Abstract
The reaction between magnesium and nickel powders in a KCl-NaCl-MgCl2 ionic melt at 973 K (reaction time, 5 h) has been studied by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray microanalysis, and chemical analysis. According to scanning electron microscopy data, the synthesized Mg2Cu and MgCu2 powders consist of particles ≃ 100 and ≃ 95 nm in size, respectively, in reasonable agreement with the equivalent particle diameters, ≃ 98 and ≃ 87 nm, determined from the specific surface area of the Mg2Cu and MgCu2 powders and with the crystallite sizes evaluated from X-ray diffraction data: D hkl ≃ 90 and 84 nm, respectively. The Mg2Cu synthesized in the ionic melt reacts with hydrogen under milder conditions than do Mg2Cu samples prepared through standard melting of magnesium and copper in an electric arc or vacuum induction furnace.
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