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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Effects of equal-channel angular pressing and accumulative roll-bonding on hydrogen storage properties of a commercial ZK60 magnesium alloy

Texto completo
Autor(es):
Asselli, A. A. C. [1, 2] ; Leiva, D. R. [1] ; Huot, J. [2] ; Kawasaki, M. [3, 4, 5] ; Langdon, T. G. [3, 4, 6] ; Botta, W. J. [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Quebec Trois Rivieres, Inst Rech Hydrogene, Trois Rivieres, PQ G9A 5H7 - Canada
[3] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 - USA
[4] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 - USA
[5] Hanyang Univ, Div Mat Sci & Engn, Coll Engn, Seoul 133791 - South Korea
[6] Univ Southampton, Fac Engn & Environm, Mat Res Grp, Southampton SO17 1BJ, Hants - England
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 40, n. 47, SI, p. 16971-16976, DEC 21 2015.
Citações Web of Science: 14
Resumo

The hydrogen storage properties of a commercial ZK60 magnesium alloy were investigated after processing by equal-channel angular pressing (ECAP) and accumulative roll-bonding (ARB). Samples were prepared by 6 passes of ECAP and subsequently rolled 25 times. Microstructural characterization was performed using scanning and transmission electron microscopy. The kinetics of hydrogen absorption and desorption were measured in a Sievert-type apparatus. Processing only by ECAP resulted in a very low hydrogen storage capacity of 0.5 wt. %. Additional processing by ARB refined the microstructure and improved the hydrogen absorption. Despite this improvement, the hydrogen capacity was limited to less than 4 wt. %. This limitation was overcome by crushing the materials into small thin plates. The crushed sample from the ECAP material absorbed 4.77 wt. % of hydrogen in 24 h while the capacity of the sample processed by ECAP and ARB was 6.4 wt. %. The results are discussed in terms of morphology and microstructure of the samples. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 05/59594-0 - Propriedades de ligas metálicas amorfas, metaestáveis e nano-estruturadas
Beneficiário:Walter José Botta Filho
Linha de fomento: Auxílio à Pesquisa - Temático