| Texto completo | |
| Autor(es): |
Serrano, Leandro
;
Moussa, Maria
;
Yao, Jie-Yi
;
Silva, Gilbert
;
Bobet, Jean -Louis
;
Santos, Sydney Ferreira
;
Cardoso, Katia Regina
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Alloys and Compounds; v. 945, p. 9-pg., 2023-02-17. |
| Resumo | |
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.(c) 2023 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 19/25302-6 - Ligas de alta entropia para armazenamento de hidrogênio |
| Beneficiário: | Kátia Regina Cardoso |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |