Effect of Nb doping on the microstructure and magnetic properties of Nd-Ce-Fe-B alloy

Quan, Qichen; Zhang, Lili; Jiang, Qingzheng; Lei, Weikai; Zeng, Qingwen; Hu, Xiulin; Wang, Lei; Yu, Xiaoquan; Du, Junjie; Fu, Gang; Liu, Renhui; Zhong, Minlin; Zhong, Zhenchen

doi:10.1016/j.jmmm.2017.07.017

Cited by 19 publications

(3 citation statements)

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“…If the H c /H cj increases faster than J r /J rmax by increasing the strength of applied magnetic field, the coercivity mechanism is believed to be pinning type. The opposite case indicates the nucleation mechanism [21,22]. The illustration is the minor hysteresis loop for the alloy at x = 0-3.0 at%.…”

Section: Analysis Of Coercivity Mechanismmentioning

confidence: 98%

“…1 that the diffraction peaks mainly consist of two phases: 2:14:1 main phase and α-Fe soft magnetic phase. The peaks of main phase and α-Fe phase become weakened and widened after adding Mo, which indicates that defects or internal stress probably exists or grain size decreases with Mo addition [22]. It is inferred by the XRD patterns that the addition of Mo suppresses the formation of α-Fe phase.…”

Section: Effect Of Mo On the Phase Structurementioning

confidence: 99%

“…The controlled substitution of low melting point elements such as Al, Cu, Ge and Ga has been reported to improve the coercivity of Nd-Fe-B-type alloys [18][19][20]. On the other hand, the high melting point elements such as Hf, Ta, Zr and Nb have also been reported to refine the grains of nanocrystalline magnets and hence improve the magnetic properties [21,22]. It was claimed that Mo element controls the crystallization during rapid solidification leading to grain refinement, uniform microstructure and ultimately improves the magnetic properties of Nd 17 Fe 73 B 7 Ga 1 Mo 2 alloy [23].…”

Section: Introductionmentioning

confidence: 99%

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Uneven Evolution of Microstructure, Magnetic Properties and Coercivity Mechanism of Mo-Substituted Nd–Ce–Fe–B Alloys

Zhang

Song

Rehman

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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The purpose of this paper is to study the influence of Mo addition on the phase morphologies, microstructures and magnetic properties of the designated alloys. It is found out that the coercivity H cj increases unevenly from 12.2 kOe for (Nd 0.8 Ce 0.2 ) 13 Fe 82 B 5 to the maximum value of 13.3 kOe for (Nd 0.8 Ce 0.2 ) 13 Fe 80 B 5 Mo 2 . The transmission electron microscopy images demonstrate that the grain size decreases with the addition of Mo, which indicates that Mo has grain refinement effect. The correlative analysis gives rise to the conclusion that the coercivity mechanism of the investigated alloys is dominated by pinning type. All in all, the enhancement of the magnetic properties is mainly attributed to the synergistic impact of grain refinement, pinning effects and the microstructural homogenization. The research may shed light on the potential development and application of rare earth-based counterpart magnets.

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Section: Analysis Of Coercivity Mechanismmentioning

confidence: 98%

Section: Effect Of Mo On the Phase Structurementioning

confidence: 99%