Abstract
Three solid-solid and two solid-liquid diffusion couples together with 32 key samples were used to construct the isothermal section of the Mg-Ni-Y system at 673 K. The present investigation revealed 12 ternary intermetallic compounds. Crystal structures of two ternary compounds τ1 (Gd4RhIn prototype with lattice parameter of a = 1.3666 nm) and τ2 (Mo2FeB2 prototype with lattice parameters of a = 0.7395 nm and c = 0.3736 nm) were determined. The phase relations and ternary solubility of the binary and ternary compounds at 673 K were determined using scanning electron microscopy (SEM), wave dispersive X-ray spectrometer (WDS) and X-ray diffraction (XRD) analysis.
Highlights
Mg-based alloys are widely used in structural applications because of their high strength to weight ratio
Some of the promising metallic glasses with large super cooled liquid region have been reported in the Mg-Ni-Y system [1,6]
In addition to structural applications, Mg-Ni-Y alloys have been used for hydrogen storage purpose [7]
Summary
Mg-based alloys are widely used in structural applications because of their high strength to weight ratio. It is found that amorphization increases the hydrogen storage capacity of the crystalline alloys [8,9] due to their short-range order structures and extra free volume. They [11] confirmed the occurrence of two ternary compounds τ3 (MgNi4Y) and τ4 (Mg2Ni9Y). It was decided to investigate the system experimentally in order to have better understanding of the phase equilibria for the whole composition range
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