Mechanosynthesis and Characterization of Nanostructured Mn-Al-B Permanent Magnets

Khitouni, Mohamed; Al-Harbi, Adel Mishaal

doi:10.21608/ejchem.2025.433627.12486

Mechanosynthesis and Characterization of Nanostructured Mn-Al-B Permanent Magnets

Document Type : Original Article

Authors

¹ college of Science, Qassim University

² Department of Chemistry, College of Science, Qassim University, Buraydah 51452, Saudi Arabia

10.21608/ejchem.2025.433627.12486

Abstract

In this study, a high-energy ball-milling approach was used to process the mixture of α-Mn, Al, and B powders. Following the initial milling stage, the XRD patterns demonstrate that the Al and B atoms permeated the α-Mn matrix, resulting in the formation of an α-Mn(Al,B) solid solution as a consequence of the mechanical alloying process. With a percentage value of almost 85%, XRD showed that an amorphous phase had formed in favor of the Mn₂AlB₂-type phase when the milling period was increased to 30 h. There is a correlation between these XRD deductions and EDX elemental mapping. Additionally, it was found that the crystallite size decreased to roughly 10 nm and the lattice stresses increased to roughly 1.12% as the milling duration increased. The fine microstructure is associated with the defects' structure, which is characterized by a high dislocation density of around 201016 m-2. The resulting nanometric microstructure, however, can be the result of substantial plastic deformation and the cumulative effects of solid solution. Understanding the microstructural behavior of Mn-Al-B alloys and how to optimize processing parameters to improve their microstructural features are two benefits of this research.

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