Title: Permanent magnets Nd-Fe-B

Authors: L.A. Dobrzanski, M. Drak

Addresses: Division of Structural and Special Materials Engineering, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44–100 Gliwice, Poland. ' Division of Structural and Special Materials Engineering, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44–100 Gliwice, Poland

Abstract: Dynamic developments in the engineering and technology fields give reasons to increase the requirements posed to various engineering materials. Hard magnetic materials based on rare earth and transition metal compounds, in particular on the Nd₂Fe₁₄B phase, are materials with big application possibilities. Good magnetic properties of these magnets come from the intrinsic properties of intermetallic phases – remanence and Curie temperature; and properties formed by the structure – coercive force and maximum energy product. The paper presents the material and technological solutions, which make it possible to obtain hard magnetic composite materials from powdered rapid quenched Nd-Fe-B strip bonded by polymer matrix. The complex relationship among the manufacturing technologies of these materials, their microstructure, as well as magnetic, mechanical, physical properties and corrosion resistance were evaluated. The paper also shows the potential applications of these magnetic materials.

Keywords: permanent magnets; Nd-Fe-B; microstructure; mechanical properties; magnetic properties; application; hard magnetic composite materials; rapid quenching; polymer matrix; corrosion resistance; materials properties.

DOI: 10.1504/IJMMP.2007.014281

International Journal of Microstructure and Materials Properties, 2007 Vol.2 No.2, pp.133 - 149

Published online: 30 Jun 2007 *

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