Preparation and Characterization of MgH2 Mechanocomposites with Mg2NiH0.3 + Mg2NiH4 – δ Two-Phase Mixture

Abstract

The thermal behavior of MgH₂ mechanocomposites with Mg₂NiH_{4 – δ} + Mg₂NiH_0.3 two-phase mixture and phase equilibria in the system Mg–Ni–H involving MgH₂ were studied by powder X-ray diffraction and TG–DSC. The graphic representation of phase equilibria involving MgH₂ and Mg₂NiH_{4 – δ} and Mg₂NiH_x (0 < x < 0.3) solid solutions in the practically important field with high magnesium content area was revised. The possibility of MgH₂ mechanocomposites with Mg₂NiH_{4 – δ} and Mg₂NiHx for use as magnesium intercalating agents and alternative intercalating agents—organomagnesium compounds were considered.