| Texto completo | |
| Autor(es): |
Vicente, Igor S.
;
Andrade, Gaspar
;
Silva, Bruno Hessel
;
Ponsoni, Jessica Bruna
;
Dias, Jeferson Almeida
;
Zepon, Guilherme
;
Strozi, Renato Belli
;
Sartori, Sabrina
;
Floriano, Ricardo
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ENERGY & FUELS; v. 39, n. 33, p. 15-pg., 2025-08-07. |
| Resumo | |
This study investigates the dual-phase configuration of multicomponent alloys (MCAs) within the Ti21Zr21V x Fe y Ni z (x + y + z = 58 at %) system for hydrogen storage. The design strategy involved the use of the Calculation of Phase Diagrams (CALPHAD) method, which obtained four dual-phase alloys with varying proportions of C14 Laves and body-centered cubic (BCC) phases. All alloys exhibited fast hydrogen absorption kinetics, reaching maximum capacity within 5 min, and demonstrated good hydrogen storage capacity at room temperature. Ti21Zr21Fe41Ni17 (V1), with the lower BCC content (8.2 wt %), absorbed the lowest amount of hydrogen (1.2 wt %), whereas Ti21Zr21V14Fe4.3Ni39.7 (V4) absorbed up to 1.7 wt %. When analyzing the thermodynamics of the alloys, V1 exhibited a superior reversible hydrogen capacity of 0.91 wt % when compared to V4, which retained 0.56 wt %. This behavior is attributed to the thermodynamic stability of the C14 Laves phase, which predominantly governs the absorption characteristics at room temperature, as confirmed by pressure-composition-temperature (PCT) simulations, and to hydrogen retention within the BCC structure. (AU) | |
| Processo FAPESP: | 23/09126-9 - Design, Síntese e Caracterização das Propriedades de Armazenamento de Hidrogênio em Ligas Multicomponentes do Sistema TiZrNbCrNiCo e TiZrVFeNi |
| Beneficiário: | Igor Spegiorin Vicente |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 22/03024-7 - Estrutura, processamento e propriedade de ligas multicomponentes avançadas para as aplicações biomédicas e armazenagem de energia |
| Beneficiário: | Ricardo Floriano |
| Modalidade de apoio: | Auxílio à Pesquisa - Projeto Inicial |