The effect of Laves phase on the magnetic properties of Fe-Co-Nd-B alloys

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

DOI:https://doi.org/10.1063/1.347988· OSTI ID:5564886

Yang, C J; Choi, S D; Lee, W Y ^[1]

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1. Electromagnetic Materials Laboratories, Research Institute of Industrial Science and Technology, P.O. Box 135, Pohang 790-330, Korea (KR)

The formation of a Laves phase, Nd(Fe,Co){sub 2}, in Nd(Fe{sub 0.92{minus}{ital x}}Co{sub {ital x}}B{sub 0.08}){sub 5.5} magnets prepared by powder metallurgical processing of melt-spun powders has been confirmed. The Laves phase forms after crystallization in melt-spun alloys when {ital x} is larger than 0.17, and is likely to occupy 15 vol % of the sintered magnet when the Co content {ital x} is 0.22. Two-phase'' magnets of Fe{sub 77}Nd{sub 16}B{sub 7}+(5--20 wt. %) NdFe{sub 2} were prepared by rapid solidification and powder metallurgy. As the volume fraction of rapidly solidified Laves phase NdFe{sub 2} (actually a mixture of NdFe{sub 7} compound plus Nd-rich phase) increased, the magnetic properties, particularly for coercivity, were found to decrease.

• OSTI ID: 5564886
• 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
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
BORON ALLOYS
COBALT ALLOYS
COHERENT SCATTERING
DIFFRACTION
FABRICATION
IRON ALLOYS
LAVES PHASES
MAGNETIC PROPERTIES
MAGNETS
METALLURGY
NEODYMIUM ALLOYS
PHYSICAL PROPERTIES
POWDER METALLURGY
RARE EARTH ALLOYS
SCATTERING
SINTERING
X-RAY DIFFRACTION