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Spark plasma sintering of Nd–Fe–B magnetic alloy

Published online by Cambridge University Press:  31 January 2011

Z. G. Liu ,
M. Umemoto ,
S. Hirosawa  and
H. Kanekiyo
Z. G. Liu*
Affiliation:
Department of Production Systems Engineering, Toyohashi University of Technology, 1-1 Tempaku-cho, Toyohashi 441, Japan
M. Umemoto
Affiliation:
Department of Production Systems Engineering, Toyohashi University of Technology, 1-1 Tempaku-cho, Toyohashi 441, Japan
S. Hirosawa
Affiliation:
Sumitomo Special Metals Co. Ltd., 2-15-17 Egawa Shimamoto-cho, Mishima-gun, Osaka 618, Japan
H. Kanekiyo
Affiliation:
Sumitomo Special Metals Co. Ltd., 2-15-17 Egawa Shimamoto-cho, Mishima-gun, Osaka 618, Japan
*
a)Address all correspondence to this author. e-mail: liuzg@umelab-61.tutpse.tut.ac.jp
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Abstract

Spark plasma sintering was used to consolidate the crystallized Nd–Fe–B alloy powders. It was found that a higher sintering temperature can improve the consolidation significantly, whereas it deteriorates the magnetic properties drastically due to the appearance of a large amount of α–Fe phase and the grain growth. Sintering at lower temperature can preserve the magnetic properties better, while the powders cannot be consolidated into a fully dense compact, even under the higher pressure of 75 MPa. Finer starting powder particles show similar behavior.

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Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 6 , June 1999 , pp. 2540 - 2547
Copyright
Copyright © Materials Research Society 1999

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References

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