Influence of alloying elements Zr, Nb and Mo on the microstructure and magnetic properties of sintered Pr-Fe-Co-B based permanent magnets
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2018
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Materials Science Forum
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The addition of alloying elements on rare-earth permanent magnets is one of the methods
used to improve the magnetic properties. This present work evaluates the influence of alloying
elements such as Zr, Nb and Mo on the microstructure and magnetic properties of sintered Pr-FeCo-
B based permanent magnets. The permanent magnets were produced by the conventional powder
metallurgy route using powder obtained by hydrogen-decrepitation (HD) method from as cast
alloys. In order to produce the magnet Pr16Fe66,9Co10,7B5,7Cu0,7 without alloying elements the
mixture of alloys method was employed, mixing two compositions: Pr20Fe73B5Cu2 (33% w.t) and
Pr14Fe64Co16B6 (67% w.t). With the purpose of evaluating the influence of the alloying elements,
the Pr14Fe64Co16B6X0,1 (where X= Zr, Nb or Mo) (67% w.t) alloy was employed. The
characterization of the alloys and the magnets was carried out using scanning electron microscopy
(SEM), energy-dispersive X-ray spectroscopy (EDXS) and the magnetic properties were measured
using a permeameter. The magnet without any additions presented the highest intrinsic coercivity
(0iHc = 748 KA.m-1) while the magnet with Nb addition presented higher remanence (Br =
1,04 T). The magnet with Zr addition presented the highest maximum energy product (BHmáx =
144 KJ.m-3), and the magnet with Mo addition showed the highest squareness factor (SF = 0,73).
Como referenciar
SILVA, M.R.M.; FIM, R.G.T.; SILVA, S.C.; CASINI, J.C.S.; WENDHAUSEN, P.A.P.; TAKIISHI, H. Influence of alloying elements Zr, Nb and Mo on the microstructure and magnetic properties of sintered Pr-Fe-Co-B based permanent magnets. Materials Science Forum, v. 930, p. 440-444, 2018. DOI: 10.4028/www.scientific.net/MSF.930.440. Disponível em: http://repositorio.ipen.br/handle/123456789/30121. Acesso em: 27 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.