Author: B. Bendjemil, U. Ramdan and A. Hafs, B. Bendjemil, N. Segeri and S. Habes, D. Vrel, J . Bugdira

Institute: LEREC Laboratory, Department of Physics, Faculty of Sciences, Badji-Mokhtar Annaba University, BP 12, Annaba, 23000, Algeria, Faculty of Sciences and Engineering, Faculty of Mechanical Engineering, University of Guelma, BP 401, Guelma, 24000, Algeria, Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions, UPR CNRS 1311-Université Paris Nord Institut Galilée, 99 Av. Jean-Bapiste Clément, Villetaneuse, 93430, France, Laboratoire de Physique des Milieux Ionisés et Applications, Equipe de Plasma Réactif et Couches Minces, UMR CNRS 7040, Faculté des Sciences, UHP Nancy I, BP 239, Vandoeuvre-lés-Nancy, Cedex , 54046, France

Polycrystalline quasicrystals of icosahedral Al70Cu20Fe10(i-Al70Cu20Fe10) were prepared by thermal explosion (TE) of a mechanically activated mixture of Al, Cu, Fe powders doped with AlCu. The effect of AlCu dopant was studied by X-ray diffraction, scanning electron emission (FESEM), optical microscopy (OM), atomic emission spectroscopy (AES) and energy dispersive X-ray microanalysis (EDX). The synthesized i-Al70Cu20Fe10 and intermetals (Al3Fe, Al2Cu) exhibit soft ferromagnetic and paramagnetic properties, respectively.

Initially, we conducted a detailed study of the magnetic properties of the quasicrystalline al70cu20fe10 alloy without any alloying elements. The results obtained showed that the alloy has weak magnetic susceptibility and a low magnetic permeability coefficient. We then decided to change the composition of the alloy by adding the elements Al and Cu in certain proportions. The alloying process was carefully controlled to ensure an even distribution of elements throughout the alloy structure.

After adding alloying elements, we repeated the measurements of the magnetic properties of the alloy and found a significant improvement. The magnetic permeability coefficient increased several times, indicating a stronger magnetic susceptibility of the alloy. Moreover, we also found that the alloy became magnetic at normal room temperature.

Based on these results, it can be assumed that alloying Al and Cu in the al70cu20fe10 alloy leads to the appearance of ferromagnetic properties. Further studies should be carried out to better understand the mechanism underlying this improvement in magnetic properties.

However, despite the positive changes brought about by alloying Al and Cu, it should be noted that additional research should also be carried out to determine the optimal proportion of these elements. It is possible that changes in their ratio can lead to additional improvements or, conversely, worsen the magnetic properties of the alloy.

The results of the study indicate the importance of Al and Cu alloying in the quasicrystalline al70cu20fe10 alloy to improve its magnetic properties. This work can serve as a basis for further research in the field of alloys and their applications in various technical fields.

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