Standard enthalpies of formation of yttrium gallides by high temperature reaction calorimetry

Mg0.9M0.1Ni (M=Ni, Ti, Zr, Co or Si) ternary alloys were prepared by mechanical alloying (MA). The XRD result showed that all ternary alloys were of amorphous structure, with a trace of substitution elements, except for Co. Electrochemical characteristics of all ternary alloys were studied which were compared to MA amorphous MgNi alloy. Experimental results showed that the ternary alloys had a large discharge capacity at room temperature but lower than that of the MA MgNi alloy. Partially substituting Mg with Ni, Ti, Co, Si could lead to the improvement of cyclic stability and high rate discharge capability. Over all, amorphous Mg0.9Ti0.1Ni showed the best synthesis properties.