MgH2→Mg phase transformation driven by a high-energy electron beam: An in situ transmission electron microscopy study

B. Paik, I. P. Jones, A. Walton, V. Mann, D. Book, I. R. Harris

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    24 Citations (Scopus)

    Abstract

    The dynamics of a phase change have been studied using the electron beam in a transmission electron microscope to transform MgH2 into Mg. The study involved selected-area diffraction and electron-energy-loss spectroscopy (EELS). The orientation relation ([001]MgH2//[2̄110] Mg and (1̄10)MgH2//(0001)Mg), obtained from the electron diffraction study, has been used to propose a model for the movements of magnesium atoms during the phase change. The in situ EELS results have been compared with the existing H-desorption model. The study aims to describe the sorption dynamics of hydrogen in MgH2, which is a base material for a number of promising hydrogen storage systems.

    Original languageEnglish
    Pages (from-to)1-7
    Number of pages7
    JournalPhilosophical Magazine Letters
    Volume90
    Issue number1
    DOIs
    Publication statusPublished - 2010 Feb 17

    Keywords

    • EELS
    • Hydrides
    • Hydrogen desorption
    • Magnesium
    • TEM

    ASJC Scopus subject areas

    • Condensed Matter Physics

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