ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Hydrogen is the promising pollutant-free fuel of the near future. For various hydrogenapplications, suitable storage systems have to be developed. One of the safe ways is the reversiblestorage of hydrogen in the form of light metal (lithium or magnesium) hydrides. MgH2 magnesiumhydride shows very high storage capacity (approx. 7 wt. %), but its problem is high thermodynamicstability. Therefore, high temperature (over 400°C) is necessary for MgH2 to decompose producinghydrogen. The solution of this problem can be the utilization of the complex magnesium hydridescontaining nickel, copper or other transition metals.In this work, the microstructure and hydrogen storage properties of the various magnesium alloys(Mg-Ni, Mg-Zn, Mg-Cu and Mg-Cu-Al) are described. The aim was to find suitable hydrogenstorage system with good storage capacity and sufficient rate of formation and decomposition ofhydrides. Microstructure, chemical and phase composition of the alloys were determined by thelight and scanning electron microscopy, EDS and XRD. Hydrogen saturation was carried out bycathodic polarization in the alkaline solution. Hydrogen content in the material was estimated byXRD from the shift of the diffraction lines of present phases
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.567-568.217.pdf
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