1993/05/15 by C. D. Fuerst, E. G. Brewer · 1 citation
Materials Science · #Magnetic Properties of Alloys #Hydrogen Storage and Materials #Magnetic Properties and Applications #Remanence #Materials science #Coercivity #Upset #Magnet #Metallurgy #Die (integrated circuit) #Dysprosium #Magnetization #Condensed matter physics #Nuclear physics #Magnetic field #Nanotechnology #Electrical engineering #Physics #Mechanical engineering
paper · doi:10.1063/1.353563
openalex publication_date 1993/05/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/26
The best starting materials for die-upset magnets are moderately overquenched melt-spun ribbons of Nd-Fe-B alloys with ∼20 at. % more rare earth than stoichiometric Nd2Fe14B. Remanence increases with increasing die-upset (DU) level, reaching a maximum of 13.5 kG at 70% DU for ternary Nd-Fe-B magnets, beyond which cracking limits performance. Remanence is also limited by nonuniform deformation, particularly for moderately die-upset magnets. Heat treatments, dysprosium substitutions, or low-level additives can be used to compensate for the decreases in coercivity which accompany increases in die-upset level. By die upsetting in stages and removing misaligned surfaces, a large Nd-Fe-Co-B-Ga magnet (∼30 g) has been produced with both a high remanence (14.2 kG) and a high-energy product (48.5 MG Oe).