Magnetic properties of Ga-added die-upset Nd-Fe-B magnets

Conference · Fri Sep 01 04:00:00 EDT 1989 · IEEE (Institute of Electrical and Electronics Engineers) Transactions on Magnetics; (USA)

OSTI ID:5180769

Endoh, M; Tokunaga, M ^[1]; Boltich, E B; Wallace, W E ^[2]

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1. Magnetic and Electronic Materials Research Lab., Hitachi Metals Ltd., Kumagaya, Saitama (JP)
2. Carnegie-Mellon Univ., Pittsburgh, PA (USA). Dept. of Metallurgical Engineering and Materials Science

The authors describe the magnetic properties of Ga-added die-upset Nd-Fe-B magnet measured between 4.2 and 473 {Kappa}. The die-upset magnets show larger stepwise decrease in the demagnetization curve than the sintered magnet below the spin reorientation temperature, because of the low alignment of grains in the die-upset magnets. In the temperature range above room temperature, the high coercivity Ga-added die-upset magnet has excellent properties compared with the Ga-free die-upset magnet. The addition of Ga increases the pinning force, resulting in the increase of iHc.

• OSTI ID: 5180769
• Report Number(s): CONF-890309--
• Conference Information: Journal Name: IEEE (Institute of Electrical and Electronics Engineers) Transactions on Magnetics; (USA) Journal Volume: 25:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
BORON ALLOYS
CHEMICAL COMPOSITION
COERCIVE FORCE
CRYSTAL STRUCTURE
DISLOCATION PINNING
FABRICATION
GALLIUM ADDITIONS
GALLIUM ALLOYS
GRAIN ORIENTATION
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETS
MATERIALS TESTING
MICROSTRUCTURE
NEODYMIUM ALLOYS
ORIENTATION
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SINTERING
TESTING