Microstructure and Magnetic Properties of PrFeCoBNb Sintered Magnets Produced from HD and HDDR Powders
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Published:2008-08
Issue:
Volume:591-593
Page:885-890
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ISSN:1662-9752
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Container-title:Materials Science Forum
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language:
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Short-container-title:MSF
Author:
Ferreira Eliner Affonso1,
Silva S.C.2,
Périgo E.A.3,
de Faria Jr. Rubens Nunes1,
Takiishi Hidetoshi1
Affiliation:
1. IPEN/CNEN, Instituto de Pesquisas Energéticas e Nucleares
2. Instituto de Pesquisas Energéticas e Nucleares IPEN – CNEN/SP
3. Institute for Technological Research
Abstract
Sintered magnets have been produced with powder obtained using the hydrogenation,
disproportionation, desorption and recombination process (HDDR). The new processing procedure
for the production of the sintered magnets has been adopted in an attempt to reduce the milling
time. Commercial cast ingot alloys based on the compositions Pr14Fe75.9Co4B6Nb0.1 and
Pr20.5FebalB5Cu2.0 have been employed in this investigation. The HDDR powder was used to
produce sintered magnets using a mixture of these alloys, in very distinct proportions. Only a small
amount (20 wt. %) of the copper-containing alloy has been added as a sintering aid. Standard
hydrogen decrepitation (HD) magnets have also been included in this work for a comparison. The
effect of a reduced milling time on the magnetic properties of the HDDR sintered magnets has been
investigated. Sintering temperature and time of were kept constant for all magnets (1050°C for 60
minutes). The microstructures of the permanent magnets have been investigated by scanning
electron microscopy and energy dispersive X-ray analysis.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
1 articles.
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