The formation of Fe Cu composite based on bimetallic nanoparticles

Abstract

In this paper we suggest a new method of producing a Fe-28 wt% Cu composite by compacting and subsequent sintering of bimetallic nanoparticles made of metals with limited mutual miscibility: iron and copper. The influence of the temperature of annealing on the structure and phase composition of consolidated composite samples has been analyzed. It has been shown that annealing in the temperature range of 200-400 °C induces the processes of low-temperature sintering of copper and iron. These processes are accompanied by the growth of the size of coherent scattering regions and the separation of the metallic components of nanoparticles. During thermal treatment in the range between 400 and 600 °C, adjacent sidewalls of large particles are welded together and large pores emerge in the sample. Further temperature increases cause the sample to shrink and the pores to become smaller. The consolidation of bimetallic nanoparticles consisting of iron and copper and their subsequent sintering allows for obtaining volumetric composites that have homogeneous structure without distinct macroscopic separation of phases as well as high strength characteristics.

Effects of cationic and anionic micelles on the redox reaction of Erythrosine B by H2O2 in presence of Cu‐Fe nanoparticles

“…Energy‐dispersive X‐ray spectroscopy (EDS) studies were performed by using Oxford Instruments (INCA x‐act) (Figure 4). It confirmed the presence of Cu (30.42%), Fe (27.33%) and oxygen (42.25%) in the nanoparticles, while the amount of copper and iron is 1:4 in bulk mole ratio 28,29 . The FT‐IR spectrum and presence of oxygen peak in EDS suggests the formation of CuO‐Fe 2 O 3 by the co‐precipitation method in an alkaline media (Equation 1).…”

“…It confirmed the presence of Cu (30.42%), Fe (27.33%) and oxygen (42.25%) in the nanoparticles, while the amount of copper and iron is 1:4 in bulk mole ratio. 28,29 The FT-IR spectrum and presence of oxygen peak in EDS suggests the formation of CuO-Fe 2 O 3 by the co-precipitation method in an alkaline media (Equation 1). 30,31 TEM images were also recorded in order to determine the shape and size of as-prepared bimetallic NPs (Figure 5), which clearly indicates that the various tinny spherical NPs of other metal was deposited in an irregular manner on the surface of large NPs.…”