Magnetic properties and structure of Nd-Fe-B melt-spun alloys for isotropic bonded magnets

• Published in: Functional Materials
• Date: 2006
• Main Authors: Avramenko, B.A., Bovda, O.M., Bovda, V.O., Chernov, E.A., Kostin, A.A., Kutniy, D.V., Ravlik, A.G., Onischenko, L.V., Tortika, O.S.
• Format: Article
• Language: English
• Published: НТК «Інститут монокристалів» НАН України 2006
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/135021
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Magnetic properties and structure of Nd-Fe-B melt-spun alloys for isotropic bonded magnets / B.A. Avramenko, O.M. Bovda, V.O. Bovda, E.A. Chernov, A.A. Kostin, D.V. Kutniy, A.G. Ravlik, L.V. Onischenko, O.S.Tortika // Functional Materials. — 2006. — Т. 13, № 3. — С. 478-483. — Бібліогр.: 11 назв. — англ.

The phase evolution and magnetic properties of both melt-spun NdₓFe₉₈.₉₋ₓB₁.₁ x = 10-39 mass % ribbons and isotropic bonded magnets have been investigated. A high coercivity and remanence has been shown to be attainable even in the as-spun state with Nd in the range of x = 28-30 mass % without heat treatment. The influence of heat treatment in the 530 to 730° C range on magnetic properties of melt-spun ribbons has been studied. A well-expressed effect of Nd concentration on the lattice volume of Nd₂Fe₁₄B (P4₂/mnm) phase and volume fraction of secondary phases has been revealed. It was shown that exchange-coupling effect plays important role in the hard magnetic properties of the alloys with low Nd content, but melt-spun alloys with high remanence along are not sufficient to guarantee high magnetic performance.