Desorption Kinetics of Hydrogen in Mg2NiH4 Hydride and in Hydrogeneated Eutectic (Mg/Mg2Ni)Hx

Jiri Cermak; Lubomir Král

doi:10.4028/www.scientific.net/DDF.283-286.639

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Structure and Properties of Grain Boundaries in Submicrocrystalline W Obtained by Severe Plastic Deformation
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Desorption Kinetics of Hydrogen in Mg₂NiH₄ Hydride and in Hydrogeneated Eutectic (Mg/Mg₂Ni)H_x
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Ti Redistribution in Multifilamentary Nb/Cu-Sn Composites
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Hydrogen Absorption in Ion Beam Sputtered Titanium Thin Films
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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vols. 283-286Desorption Kinetics of Hydrogen in Mg2NiH4 Hydride...

Desorption Kinetics of Hydrogen in Mg₂NiH₄ Hydride and in Hydrogeneated Eutectic (Mg/Mg₂Ni)H_x

Abstract:

Mg-Ni alloys are perspective hydrogen-storage materials. In the present work, kinetics of hydrogen desorption was studied in Mg2NiH4 hydride and in hydrogenated eutectic (Mg/Mg2Ni)Hx. Time dependence of desorbed hydrogen was measured in temperature interval 552 –723 K and hydrogen diffusion coefficients were evaluated from obtained desorption curves. Results were interpreted in relation to phase composition investigated parallel by XRD. It was found that microtwinned low-temperature phase LT2 slows-down considerably the hydrogen desorption rate.