High coercivity Nd-Fe-B sintered magnet containing vanadium with new microstructure

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/20.104581· OSTI ID:5777147

Sagawa, M ^[1]; Tenaud, P; Vial, A ^[2]; Hiraga, K ^[3]

---

1. Intermetallics Co., Ltd., 22-1 Oiagecho, Mastumuro, Kyoto 615 (JP)
2. Aimants UGIMAG, BP No. 2-38830, St. Pierre d'Allevard (FR)
3. Tohoku Univ., Sendai (Japan). Inst. for Materials Research

It has been found that an addition of a large amount of refractory elements, especially vanadium, in combination with a proper amount of boron is very effective to enhance the coercivity of the sintered Nd-Fe-B permanent magnets. The magnet of Nd{sub 16}Fe{sub 72}V{sub 4}B{sub 8} which has a coercivity as high as 1.38 MA/m consists of three phases, Nd{sub 2}Fe{sub 14}B, Nd-rich phase, and V{sub 2}FeB{sub 2} instead of Nd{sub 1}. {sub 1}Fe{sub 4}B{sub 4} which is contained in the conventional Nd-Fe-B magnets.

• OSTI ID: 5777147
• 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

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALLOYS
BORIDES
BORON COMPOUNDS
CHEMICAL COMPOSITION
COERCIVE FORCE
CRYSTAL STRUCTURE
IRON BORIDES
IRON COMPOUNDS
MAGNETIC PROPERTIES
MAGNETS
MICROSTRUCTURE
NEODYMIUM BORIDES
NEODYMIUM COMPOUNDS
PERMANENT MAGNETS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VANADIUM ADDITIONS
VANADIUM ALLOYS