Magnetic behavior and phase composition of CeDidymium-Fe-B sintered magnets with additions of Si, Co and Dy[sub 2]O[sub 3]

Conference · Mon Nov 01 04:00:00 EST 1993 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6822646

Zhou, S X ^[1]; Hoeier, R ^[2]

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1. Univ. of Trondheim (Norway). Dept. of Physics
2. SINTEF, Trondheim (Norway)

The influences of Si, Co and Dy[sub 2]O[sub 3] on the magnetic properties of CeDidymium-FeB inexpensive sintered magnets were investigated. The CeDidymium (CeDidym) synthesized for this study had the composition of 40Ce-50Nd-10Pr in wt%. Two series of alloys having the composition of CeDidym[sub 16.5]Fe[sub 77[minus]x]Si[sub x]B[sub 6.5] and CeDidym[sub 16.5]Fe[sub 73[minus]y]Co[sub y]Si[sub 4]B[sub 6.5], where 0[le]x[le]8 and 0[le]y[le]30, have been prepared. It is found that the intrinsic coercivity [sub i]H[sub c] and the Curie temperature [Tc] were increased from 5.1 kOe and 261 C for x = 0 to 7.2 kOe and 286 C for x = 8 respectively. The addition of 10 at% of Co causes a substantial increases in [Tc] from 275 C to 350 C. The intrinsic coercivity of the (Si, Co)-containing magnets was further improved by DY203 addition. The magnetic properties of the sintered magnets made from the CeDidym[sub 16.5]Fe[sub 63]Co[sub 10]Si[sub 4]B[sub 6.5] powder blended with 3 weight percent Dy[sub 2]O[sub 3] are B[sub r] = 10.9 kG, [sub i]H[sub c], = 9.2 kOe, (BH)[sub max] = 28.2 MGOe and [Tc] = 350 C.

• OSTI ID: 6822646
• Report Number(s): CONF-930416--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 29:6Pt1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
42 ENGINEERING
420200 -- Engineering-- Facilities
Equipment
& Techniques
ALLOYS
BORON ALLOYS
CERIUM ALLOYS
CHALCOGENIDES
COBALT
CURIE POINT
DATA
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETS
METALLURGICAL EFFECTS
METALS
NEODYMIUM ALLOYS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PERMANENT MAGNETS
PHASE STUDIES
PHYSICAL PROPERTIES
PRASEODYMIUM ALLOYS
RARE EARTH ALLOYS
RARE EARTH COMPOUNDS
SEMIMETALS
SILICON
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE