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Studies from University of Sofia Have Provided New Data on Hydrogen (High glass forming ability correlated with microstructure and hydrogen storage...

July 8, 2014



Studies from University of Sofia Have Provided New Data on Hydrogen (High glass forming ability correlated with microstructure and hydrogen storage properties of a Mg-Cu-Ag-Y glass)

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Hydrogen have been published. According to news reporting out of Sofia, Bulgaria, by NewsRx editors, research stated, "Thermal characterization of an as-cast Mg54Cu28Ag7Y11 bulk metallic glass revealed that this alloy exhibits excellent glass forming ability. High-resolution X-ray diffraction study and transmission electron microscopy show that heating and isothermal annealing treatment results in the nucleation of nanocrystals of several phases."

Our news journalists obtained a quote from the research from the University of Sofia, "The average size of these nanocrystals (similar to 15-20 nm) only slightly varies with prolonged annealing, only their volume fraction increases. High-pressure calorimetry experiments indicate that the as-cast fully amorphous alloy exhibits the largest enthalpy of hydrogen desorption, compared to partially and fully crystallized states."

According to the news editors, the research concluded: "Since the fully crystallized alloy does not desorb hydrogen, it is assumed that hydrogen storage capacity correlates only with the crystalline volume fraction of the partially crystallized Mg54Cu28Ag7Y11 BMG and additional parameters (crystalline phase selection, crystallite size, average matrix concentration) do not play a significant role."

For more information on this research see: High glass forming ability correlated with microstructure and hydrogen storage properties of a Mg-Cu-Ag-Y glass. International Journal of Hydrogen Energy, 2014;39(17):9230-9240. International Journal of Hydrogen Energy can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; International Journal of Hydrogen Energy - www.elsevier.com/wps/product/cws_home/485)

Our news journalists report that additional information may be obtained by contacting A. Revesz, Univ Sofia, Dept. of Chem, Sofia 1164, Bulgaria. Additional authors for this research include A. Kis-Toth, L.K. Varga, J.L. Labar and T. Spassov (see also Hydrogen).

Keywords for this news article include: Sofia, Gases, Europe, Bulgaria, Elements, Hydrogen, Nanocrystal, Nanotechnology, Inorganic Chemicals, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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