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HomeMaterials Science ForumMaterials Science Forum Vol. 848Microstructure and Magnetic Properties of...

Microstructure and Magnetic Properties of RE_2.28Fe_13.58B_1.14 Alloys

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Abstract:

The rare-earth (RE) permanent magnets based on Nd₂Fe₁₄B with excellent magnetic properties have been widely used in industrial applications. In this work, the crystal structure, microstructure and magnetic properties of Nd₂_.28Fe_13.58B_1.14, Ce₂_.28Fe_13.58B_1.14 and Pr₂_.28Fe_13.58B_1.14 alloys prepared by arc-melting were investigated. The results show that all alloys are single phase with tetragonal Nd₂Fe₁₄B-type (space group P42/mnm). The Curie temperatures (T_c) of RE_2.28Fe_13.58B_1.14 (RE=Nd, Ce, Pr) alloys are 583 K, 423 K and 557 K, respectively. On the other hand, the coercivities of Nd₂_.28Fe_13.58B_1.14and Pr₂_.28Fe_13.58B_1.14alloys are about 1.05 T and 1.23 T, respectively, while that of Ce₂_.28Fe_13.58B_1.14alloy is only about 0.25 T due to the poor squareness of hysteresis loop. Meanwhile, the saturation magnetizations of Nd_2.28Fe_13.58B_1.14 and Pr_2.28Fe_13.58B_1.14 alloys are about 135 emu/g and 113 emu/g, respectively, while that of Ce_2.28Fe_13.58B_1.14 alloy is about 97 emu/g. It was indicated that the Curie temperatures and magnetic properties of RE₂_.28Fe_13.58B_1.14alloys with the same crystal structure are dependent on light rare earth elements.

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Materials Science Forum (Volume 848)

Pages:

709-714

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.848.709

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Online since:

March 2016

Authors:

Gang Fu, Jiang Wang*, Mao Hua Rong, Guang Hui Rao, Huai Ying Zhou

Keywords:

Curie Temperature, Nd-Fe-B, Permanent Magnets

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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