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Phase composition, structure and magnetic behaviour of low neodymium Nd-Fe-B permanent magnets

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2007
331.pdf (296.9Kb)
Authors
Žak, Tomas
Talijan, Nadežda M.
Ćosović, Vladan
Grujić, Aleksandar
Article (Published version)
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Abstract
Phase composition, structure and magnetic behaviour of two low neodymium hard magnetic materials differing in way of preparation, centrifugal atomization and melt spinning, were compared using Mössbauer spectroscopy, X-ray diffraction, thermomagnetic analysis and SQUID magnetic measurements. Better hard magnetic characteristics of the melt-spun material are explained on the basis of the differences in content of surface and/or interface Fe(Nd, B) phases. Their remarkable presence in the centrifugally atomized material lowers the content of Fe3B, Fe2B, α-Fe, and Nd2Fe14B phases that are responsible for the magnetic qualities of the material. There are just subtle differences in the phase composition of both materials after thermomagnetic measurement, where the a-Fe phase prevails as a product of thermal decomposition.
Keywords:
nanocomposite permanent magnets / Mössbauer spectroscopy / X-ray diffraction / thermomagnetic curve / SQUID
Source:
Metalurgija, 2007, 13, 1, 53-58
Projects:
  • Dizajniranje nanokristalnih magnetnih materijala tipa (Nd,Pr)FeB i komponenti na bazi smart magnetnih materijala (RS-142035)

ISSN: 0354-6306

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http://cer.ihtm.bg.ac.rs/handle/123456789/333
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