3:50 PM - 4:10 PM
[15A-T7-03] Sinter-Based Additive Manufacturing of Soft Magnetic Materials
Keywords:Solvent-on-granules 3D Printing, Soft ferromagnetic materials, electrical motors
Solvent on Granules 3D Printing (SG-3DP) grows green parts by jetting solvent drops on powder-binder granule beds. The solvent softens the polymer binder to paste the granules to each other. After depowdering, the green part is consolidated by conventional debinding and sintering. MIM size standard powders are currently used. In this work, soft ferromagnetic parts have been produced from FeSi, FeNi and FeCo powders.
Toroids for magnetic measurements, test cubes and a rotor/stator prototype for electrical motor application have been printed. The green parts were debound under nitrogen and sintered under hydrogen atmosphere, in a single thermal cycle, using a retort furnace. The sintered parts were characterized by measurements of B-H hysteresis cycles, metallography and scanning electron microscopy. The impurity contents of carbon and oxygen were determined by melt extraction. The performance of SG-3DP soft ferromagnetic material is compared with standard machined alloy, MIM and materials processed by other sinter-based AM techniques.
Toroids for magnetic measurements, test cubes and a rotor/stator prototype for electrical motor application have been printed. The green parts were debound under nitrogen and sintered under hydrogen atmosphere, in a single thermal cycle, using a retort furnace. The sintered parts were characterized by measurements of B-H hysteresis cycles, metallography and scanning electron microscopy. The impurity contents of carbon and oxygen were determined by melt extraction. The performance of SG-3DP soft ferromagnetic material is compared with standard machined alloy, MIM and materials processed by other sinter-based AM techniques.