Enchancement of coercivity in high remanence HDDR Nd-Fe-B powders

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)

DOI:https://doi.org/10.1109/20.800496· OSTI ID:20000753

Nakamura, H; Kato, K; Book, D; Sugimoto, S; Okada, M; Homma, M

A new type of HDDR (Hydrogenation, Disproportionation, Desorption, Recombination) processing route, in which alloys are heated up under a low pressure of H{sub 2} for the disproportionation stage, was found to be an effective way of obtaining high remanence Nd-Fe-B ternary powders, with no large decrease in coercivity (which was the problem with the previous HDDR processing route, in which the alloys were heated under vacuum). The alloys with 0.5% Ga addition exhibited high coercivities of 1.0 MAm{sup {minus}1} with no degradation in remanence (B{sub r} = 1.4 T).

• Research Organization: Tohoku Univ., Sendai (JP)
• OSTI ID: 20000753
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers) Journal Issue: 5Pt2 Vol. 35; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORON ALLOYS
COERCIVE FORCE
FABRICATION
GALLIUM ADDITIONS
IRON BASE ALLOYS
METALLURGICAL EFFECTS
NEODYMIUM ALLOYS