Effects of magnesium hydriding and magnesium-nickel eutectic reaction on hydriding combustion synthesis of Mg₃Ni

The effects of the holding times of magnesium hydriding reaction and the synthesis temperatures on the hydriding combustion synthesis (HCS) of Mg₂Ni were studied by means of X-ray diffraction, scanning electron microscopy and hydriding kinetic measurement. The results show that the hydrogen storage capacity of Mg₃Ni increases obviously with the increasing synthesis temperature (the hydrogen storage capacity of the sample reaches 3.36wt% at synthesis temperature of 850 K). The influences of holding time during magnesium hydriding reaction vary with the different synthesis temperatures.