A new method for the preparation of anisotropic Nd-Fe-B-based magnets
- 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-; ISSN 0018-9464; TRN: IM9805%%115
- Journal Information:
- IEEE Transactions on Magnetics, Vol. 33, Issue 5Pt2; Conference: 1997 IEEE international magnetics conference (Intermag `97), New Orleans, LA (United States), 1-4 Apr 1997; Other Information: PBD: Sep 1997
- Country of Publication:
- United States
- Language:
- English
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