Synthesis of Mg2Ni nanostructured by MASHS technique

Adrian, Isabel Cristina Atias; Ortigoza-Villalba, G.A.; Deorsola, Fabio Alessandro; DeBenedetti, Bruno

doi:10.1016/j.jallcom.2007.11.079

Cited by 11 publications

(3 citation statements)

References 16 publications

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“…Iron (Alfa Aesar, < 10 µm, 99.5 assay) and titanium (William Rolland, 99.3% assay, < 180µm) were added as dopant elements. The optimization of some process parameters (milling time, Mg/Ni ratio and SHS reaction time) in the MASHS technique for producing pure Mg 2 Ni intermetallic have been published in a previous work [32]. By employing the same experimental route, Fe-and Ti-doped Mg 2 Ni alloys were produced.…”

Section: Methodsmentioning

confidence: 99%

Hydrogen Absorption/Desorption in Nanostructured Fe- and Ti-Doped Mg<sub>2</sub>Ni Alloys

Adrian

Deorsola

Ortigoza-Villalba

et al. 2010

DDF

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Nanostructured Mg2Ni, Fe-doped and Ti-doped Mg2Ni alloys for hydrogen storage applications have been produced by means of Mechanically Activated Self-propagating High temperature Synthesis (MASHS). Different molar compositions of Fe and Ti (0.1; 0.3 and 0.5) have been studied in order to determine their influence in the hydrogen sorption properties. Different Mg-Ni based alloys have been tested in order to study their hydrogen sorption behavior. The hydrogenation was carried out in a Pressflow Gas Controller. Subsequently, the dehydrogenation process was conducted by means of a Differential Scanning Calorimetry (DSC) equipped with an H2 detector of the purged gas. The MASHS method has been demonstrated to be effective for the obtainment of nanostructured pure and doped Mg2Ni intermetallics. In addition, the materials produced showed hydrogen storage capacities superior to 4wt%, especially in the case of Fe-doped Mg2Ni and a slight reduction of desorption temperature was reached with Ti-doped Mg2Ni. Finally, the activation energy of the dehydrogenation process was evaluated and Ti-doped sample exhibited the lower activation energy value. Obtained results are promising for technological applications of Mg-based alloys.

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Section: Methodsmentioning

confidence: 99%

Hydrogen Absorption/Desorption in Nanostructured Fe- and Ti-Doped Mg<sub>2</sub>Ni Alloys

Adrian

Deorsola

Ortigoza-Villalba

et al. 2010

DDF

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“…By adding KNO 3 (20 wt.%) to the Fe-Si system, stable combustion was provided and iron silicides with a fine-grain microstructure were obtained [64]. Combustion of the 4B + C [65], Fe + Al [66], and 2Mg + Ni [67] compositions was additionally activated by passing electric current through the sample subjected to preliminary mechanical activation. The activating effect of electric current is not restricted to the Joule heating of the entire sample; most probably, constant or pulsed current generates spark and arc microdischarges at places of contact of the reactive mixture particles.…”

Section: Mechanically Activated Compositionsmentioning

confidence: 99%

“…This phenomenon formed the basis of the method of plasmaspark activation combined with mechanical activation, which was used, in particular, to obtain the TiC-TiB 2 cermet [68] and dense nanocrystalline MoSi 2 [69] in the burning regime. In some publications, these methods of activation are additionally combined with a mechanical action on condensed combustion products of hot pressing [66][67][68] or extrusion [70].…”

Section: Mechanically Activated Compositionsmentioning

confidence: 99%