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Maddah, Mona, Rajabi, Mohammad, Rabiee, Seyed Mahmood. (1393). Hydrogen Desorption Properties of Nanocrystalline MgH2-10 wt.% ZrB2 Composite Prepared by Mechanical Alloying. , 47(1), 21-26. doi: 10.7508/jufgnsm.2014.01.004
Mona Maddah; Mohammad Rajabi; Seyed Mahmood Rabiee. "Hydrogen Desorption Properties of Nanocrystalline MgH2-10 wt.% ZrB2 Composite Prepared by Mechanical Alloying". , 47, 1, 1393, 21-26. doi: 10.7508/jufgnsm.2014.01.004
Maddah, Mona, Rajabi, Mohammad, Rabiee, Seyed Mahmood. (1393). 'Hydrogen Desorption Properties of Nanocrystalline MgH2-10 wt.% ZrB2 Composite Prepared by Mechanical Alloying', , 47(1), pp. 21-26. doi: 10.7508/jufgnsm.2014.01.004
Maddah, Mona, Rajabi, Mohammad, Rabiee, Seyed Mahmood. Hydrogen Desorption Properties of Nanocrystalline MgH2-10 wt.% ZrB2 Composite Prepared by Mechanical Alloying. , 1393; 47(1): 21-26. doi: 10.7508/jufgnsm.2014.01.004

Hydrogen Desorption Properties of Nanocrystalline MgH2-10 wt.% ZrB2 Composite Prepared by Mechanical Alloying

Journal of Ultrafine Grained and Nanostructured Materials
مقاله 4، دوره 47، شماره 1، شهریور 2014، صفحه 21-26    اصل مقاله (631.89 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.7508/jufgnsm.2014.01.004
نویسندگان
Mona Maddah؛ Mohammad Rajabi* ؛ Seyed Mahmood Rabiee
Department of Mechanical Engineering, Babol Noshirvani University of Technology , P.O.Box 47148-71167, Shariati Street, Babol, Iran.
چکیده
Storage of hydrogen is one of the key challenges in developing hydrogen economy. Magnesium hydride (MgH2) is an attractive candidate for solid-state hydrogen storage for on-board applications. In this study,
10 wt.% ZrB2 was co-milled with magnesium hydride at different milling times to produce nanocrystalline composite powder. The effect of milling time and additive on the hydrogen desorption properties of obtained powder was evaluated by thermal analyzer method and compared with pure MgH2. The phase constituents of powder particles were characterized by X-ray diffractometry method. The grain size and lattice strain of β-MgH2 phase were estimated from the broadening of XRD peaks using Williamson–Hall method. The size and morphological changes of powder particles upon mechanical alloying were studied by scanning electron microscopy. XRD analysis showed that the mechanically activated magnesium hydride consisted of β-MgH2, γ-MgH2 and small amount of MgO. It is shown that the addition of ZrB2 to magnesium hydride yields a finer particle size. The thermal analyses results showed that the addition of ZrB2 particle to magnesium hydride and mechanical alloying for 30 h reduced the dehydrogenation temperature of magnesium hydride from 319 °C to 308 °C. This can be attributed to the particle size reduction of magnesium hydride.
کلیدواژه‌ها
Hydrogen desorption؛ magnesium hydride؛ Mechanical alloying؛ Nanocrystalline composite
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