Effect of composition on the magnetic properties of (Ce1−xNdx)13.5 (Fe1−y−zCoySiz)80B6.5 sintered magnets

Li, D.; Bogatin, Ya. G.

doi:10.1063/1.347985

Cited by 51 publications

(11 citation statements)

References 3 publications

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“…Moreover, the second Curie temperature is almost the same with that of the SP magnet. It is well known that increasing the cerium content results in reduction of the Curie temperature 19 , and hence these three kinds of matrix phases may correspond to the (Pr/Nd) 31 (Fe,TM) 68 B 1 , (Pr/ Nd 0.8 Ce 0.2 ) 31 (Fe,TM) 68 B 1 and (Pr/Nd 0.5 Ce 0.5 ) 31 (Fe,TM) 68 B 1 grains. Figure 2 depicts backscattered SEM images of the as-sintered magnets.…”

Section: Resultsmentioning

confidence: 99%

Mechanism of the enhanced coercivity for the dual-main-phase Ce–Fe–B magnet

Han

Chen

Zhou

et al. 2020

Sci Rep

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The high coercivity of Nd–Fe–B magnets can also be obtained in the Ce–Fe–B magnets fabricated via the dual-main-phase (DMP) method in which the high abundance Ce was used to substitute Nd(Pr). The inhomogeneous distributions of the matrix grains in the DMP magnet play a key role in the enhanced magnetic performance. Compared with the single-phase magnet, more grain boundary phases encapsulating the matrix 2:14:1 grain are formed in the DMP magnet, which reduce the exchange coupling between adjacent magnetic grains. The switching field distribution and the interaction field distribution of the Ce–Fe–B magnets were determined by the first-order-reversal curves (FORC). The switching field peaks around 6 kOe, 11 kOe and 12 kOe in the FORC distribution indicate that three major reversal components coexist for the DMP magnet. The overlapp of the second and third switching field peaks reveals the presence of a pinning interaction within individual magnetic grains with a core–shell structure, which further improve the coercivity of the magnet.

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Section: Resultsmentioning

confidence: 99%

Mechanism of the enhanced coercivity for the dual-main-phase Ce–Fe–B magnet

Han

Chen

Zhou

et al. 2020

Sci Rep

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“…According to the report, it is feasible to solve this problem by replacing Nd and/or Pr with the more abundant and cheaper rare-earth element Ce or La [8], [9]. It reports that Ce2Fe14B phase is more stable than La2Fe14B phase [10]. In addition, cerium can form Ce2Fe14B type anisotropic crystal structure with Fe, B element.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties and Microstructure of Melt-Spun Ce–Fe–B Magnets

et al. 2015

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A series of CexFebalB6 (x=12, 14, 17, 19, 23wt%) ternary ribbons was prepared by melt-spinning. Magnetic properties and microstructure of the Ce-Fe-B ribbons with different Ce content were investigated. XRD results indicated that multiphase coexisted in the as-spun Ce-Fe-B ribbons, which contained Ce2Fe17, CeFe2, Ce-rich phase, Fe-rich phase, cerium oxide and iron oxide. The magnetic properties, microstructure and phase composition of the ribbons were directly affected by the cerium content. The magnetic properties could be obtained by exchange coupling between the hard and soft magnetic phases in the pure ternary Ce-Fe-B ribbons. Furthermore by heat-treatment the magnetic properties of the as-spun Ce-Fe-B ribbons could be optimized. The highest magnetic properties of Hcj=6.2 kOe, Br=6.9 kGs and (BH)m=8.6 MGOe were obtained in Ce17FebalB6 magnets.

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“…There are many economical and technological advantages for the partial substitution of Ce for Nd. Most strikingly, this type of replacement of critical RE elements with cheaper element Ce can reduce the production cost of magnets and is useful for the balanced utilization of rare earth resources though the magnetic properties and Curie temperature decreased slightly [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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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Effect of composition on the magnetic properties of (Ce1−xNdx)13.5 (Fe1−y−zCoySiz)80B6.5 sintered magnets

Cited by 51 publications

References 3 publications

Mechanism of the enhanced coercivity for the dual-main-phase Ce–Fe–B magnet

Mechanism of the enhanced coercivity for the dual-main-phase Ce–Fe–B magnet

Magnetic Properties and Microstructure of Melt-Spun Ce–Fe–B Magnets

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

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