Effect of composition on the magnetic properties of (Ce sub 1 minus x Nd sub x ) sub 13. 5 (Fe sub 1 minus y minus z Co sub y Si sub z ) sub 80 B sub 6. 5 sintered magnets

Journal Article · Mon Apr 15 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.347985· OSTI ID:5592288

Li, D; Bogatin, Y ^[1]

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1. SPS Technologies, Jenkintown, Pennsylvania 19046 (US)

The influences of varying cerium, neodymium, cobalt, and silicon concentrations on the magnetic properties of Ce-Fe-B type magnets were investigated. The results indicated that magnets containing 13.5 at.% of cerium exhibits superior magnetic properties to those exhibited by magnets with higher rare-earth element compositions. High-temperature annealing of the cast alloy containing 13.5 at.% cerium at 1010 {degree}C for 120 min results in the elimination of the {alpha}-Fe phase. Increasing the cobalt concentration from 0 to 17 at.% raises the Curie point from 174 {degree}C to 324 {degree}C. The addition of 1 at.% of silicon to the alloy improves intrinsic coercivity by up to 100%. The substitution of up to 5.4 at.% of cerium by neodymium increases magnetic properties of sintered magnets with a 13.5 at.% total rare-earth content. Neodymium contents exceeding 5.4 at.% decrease coercivity. The highest maximum energy product of 27.2 MGOe was exhibited by magnets with a composition of Ce{sub 8.1}Nd{sub 5.4}Fe{sub 62}Co{sub 17}SiB{sub 6.5}.

• OSTI ID: 5592288
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANNEALING
BORIDES
BORON COMPOUNDS
CERIUM BORIDES
CERIUM COMPOUNDS
COBALT BORIDES
COBALT COMPOUNDS
COHERENT SCATTERING
CURIE POINT
DIFFRACTION
FABRICATION
HEAT TREATMENTS
IRON BORIDES
IRON COMPOUNDS
MAGNETIC PROPERTIES
MAGNETS
NEODYMIUM BORIDES
NEODYMIUM COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
RARE EARTH COMPOUNDS
SCATTERING
SILICON BORIDES
SILICON COMPOUNDS
SINTERING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION