Intrinsic Magnetic Properties of Ce2Fe14B Modified by Al, Ni, or Si

Orimoloye, Kayode; Ryan, D. H.; Pinkerton, F. E.; Medraj, Mamoun

doi:10.3390/app8020205

Cited by 13 publications

(3 citation statements)

References 48 publications

(69 reference statements)

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“…This value is observed to be around 5% greater than the 931.1 kA/m reported by Herbst et al [3] for Ce 2 Fe 14 B at 22°C. Such a difference may be due to the contribution of secondary phases such as α-Fe, which is also observed by Kayode et al [17]. The H a of dopant-free Ce 2 Fe 14 B is measured as 28.1 kOe which is 8% higher than the 26.0 kOe value reported in the literature [20][21].…”

Section: Accepted Manuscriptmentioning

confidence: 48%

Intrinsic magnetic properties of Ce2(Fe, Co)14B and its modifications by Ni and Cu

Wang

Medraj

2018

Journal of Alloys and Compounds

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The intrinsic magnetic properties of Ce 2 Fe 14-x Co x B (x≤4.76) are studied at 25°C using key alloys annealed at 900°C for 25 days. The saturation magnetization (M s ) and the Curie temperature (T c ) of Ce 2 Fe 14-x Co x B increase with Co content. However, the anisotropy field (H a ) of Ce 2 Fe 14-x Co x B diminishes precipitously with Co content. The process of crystal structure refinement indicates that the saturation magnetization of Ce 2 Fe 14-x Co x B is related to the site occupancy of Co atoms at different Fe atomic sites.Co atoms prefer to occupy 8j2 site, followed by 16k2, 4e and 16k1 sites sequentially.Moreover, Co atoms occupying 8j2 site are more effective leading to an increase in theThe individual effects of Ni or Cu on the intrinsic magnetic properties of Ce 2 Fe 12.98x Co 1.02 Ni x B and Ce 2 Fe 12.98-y Co 1.02 Cu y B are evaluated. The maximum solid solubilities of Ni and Cu in Ce 2 Fe 12.98 Co 1.02 B at 900ºC are found to be 8 at.% and 0.8 at.%, respectively. Ni or Cu enhances T c , but decreases both M s and H a of Ce 2 Fe 12.98 Co 1.02 B. The paper also discussed the combined effects of Ni and Cu on the intrinsic magnetic properties of Ce 2 Fe 12.98 Co 1.02 B. The M s of Ce 2 Fe 12.98-x-y Co 1.02 Ni x Cu y B (0≤x≤0.41, y≈0.119) increases after doping with both Ni and Cu, reaching around 155 emu/g. Meanwhile, the H a and the T c are measured to be near 24 kOe and 280°C, respectively.

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Section: Accepted Manuscriptmentioning

confidence: 48%

Intrinsic magnetic properties of Ce2(Fe, Co)14B and its modifications by Ni and Cu

Wang

Medraj

2018

Journal of Alloys and Compounds

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“…With 0.6 at % Si, the Curie temperature rises by 30°C [151]. Li et al [152] found in their early work that addition of 1 at% Si in (NdCe)(FeSi)B alloys improves the coercivity.…”

Section: Si and Al Additionmentioning

confidence: 99%

Nd2Fe14B permanent magnets substituted with non-critical light rare earth elements (Ce, La): A review

Delette

2023

Journal of Magnetism and Magnetic Materials

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“…One approach for plugging the gap between ferrites and NdFeB is to replace Nd with less expensive elements. Ce-substituted NdFeB and SmCo compounds and their alloys have been investigated [31] and show promising cost-to-performance results. Ce is regarded as an RE metal but is still relatively abundant, making up 66 ppm of the earth's crust, comparing to 41 ppm for Nd [32].…”

Section: Materials That Could Be Used In Future Electrical Machinesmentioning

confidence: 99%

An Overview of MnAl Permanent Magnets with a Study on Their Potential in Electrical Machines

et al. 2020

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In this paper, hard magnetic materials for future use in electrical machines are discussed. Commercialized permanent magnets used today are presented and new magnets are reviewed shortly. Specifically, the magnetic MnAl compound is investigated as a potential material for future generator designs. Experimental results of synthesized MnAl, carbon-doped MnAl and calculated values for MnAl are compared regarding their energy products. The results show that the experimental energy products are far from the theoretically calculated values with ideal conditions due to microstructure-related reasons. The performance of MnAl in a future permanent magnet (PM) generator is investigated with COMSOL, assuming ideal conditions. Simplifications, such as using an ideal hysteresis loop based on measured and calculated saturation magnetization values were done for the COMSOL simulation. The results are compared to those for a ferrite magnet and an NdFeB magnet. For an ideal MnAl hysteresis loop, it would be possible to replace ferrite with MnAl, with a reduced weight compared to ferrite. In conclusion, future work for simulations with assumptions and results closer to reality is suggested.

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Intrinsic Magnetic Properties of Ce2Fe14B Modified by Al, Ni, or Si

Cited by 13 publications

References 48 publications

Intrinsic magnetic properties of Ce2(Fe, Co)14B and its modifications by Ni and Cu

Intrinsic magnetic properties of Ce2(Fe, Co)14B and its modifications by Ni and Cu

Nd2Fe14B permanent magnets substituted with non-critical light rare earth elements (Ce, La): A review

An Overview of MnAl Permanent Magnets with a Study on Their Potential in Electrical Machines

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