Structure and Magnetic Properties of Ternary Nanosized FeAlSn and CuFeCo Powders Synthesized by Mechanical Milling

Abstract

Ternary Fe72Al26Sn2 and Cu70Fe18Co12 alloys were obtained by mechanical alloying of pure Fe, Al, Sn, Cu and Co powders using a high energy ball mill. X-ray diffraction and electron microscopy supported by magnetic measurements have been applied to follow changes in the microstructure, phase composition and magnetic properties in dependence on milling time. With the increase of milling time all Al and Sn atoms dissolved in the bcc Fe and the final product of the MA process was the nanocrystalline Fe (Al, Sn) solid solution in a metastable state with a large amount of defects and mean crystallite size of 5 nm. However, the obtained crystallite size value is about 10 nm for the ball milled Cu70Fe18Co12 powders. The electron microscope observations show the morphology of powder particles. Magnetic properties of the nanocrystalline mechanically alloyed FeAlSn and CuFeCo were also investigated and were related to the microstructural changes.

Effects of Minor Elements Additions to the Nanocrystalline FeAl Alloy Produced by Powder Metallurgy

“…This suggests that a Fe (Al,Sn) solid solution is formed by replacement of the separate Fe, Al and Sn phases. The peaks relating to the Fe (Al, Sn) solid solution have replaced those of iron peaks [19,20]. Peak broadening is due to grain refinement, as seen from table 1; the crystallite size in the case of Fe72Al26Sn2 reduces to 6nm.…”

X-Band Electromagnetic Characterization of Fe₇₂Al₂₃V₅ Based Nanocomposites

“…2.b), which form aggregates of a few micrometers [7]. Similar effects of reduction of particles size and agglomeration were observed for mechanically alloyed FeAlSn [8]. ′′ decreases from a larger value of 11.6293 to reach a minimum value of 0.2789 corresponding to a frequency of 9.914 GHz for the 30h milling MA Fe72Al23V5 while it just increases from 1.9559 to 5.9947 for the 15h milling MAFe72Al23V5 one.…”

“…This leads to enhance the magnetic tangent tan𝛿𝛿 𝑀𝑀 spectra. In the low side of [8][9][10] GHz tan𝛿𝛿 𝑀𝑀 for both the samples are larger values which indicate significant magnetic losses.…”

Structural Characterization of Cu10Mo Alloy Synthesized by Mechanical Alloying

“…However, its mechanical strength can be improved by adding alloying elements by means of Mechanical Alloying (MA) and powder metallurgy [2][3][4][5].In this work we report the results of the Cu10Mo alloy, synthesized during 10 h by MA. The microstructural characterization was carried out by X-Ray Diffraction to identify the phases formed after MA process, the crystals size was determined by Rietveld method using the MAUD software [6].…”

“…Copper and its alloys have good electrical and thermal conductivity as well as good resistance to corrosion [1] but it has a low mechanical strength. However, its mechanical strength can be improved by adding alloying elements by means of Mechanical Alloying (MA) and powder metallurgy [2][3][4][5].…”