Artículos de revistas
Severely Deformed Zk60 + 2.5% Mm Alloy For Hydrogen Storage Produced By Two Different Processing Routes
Registro en:
International Journal Of Hydrogen Energy. Elsevier Ltd, v. 41, n. 26, p. 11284 - 11292, 2016.
0360-3199
10.1016/j.ijhydene.2016.05.031
2-s2.0-84971619063
Autor
Soyama J.
Floriano R.
Leiva D.R.
Guo Y.
Jorge Junior A.M.
Pereira Da Silva E.
Pinto H.C.
Bolfarini C.
Kiminami C.S.
Botta W.J.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) In this investigation the commercial ZK60 magnesium alloy modified with 2.5 wt.% of mischmetal was processed by melt spinning (MS) and equal-channel angular pressing (ECAP), both followed by extensive cold rolling (CR). The results indicate that MS was effective to produce small grain sizes in the order of 700 nm, while specimens prepared only by ECAP reached about 50 μm. However, melt spun ribbons showed long activation (first hydrogenation) times of more than 30 h in contrast to ECAP, which took about 10 h. In addition, after the activation process, the hydrogen storage capacity of ECAP was poorer than MS (2.5 and 3.3 wt.% of H2, respectively). Additional processing by CR caused further grain refinement and breakage of intermetallic particles, as well as favoring crystallographic texture in the (002) direction. All these features promoted a significant improvement in the hydrogen storage capacity, and in the absorption kinetics of the specimens processed by MS and ECAP. © 2016 Hydrogen Energy Publications LLC. 41 26 11284 11292 2013/05987-8, FAPESP, São Paulo Research Foundation Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)