The mechanism and kinetics of formation and decomposition of magnesium hydride

The formation and decomposition of magnesium hydride was studied in the temperature range 610–630 K and at pressures from the equilibrium value to 1.6 MPa. The formation of a chemisorbed hydrogen layer on the sample surface seems to be the first important step of the hydriding process. Further hydriding is developed due to nucleation and growth rather than the coating hydride layer growing. We demonstrate that the dehydriding rate can be decreased by treating a sample at p eq ; this phenomenon proves the model proposed.