Magnetic properties of high-quality melt-spun Nd-Fe-Co-B-C ribbons and their bonded magnets

Melt-spun ribbons of Nd-Fe-Co-B-C system alloys were prepared by the single roller rapid-quenching method. The effects of composition, substrate surface velocity, and heat treatment on the magnetic properties were studied. A maximum energy product of 140.5 kJ/m3 was obtained for Nd11Fe72Co8(B0.5C0.5...

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Bibliographic Details
Published in:Journal of applied physics 1991-11, Vol.70 (10), p.6597-6599
Main Authors: YAMAMOTO, H, YAMAGUCHI, T
Format: Article
Language:English
Subjects:
360104 - Metals & Alloys- Physical Properties
ALLOYS
AMORPHOUS STATE
Applied sciences
BORON ALLOYS
CARBIDES
CARBON COMPOUNDS
CHEMICAL COMPOSITION
COBALT ALLOYS
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
FABRICATION
HEAT TREATMENTS
IRON ALLOYS
MAGNETIC PROPERTIES
Magnetic properties and materials
MAGNETS
MATERIALS SCIENCE
Metals. Metallurgy
NEODYMIUM ALLOYS
PHYSICAL PROPERTIES
Physics
RARE EARTH ALLOYS
Studies of specific magnetic materials
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Summary:Melt-spun ribbons of Nd-Fe-Co-B-C system alloys were prepared by the single roller rapid-quenching method. The effects of composition, substrate surface velocity, and heat treatment on the magnetic properties were studied. A maximum energy product of 140.5 kJ/m3 was obtained for Nd11Fe72Co8(B0.5C0.5)9 alloy ribbon prepared at a substrate surface velocity of 17.1 m/s. The amorphous Nd11Fe72Co8(B0.5C0.5)9 ribbons prepared at a substrate surface velocity of 20.7 m/s were crystallized by heat treatment, and the optimum annealing condition was found to be at 600 °C for 30 min. Then the value of (BH)max was 138.5 kJ/m3. The value of (BH)max for a Nd11Fe72Co8(B0.5C0.5)9 bonded magnet prepared by using the ribbons heated at 600 °C was 90.4 kJ/m3.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.349869