Preparation of Mg2Ni base alloy by the combination of mechanical alloying and heat treatment at low temperature

Comparative evaluation of Mg?Ni hydrogen absorbing materials prepared by mechanical alloying

“…The absorption and desorption PCIs of these compositions reveal that the stoichiometric Mg 2 Ni has less hysterisis (di erence in absorption and desorption plateau pressures) than the other two compositions. The present study on superstoichiometric Mg-Ni system at 330 • C showed single plateau as against the reported two plateaus corresponding to Mg and Mg 2 Ni for both absorption and desorption [8]. The desorption plateaus for Mg 2 Ni and 40 wt% Mg-Ni alloy overlap in their respective hydrogen content range, but 60 wt% Mg-Ni shows the plateau at a lower pressure, possibly because of the presence of free Mg. Hydrogen desorption is nearly complete at above 2 bar pressure for all the compositions at this temperature.…”

“…Mg 2 Ni synthesized by MA (100 h of milling) has been shown to absorb 3:2 wt% at 300 • C at a plateau pressure between 8 and 18 bar [3]. Preparation of Mg 2 Ni using MA and subsequent thermal treatment has been investigated with very long milling (200 h) and thermal treatment times (20 h) [8]. Mg-Ni composites have also been synthesized by MA and their hydrogen absorption properties investigated [9].…”

Hydrogen Absorption Performance of Mechanically Alloyed (Mg<SUB>2</SUB>Ni)<SUB>100&minus;<I>x</I></SUB>Ti<I><SUB>x</SUB></I> Powder

“…Subsequently, the main peak shifted slightly backward the higher energy when the powders were milled after 15 h. This may attribute to the partial crystallization of nickel from the amorphous phase as the powder was treated with a long-time milling. 17) Furthermore, the emergence of the absorption peak at $8336 eV when powder was milled after 5 h implied the formation of amorphous nickel during the MA process, showing a good agreement with the results of the XRD data (Figs. 1).…”

Nanostructured Hydrogen Storage Materials Synthesized by Mechanical Alloying

“…Mechanical alloying is one of main methods used to produce the Mg-Ni alloys which show great expectation as hydrogen storage materials [25,[43][44][45][46]. Subsequently, Ling et al [44] noted that HEBM, which gives rise to the creation of fresh surfaces and cracks, is highly effective for the kinetic improvements in the initial hydriding properties.…”