Research on Magnetic Property of Nd2Fe14B/α-Fe Nanocomposite Under Different Roller Speeds

Maoyuan Liu1, Lei Chen*, 2
1 College of Science of Tibet University, Lhasa City, Tibet Autonomous Region 850000, China
2 Haibin College of Beijing Jiaotong University, Huanghua City 061100, China

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© 2014 Liu and Chen;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Haibin College of Beijing Jiaotong University, Huanghua City, 061100, China; Tel: +8613821392810; E-mail:


Nano-composite permanent magnetic material is a new type of permanent magnetic material, and it is the synthesis of soft and hard magnetic phase within the nanoscale. On the basis of exchange coupling hard magnetizing theory, nano-composite permanent magnetic material can, at the same time, have high residual magnetization intensity of soft magnetic phase and high coercivity of hard magnetic phase, which can be developed into new generation high performance permanent magnetic material. Nevertheless, magnetic energy of permanent nano-composite magnet derived from experiments differs greatly from the theoretical value, and this is mainly due to fairly great difference between the micro-structure of material and the theoretical model. In this paper, the constituent was taken as (Nd, Pr, Dy)2(Fe, Nb)14B/α-Fe, and the fusant rapid quenching method was adopted to study the impact of different roller speeds on the magnetic property. Moreover, through the result of VSM, XRD and SPM, the magnetic property, phase composition and micro structure of alloy were analyzed.

Keywords: Fusant quick quenching, magnetic property, nano-composite permanent magnetic material.