Ce2Fe14B-based magnet materials

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Line graph showing room-temperature hard-axis magnetic field sweeps of powders of the indicated alloys, indicating magnetic anisotropy fields of approximately 30 kOe. Data of J.Q. Yan.
Room-temperature hard-axis magnetic field sweeps of powders of the indicated alloys, indicating magnetic anisotropy fields of approximately 30 kOe. Data of J.Q. Yan.

CMI researchers at Oak Ridge National Laboratory and Ames Laboratory conducted the activity for this highlight

Innovation
Alloys based on Ce2Fe14B may offer energy products at or exceeding 30 MG-Oe at greatly reduced cost and criticality relative to Nd2Fe14B.

Achievement
First principles calculations and associated experimental work find a series of inexpensive alloys with potential as strong permanent magnets

Significance and Impact
Alloys may become new low-cost permanent magnets and ultimately substitute for some of NdFeB market

Hub Target Addressed 
Win industry adoption of three technologies related to materials substitution for rare-earth magnet materials

Line graph showing room-temperature 3rd quadrant hysteresis loops of melt-spun ribbons of the indicated alloy, showing significant coercivities above 2 kOe. Heat treatment conditions indicated. Data of J. Cui.
Room-temperature 3rd quadrant hysteresis loops of melt-spun ribbons of the indicated alloy, showing significant coercivities above 2 kOe. Heat treatment conditions indicated. Data of J. Cui.


L. Yin, J.Q. Yan, B.C. Sales and D.S. Parker, “Critical Element Free Permanent Magnet Materials Based on Ce2Fe14B,” Phys. Rev. Appl., in press (2022). ORNL Provisional patent 63/344,070 filed May 20, 2022.