Study on Coercivity Mechanism of the Sintered NdFeB Magnets by Zr Addition

Peng Yue Zhang; Hong Liang Ge; Min Xiang Pan; Qiong Wu; Hang Fu Yang; Zhi Wei Jiao; Jie Gong; Xiao Ling Peng

doi:10.4028/www.scientific.net/AMR.179-180.751

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 179-180Study on Coercivity Mechanism of the Sintered...

Study on Coercivity Mechanism of the Sintered NdFeB Magnets by Zr Addition

Abstract:

The effects of Zr addition on the microstructure and magnetic properties of the sintered NdFeB magnets were investigated by X-ray diffraction (XRD) and BH magnetic tester. The XRD analysis showed that both the Zr-free and Zr-doped samples are composed of main amount of Tetragonal phase Nd2Fe14B (P42/mnm) and trace amount of Nd-rich phase, but adding Zr reduces significantly the values of pole density factor of (004), (006) and (008) crystal faces for the sintered Nd(Fe,Zr)B magnets estimated by Horta-formula. Accordingly, the coercivity of the sample with Zr addition is reduced from 2038 kA/m down to 1951 kA/m. The study of the Kronmüller-plot shows that the nucleation is the dominating mechanism for the magnetization reversal in these two kinds of magnets, and two microstructural parameters of αk and Neff are obtained also.

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Advanced Materials Research (Volumes 179-180)

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751-756

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.179-180.751

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Online since:

January 2011

Authors:

Peng Yue Zhang, Hong Liang Ge, Min Xiang Pan, Qiong Wu, Hang Fu Yang, Zhi Wei Jiao, Jie Gong, Xiao Ling Peng

Keywords:

Coercivity, Nucleation Mechanism, Sintered Magnet

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