Preparation and properties of anisotropic Nd2Fe14B/α--Fe nanocomposite magnets

Chin J Mater Res

2008, Vol. 22

Issue (6): 619-622 DOI:

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Preparation and properties of anisotropic Nd₂Fe₁₄B/α--Fe nanocomposite magnets

NIU Peili; ZHANG Jiuxin^†; YUE Meng; LI Yongli

The Key Laboratory of Advanced Functional Materials; Ministry of Education;
Beijing University of Technology; Beijing 100022

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NIU Peili; ZHANG Jiuxin; YUE Meng; LI Yongli. Preparation and properties of anisotropic Nd₂Fe₁₄B/α--Fe nanocomposite magnets. Chin J Mater Res, 2008, 22(6): 619-622.

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Abstract

Full dense isotropic and anisotropic Nd₂Fe₁₄B/α--Fe nanocomposite magnets were prepared via sonochemistry method, spark plasma sintering (SPS) and hot deformation method. The effects of α–Fe volume fraction on the structure and magnetic properties of the magnets were investigated. For the isotropic magnets, the exchanging coupling and remanence increase as the α–Fe content increases. For the anisotropic magnets, only the magnets with no more than 2% α–Fe exhibit strong c-axis crystal texture of Nd₂Fe₁₄B phase, and the better magnetic properties are B_r=1.367 T, H_ci=712 kA/m, (BH)_m=327 kJ/m³.

Key words: metallic materials nanocomposite magnets Nd₂Fe₁₄B/α--Fe sonochemistry and spark plasma sintering anisotropy

Received: 25 September 2007

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