Investigation of hydrogen desorption temperature of MgH2-10wt% (Ti, Mn, V and Fe) nanocomposite produced by mechanical alloying

Subject Areas :

حسین  محمدی ¹ (کارشناس ارشد، مهندسی مواد، دانشگاه صنعتی بابل، بابل، ایران)
سید جمال  حسینی پور ² (دانشیار، گروه مهندسی مواد، دانشگاه صنعتی بابل، بابل، ایران)
محمد  رجبی ³ (دانشگاه صنعتی نوشیروانی بابل)

Received: 2014-10-04 Accepted : 2015-02-04 Published : 2016-11-21

Keywords: Magnesium Hydride, mechanical alloying, Hydrogen Desorption Temperature, Ti-base Additive,

Abstract :

Magnesium hydride is one of the attractive hydrogen storage materials because of its hydrogen storage capacity (7.6 wt %), low cost and light weight. However, high hydrogen desorption temperature and a high reactivity toward oxygen limit the use of MgH2 in practical applications. Many efforts have focused on Mg-based hydrides in recent years to reduce the desorption temperature. These can be accomplished to some extent by changing the microstructure of the hydride by mechanical alloying and also by using proper catalysts. In this work, Ti, Mn, V and Fe elements were added to MgH2 either in the form of powder mixture or prealloyed powder and after 30 h mechanical alloying, the properties of obtained nanocomposites were investigated by X-ray diffractometery, scanning electron microscopy and thermal analysis.  The results showed that the addition of prealloyed powder to MgH2 and 30 h mechanical alloying of powder mixture is more effective in dehydrogenation properties.

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