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Characterization of a nanocrystalline Mg-Ni alloy processed by high-pressure torsion during hydrogenation and dehydrogenation

Authors/others:Gajdics, Marcell (Eötvös Loránd University Budapest) Calizzi, Marco (Università degli Studi di Bologna) Pasquini, Luca (Università degli Studi di Bologna) Schafler, ErhardRevesz, Adam (Eötvös Loránd University Budapest)
Abstract:Ball-milled Mg-Ni powder has been cold-compacted and subsequently processed by severe shear deformation under high-pressure torsion. The effect of high pressure torsion on morphology and microstructure of the disk-shape samples has been characterized by scanning electron microscopy and X-ray diffraction, respectively. In order to achieve partially hydrogenated and dehydrogenated states of deformed samples, the hydrogen uptake or release was interrupted at 25%, 50% and 75% hydrogen contents in a Sieverts' type apparatus. In this paper we present the characterization of the microstructure during a full absorption-desorption cycle of the nanocrystalline Mg-Ni alloy.
Number of pages:7
Date of publication:22.6.2016
Journal title:International Journal of Hydrogen Energy
Digital Object Identifier (DOI):http://dx.doi.org/10.1016/j.ijhydene.2015.12.224
Publication Type:Article
Research Group Physics of Nanostructured Materials
Faculty of Physics

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