A new method for the preparation of anisotropic Nd-Fe-B-based magnets

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.619582· OSTI ID:566406

Yang, J P; An, K S; Song, C Y; Kwon, M; Jeoung, T S; Yang, S C ^[1]

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1. Mando Machinery Corp., Namyangju, Kyongki (Korea, Republic of). Research and Development Center

A new hot-forming process has been studied to produce anisotropic Nd-Fe-B-based magnets from melt-spun ribbons. The ribbon fragments were inserted in a Cu tube and hot-deformed together with one-stroke. At a height reduction ratio of 0.44, the melt-spun ribbons were densified into a magnet with a density of 7.14 g/cm{sup 3}, and showed a (BH){sub max} of 14.6 MGOe. With further deformation, the magnets were plastically deformed with Cu tubes in the lateral direction, and crystallographic anisotropy was introduced. The magnets with a height reduction ratio of 0.75 exhibited magnetic properties of (BH){sub max} = 32.1 MGOe, B{sub r} = 11.7 kG, and {sub i}H{sub c} = 10.6 kOe. This process shows the possibility that the conventional hot-pressing and subsequent die-upsetting for anisotropic magnets can be simplified into a one-step process.

• OSTI ID: 566406
• Report Number(s): CONF-970468--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 5Pt2 Vol. 33; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORON ALLOYS
HOT WORKING
IRON ALLOYS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
NEODYMIUM ALLOYS
PERMANENT MAGNETS