Synthesis and Properties of Bulk Cobalt-Carbide Permanent Magnets
Document Type
Article
Publication Date
7-15-2025
Abstract
Nanocrystalline bulk Co-C permanent magnets were produced by rapid hot consolidation of ball milled powder precursors. Bulk magnets with an average grain size of 20 nm and densities up to 94 percent of the theoretical density were successfully processed at pressures exceeding 1 GPa for the first time. Their microstructural and magnetic properties along with their magnetocrystalline anisotropy values are reported. Presence of iron contamination that results from the use steel milling media in milling was confirmed by elemental mapping of the bulk magnets. It is concluded that iron bonds in the form of hematite and does not adversely affect coercivity values. This study shows that the CoC compound does possess a sizable magnetocrystalline anisotropy, making it a suitable candidate as a rare earth free permanent magnet.
Repository Citation
Turgut, Z.,
Kozlowski, G.,
Shen, Y.,
McLeod, M. V.,
Karapetrova, E.,
Horwath, J.,
& Lucas, M. S.
(2025). Synthesis and Properties of Bulk Cobalt-Carbide Permanent Magnets. Journal of Magnetism and Magnetic Materials, 624, 173021.
https://corescholar.libraries.wright.edu/physics/1544
DOI
10.1016/j.jmmm.2025.173021
