Hydrogen induced glass-to-glass transition in Mg-based metallic glasses
The exploration of favourable hydrogen storage materials is of great importance for the realization of a sustainable hydrogen energy society. Metallic glasses exhibit glass-to-glass transitions that may provide a number of opportunities for hydrogen storage.Their chemical compositions can be easily tuned by adding elements to alter their chemical interaction with hydrogen, hence leading to tunable hydrogen storage capacity, kinetics and thermodynamics. Mg-based MGs are of particular interest because of high hydrogen density of up to 7.6 wt% for MgH2. The de-/hydrogenation temperatures of Mg-based MGs, however, are far above their crystallization temperatures. Recently evidence of reversible hydrogenation and dehydrogenation at room temperature of the Mg-Ce-Ni metallic glass have been reported. We developed new Mg based glassy alloys which can store 4 to 5 wt.% of H2 (8 to 10 wt.% D2). To the best of our knowledge, this is the highest hydrogen storage capacity obtained in amorphous alloys to date. The alloys passes interesting hydrogen induced glass-to-glass transition which we want to investigate in detail by the proposed neutron experiment.
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SAKSL KAREL; DURISIN Juraj; FEJERCAK Milos; Henry E. Fischer; P. Jóvári; MICHALIK Stefan; SULIKOVA Michaela; SULOVA Katarina and VARCHOLOVA Dagmara. (2018). Hydrogen induced glass-to-glass transition in Mg-based metallic glasses. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-05-995
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