Sintered Nd-Fe-B Permanent Magnets: Microstructure, Diffusion, and Corrosion
This community focuses on the metallurgical engineering of neodymium-iron-boron (Nd-Fe-B) permanent magnets, specifically optimizing their internal structure and surface durability for use in high-performance electric motors and industrial machinery.
The research centers on sintered Nd-Fe-B alloys, with a heavy emphasis on grain boundary engineering and diffusion processes to enhance coercivity and thermal stability. Key methods include hot deformation, annealing, and the application of protective coatings such as electroplated nickel-copper-nickel layers or slippery liquid-infused surfaces to combat corrosion. The work also addresses resource efficiency by substituting critical heavy rare earths like dysprosium and terbium with lighter elements or alternative phase structures, while simultaneously investigating additive manufacturing techniques for magnetic components.
The community represents 4.7% of all samarium research and 3.7% of all neodymium research, with samarium contributing the highest share of papers relative to its total research output. Iron accounts for the largest absolute number of papers within this group, comprising 2,740 entries.
The community comprises 12,734 papers, published primarily in the Journal of Magnetism and Magnetic Materials, the Journal of Applied Physics, and the Journal of Alloys and Compounds.
Recent work continues to target heavy-rare-earth-free high-coercivity magnets and novel production routes that combine grain boundary diffusion with segmentation, alongside advanced studies on the microstructure evolution of soft magnetic alloys under hot isostatic pressing.