Hydrogen sorption properties of an Mg–Ti–V–Fe nanocomposite obtained by mechanical alloying

Application of controlled and electrical discharge assisted mechanical alloying for the synthesis of nanocrystalline MgB2 superconducting compound

“…However, Huot et al in another publication [14] gave slightly different interpretation suggesting that MgO originated from the oxide film present on the as-received Mg particles due to the low reduction potential of Mg as well as from reaction of Mg with oxides from the vial and balls to form MgO. Khrussanova et al [15] argued that MgO formed in their Mg-Ti, Mg-V and Mg-Fe mechanically alloyed powders as a result of oxidation by exposure of milled powders to atmospheric oxygen or by negligible amounts of oxygen present in pure hydrogen upon hydriding.…”

“…The presence of MgO is not unusual in the powders based on Mg which were mechanically alloyed for prolonged durations although the mechanism of the formation of MgO is not quite clear [13][14][15]. Huot et al [13] interpreted the presence of MgO in their mechanically alloyed Mg-Fe and Mg-Co alloys as arising from the high reactivity of very fine milled powder due to its exposure to air during XRD measurements, i.e.…”

Hydrogenation of CeNi: hydride formation, structure and magnetic properties

“…However, the use of pure magnesium is prevented by its very poor hydrogen absorption and desorption kinetics. For that reason, a large number of investigations have been aimed at improving the kinetic characteristics of hydriding and dehydriding of magnesium by preparing composites on its basis with an absorption capacity close to that of pure Mg. A survey of the literature on this subject is given in some recent papers of the authors [1][2][3].…”

Controlled mechano-chemical synthesis of nanostructured ternary complex hydride Mg2FeH6 under low-energy impact mode with and without pre-milling

“…However, only a handful of papers have been published on this subject [8][9][10][11][12][13]. In almost all of them the direct, one-step synthesis of Mg 2 FeH 6 , either from the elemental mixture of Mg and Fe powders [9][10][11] or from a mixture of MgH 2 and Fe [8,12,13], has been carried out in either planetary (Fritsch) or vibrational (Spex) ball mills in which the movement of grinding (usually steel) balls is rather chaotic and creates a continuous and erratic change of various modes of milling from shearing to impact during the same milling cycle. The only exception is the study by Gennari et al [11] where they used an older version of the magneto-mill, Uni-Ball-Mill 2, in which the trajectories of the steel balls inside the milling vials can be controlled.…”