Preparation of Polymetal Powder Systems Fe–Ni–Co–Al in Aqueous Solutions and Their Physical Characteristics

The possibility of preparation of a polymetallic dispersed Fe–Ni–Co–Al system in aqueous solutions by a redox process between iron(III), nickel(II), cobalt(II) ions and aluminum microparticles in aqueous solutions is shown. In this case, a structure is formed in the aqueous solution, which, from the standpoint of the phase composition, is a mechanical mixture of elemental metals. It has been found that the synthesized Fe–Ni–Co–Al system consists of metallic aluminum particles coated with elemental metals (iron, nickel, and cobalt) with a minimum content of the oxide phase. Additional HF modification of the studied sample of the polymetallic system in low pressure inductive discharge plasma leads to the formation of a number of intermetallic compounds, mainly CoFe (~60%) and FeNi (~15%), and also ensures particle spheroidization. The resulting intermetallic powder composition is potentially suitable for use in additive manufacturing technologies.