal hydrides

Hydrogen storage

CALPHAD simulations

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

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