Development of Ti-V-Nb-Cr-Mn High Entropy Alloys for Hydrogen Storage
FERREIRA, Sydney
Universidade Federal do ABC = Federal University of ABC = Université Fédérale de l'ABC [Brazil] [UFABC]
< Reduce
Universidade Federal do ABC = Federal University of ABC = Université Fédérale de l'ABC [Brazil] [UFABC]
Language
en
Article de revue
This item was published in
Journal of Alloys and Compounds. 2023, vol. 945, p. 169289
Elsevier
English Abstract
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, ...Read more >
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.Read less <
English Keywords
High entropy alloys
Metal hydrides
Hydrogen storage
CALPHAD simulations
Origin
Hal imported