The amorphous phase is formed in (Mg1-xAlx)Ni with x = 0-0.2, while the crystalline phase of a CsCl-type cubic structure is formed with x = 0.3-0.5 even in the as-mechanically-alloyed states. The total radial distribution functions for X-ray and neutron diffractions show that deuterium in MgNi, that is, x = 0, occupies the interstitial tetrahedral site composed of nearly 2Mg2Ni. Electrochemical P-C (hydrogen pressure-composition) isotherm measurements revealed that there is an obvious miscibility-gap pressure higher than 10-4 MPa at room temperature even in MgNi, and that the pressure increases by the A1 substitution.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys