Ligas de alta entropia do tipo A2B para aplicação em armazenagem de hidrogênio
- Auxílios pontuais (curta duração)
| Texto completo | |
| Autor(es): |
Marquez, Jose J.
[1]
;
Leiva, Daniel R.
[2]
;
Floriano, Ricardo
[3]
;
Soyama, Juliano
[2, 4]
;
Silva, Wagner B.
[1]
;
Ishikawa, Tomaz T.
[2]
;
Kiminami, Claudio S.
[2]
;
Botta, Walter J.
[2]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Univ Fed Sao Carlos, Programa Posgrad Ciencia & Engn Mat, Rod Washington Luiz Km 235, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Dept Engn Mat, Rod Washington Luiz Km 235, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Estadual Campinas, Fac Ciencias Aplicadas, Rua Pedro Zaccaria 1300, BR-13484350 Limeira, SP - Brazil
[4] Univ Fed ABC, Ave Estados 5001, BR-09210170 Santo Andre - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 43, n. 29, p. 13348-13355, JUL 19 2018. |
| Citações Web of Science: | 7 |
| Resumo | |
Mg-AB(5) composites are promising systems for hydrogen storage applications, due to their possibility of hydrogen cycling at relatively low temperatures. Traditionally, these composites are mainly processed by high-energy ball milling (HEBM) techniques employing longer processing times. In this study, cold rolling was applied to prepare MgH2-LaNi5 composites and the hydrogen storage properties were investigated. The materials were processed using a vertical rolling mill under argon atmosphere, leading to a good homogeneity and no contamination at shorter processing times. The mixture of MgH2-1.50 mol.% LaNi5 showed the best hydrogen storage properties at 200 degrees C and 100 degrees C and the lowest desorption temperature even when compared to cold rolled MgH2. The results indicate that the composite MgH2-LaNi5 is transformed into a mixture of three phases MgH2, Mg2NiH4 and LaH3 upon hydrogen absorption/desorption cycles. The synergetic effect among these phases when in appropriate proportion in the sample seems to play a crucial role in the acceleration of hydrogen absorption/desorption kinetics at lower temperatures in comparison to MgH2. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. (AU) | |
| Processo FAPESP: | 13/05987-8 - Processamento e caracterização de ligas metálicas amorfas, metaestáveis e nano-estruturadas |
| Beneficiário: | Claudio Shyinti Kiminami |
| Linha de fomento: | Auxílio à Pesquisa - Temático |