Microstructural evolutions, phase transformations and hard magnetic properties in polycrystalline Ce–Co–Fe–Cu alloys

This work focuses on systematic studies of Ce–Co based 1:5 permanent magnet alloys of CeCo4.4-xFexCu0.6 and CeCo3.9-xFexCu1.2 (x = 0, 0.3, 0.6, 0.9, 1.2, 1.8) by varying Co:Fe. The overarching aim of this manuscript is to elucidate the hard-magnetic properties through a better understanding of phase...

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Bibliographic Details
Published in:Materials chemistry and physics 2022-07, Vol.286, p.126179, Article 126179
Main Authors: Gandha, Kinjal, Chaudhary, Rakesh P., Kramer, Matthew J., Ott, Ryan T., Paudyal, Durga, Nlebedim, I.C.
Format: Article
Language:English
Subjects:
ADVANCED PROPULSION SYSTEMS
Ce-Co-Cu-Fe Alloys
Cobalt
Coercivity
Composition
Copper
Curie temperature
Evolution
Ferrous alloys
Hard magnetic properties
Homogeneity
Iron
Magnetic properties
Magnetism
MATERIALS SCIENCE
Microstructure
Permanent magnets
Phase evolution
Phase transitions
Solubility
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Summary:This work focuses on systematic studies of Ce–Co based 1:5 permanent magnet alloys of CeCo4.4-xFexCu0.6 and CeCo3.9-xFexCu1.2 (x = 0, 0.3, 0.6, 0.9, 1.2, 1.8) by varying Co:Fe. The overarching aim of this manuscript is to elucidate the hard-magnetic properties through a better understanding of phase formation by the structural, microstructural, and magnetic properties in these materials. Improved mutual solubility of Fe in the 1:5 phase has been observed with an extended homogeneity range by Cu substitution. For both composition series, Fe contents of x ≤ 0.6 show a homogeneous microstructure with a single 1:5 phase and good magnetic properties. The composition region 0.6 
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2022.126179