Influence of Synthesis Parameters of FeNi3 Alloy Nanoparticles Obtained by Chemical Reduction Method in Aqueous Solution

Abstract

This paper reports the synthesis of FeNi3 alloy nanoparticles by chemical reduction of the Fe2+ and Ni2+ ions, from the corresponding chlorides, with hydrazine (N2H4�H2O) as a reducing agent in aqueous solution at room temperature by modifying the molar ratio of the ions Fe2+: Ni2+, reaction time, with and without amine-type growth promoter, and reducing both, with or without ultrasonic aid. The FeNi3 alloy nanoparticles have been investigated by XRD, EDS spectrum analysis, SEM and VSM. When the molar ratio of Fe2+ and Ni2+ is equal to 1:3, reducing both, with or without ultrasonic aid, Fe2+ and Ni2+ were completely reduced into Fe and Ni, resulting FeNi3 alloy with a face-centered cubic (fcc) crystal structure. EDS analysis supported the presence of metal ions in atomic weight corresponding to the stoichiometric ratio of initial reaction. SEM analysis showed that nanoparticles of FeNi3 alloy have a spherical structural morphology. Hysteresis loop show a ferromagnetic behaviour of the FeNi3 alloy nanoparticles at room temperature.

Iron-Nickel Alloy with Starfish-like Shape and Its Unique Magnetic Properties: Effect of Reaction Volume and Metal Concentration on the Synthesized Alloy

“…Iron-nickel alloy is an example of bimetallic nanostructures magnetic alloy, which received intensive and significant attention in recent years due to its desirable superior ferromagnetic and mechanical characteristics that make it applicable in many fields [23][24][25]. Fe x Ni 1−x alloy with x being in the range of 20-50% molar ratio is called Permalloy, known for its soft magnetization, and widely used for magnetic heads and environmental remediation [14].…”

“…Fe x Ni 1−x alloy with x being in the range of 20-50% molar ratio is called Permalloy, known for its soft magnetization, and widely used for magnetic heads and environmental remediation [14]. An attractive feature of Fe-Ni alloy is that it can be prepared with different sizes, shapes, compositions, morphologies, and size distribution depending on the method used for the preparation [23,25,26] and iron-to-nickel composition in alloy [23]. A variety of morphological structures of iron-nickel alloy have been prepared including spherical particles [27], triangular particles [28], rods [29], wires [23], platelets [30], flower-like [31], and leaf-like particles [32].…”