On the oxygen stabilized Nd-rich phase in the Nd-Fe-B (-O) permanent magnet system

Journal Article · Sat Sep 01 00:00:00 EDT 1990 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/20.104826· OSTI ID:5876839

Lemarchand, D; Vigier, P; Labulle, B ^[1]

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1. U.A. 808, Univ. de Rouen, BP 118, 76134 Mont-Saint-Aignan (FR)

In Nd-Fe-B permanent magnets, the cubic Nd- rich phase (a = 0.52 nm) is very important both to the development of coercivity and to sintering mechanism. Transmission electron microscopy shows that this Nd-rich phase is not stable under the electron irradiation. The analysis of the decomposition reaction, leading to the formation of cubic Nd{sub 2}O{sub 3} and NdO, proves that the Nd-rich phase can be classed as a NdO compound which is supersaturated with Oxygen and stabilized with Iron. Taking into account the existence of a liquid miscibility gap in the Nd-Fe-B-O quaternary system, a model is proposed to explain its formation.

• OSTI ID: 5876839
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA) Vol. 26:5; ISSN IEMGA; ISSN 0018-9464
• Country of Publication: United States
• Language: English

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