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Microstructure and Microanalysis Studies of some Lanthanum-Magnesium Based Hydrogen Storage Alloys

Microstructures and chemical compositions of some commercial La-Mg based alloys have been investigated. The hydrogen storage alloys can be represented by the formulae La2Mgx, La2Mgx-1Ni and LaMg2Ni9 (x=12 or 17). The determination of the microstructures and phase compositions of these alloys has been carried out using scanning electron microscopy and energy dispersive X-ray analysis.