Influence of milling time on magnetic properties and microstructure of sintered Nd-Fe-B based permanent magnets

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2018
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Materials Science Forum
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In this paper, the effect of the grain size on sintered Nd-Fe-B based permanent magnets was investigated. In order, the magnets were produced by different milling times at 200 rpm and then vacuum sintered at 1373 K for 60 minutes followed by cooling outside the furnace. The magnets either produced by lower and higher milling times (30 and 75 minutes) exhibited lower remanence and coercivity, due the inhomogeneous distribution of the grain sizes. The magnet produced by intermediary milling time (45 minutes) exhibited the highest properties among all samples, with remanence of 1.06 T, coercivity of 891.3 KA.m-1, maximum energy product of 211 KJ.m3 and a squareness factor equal 0.92.

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FIM, R.G.T.; SILVA, M.R.M.; SILVA, S.C.; CASINI, J.C.S.; WENDHAUSEN, P.A.P.; TAKIISHI, H. Influence of milling time on magnetic properties and microstructure of sintered Nd-Fe-B based permanent magnets. Materials Science Forum, v. 930, p. 445-448, 2018. DOI: 10.4028/www.scientific.net/MSF.930.445. Disponível em: http://repositorio.ipen.br/handle/123456789/30120. Acesso em: 28 Mar 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.

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