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Study of microstructure and magnetic properties of optimally annealed R/Q Nd4.5Fe77B18.5 alloy

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2009
559.pdf (531.5Kb)
Authors
Ćosović, Vladan
Talijan, Nadežda M.
Grujić, Aleksandar
Stajić-Trošić, Jasna
Živković, Dragana
Lee, Z.
Radmilović, V.
Article (Published version)
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Abstract
The rapid-quenched (R/Q) and subsequently optimally annealed Nd-Fe-B alloy with 12 wt% Nd was characterized using the X-Ray diffractometry (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HREM) and superconducting quantum interference device (SQUID) magnetometer. It was found that microstructure of the investigated alloy mainly consist of Fe3B, Nd2Fe14B phases and minor content of α-Fe phase, with mean crystal grain sizes being below 30 nm. The ferromagnetic exchange coupling between the grains of identified hard and soft magnetic phases has direct influence on the magnetic properties as it is illustrated by SQUID hysteresis loop. Correlation of the measured magnetic properties with results of microstructure analysis indicates that the investigated rapid-quenched Nd-Fe-B alloy has the nanocomposite structure in optimal magnetic state.
Keywords:
nanocomposite Nd-Fe-B alloys / exchange coupling / phase composition / crystal grain size / magnetic properties
Source:
Metalurgija, 2009, 15, 1, 39-44
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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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/561
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