Abnormal variation of magnetic properties with Ce content in (PrNdCe)2Fe14B sintered magnets prepared by dual alloy method

doi:10.1088/1674-1056/25/5/057502

Abstract Resource-saving (PrNdCe)₂Fe₁₄B sintered magnets with nominal composition (PrNd)_15-xCe_xFe₇₇B₈ (x=0-10) were prepared using a dual alloy method by mixing (PrNd)₅Ce₁₀Fe₇₇B₈ with (PrNd)₁₅Fe₇₇B₈ powders. For Ce atomic percent of 1% and 2%, coercivity decreases dramatically. With further increase of Ce atomic percent, the coercivity increases, peaks at 6.38 kOe in (PrNd)₁₁Ce₄Fe₇₇B₈, and then declines gradually. The abnormal dependence of coercivity is likely related to the inhomogeneity of rare earth chemical composition in the intergranular phase, where PrNd concentration is strongly dependent on the additive amount of (PrNd)₅Ce₁₀Fe₇₇B₈ powders. In addition, for Ce atomic percent of 8%, 7%, and 6% the coercivity is higher than that of magnets prepared by the conventional method, which shows the advantage of the dual alloy method in preparing high abundant rare earth magnets.

Keywords: permanent magnets Ce element dual alloy method coercivity

Received: 19 December 2015
Revised: 28 January 2016
Accepted manuscript online:

PACS:	75.50.Vv	(High coercivity materials)
	75.50.Ww	(Permanent magnets)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51461033, 51571126, 51541105, and 11547032), the Natural Science Foundation of Inner Mongolia, China (Grant No. 2013MS0110), and the Inner Mongolia University of Science and Technology Innovation Fund, China.

Corresponding Authors: Zhu-Bai Li
E-mail: lzbgj@163.com

Cite this article:

Xue-Feng Zhang(张雪峰), Jian-Ting Lan(兰剑亭), Zhu-Bai Li(李柱柏), Yan-Li Liu(刘艳丽), Le-Le Zhang(张乐乐), Yong-Feng Li(李永峰), Qian Zhao(赵倩) Abnormal variation of magnetic properties with Ce content in (PrNdCe)₂Fe₁₄B sintered magnets prepared by dual alloy method 2016 Chin. Phys. B 25 057502

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Abnormal variation of magnetic properties with Ce content in (PrNdCe)2Fe14B sintered magnets prepared by dual alloy method

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Abnormal variation of magnetic properties with Ce content in (PrNdCe)₂Fe₁₄B sintered magnets prepared by dual alloy method