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Recycled Sm-Co bonded magnet filaments for 3D printing of magnets
Ames Laboratory Accepted Manuscripts
  • Helena A. Khazdozian, Ames Laboratory
  • J. Sebastian Manzano, Iowa State University
  • Kinjal Gandha, Ames Laboratory
  • Igor I. Slowing, Iowa State University and Ames Laboratory
  • Ikenna C. Nlebedim, Ames Laboratory
Publication Date
Ames Laboratory; Chemistry
Report Number
IS-J 9630
Journal Title
AIP Advances

Recycling of rare earth elements, such as Sm and Nd, is one technique towards mitigating long-term supply and cost concerns for materials and devices that depend on these elements. In this work recycled Sm-Co powder recovered from industrial grinding swarfs, or waste material from magnet processing, was investigated for use in preparation of filament for 3D printing of bonded magnets. Recycled Sm-Co powder recovered from swarfs was blended into polylactic acid (PLA). Up to 20 vol.% of the recycled Sm-Co in PLA was extruded at 160°C to produce a filament. It was demonstrated that no degradation of magnetic properties occurred due to the preparation or extrusion of the bonded magnet material. Good uniformity of the magnetic properties is exhibited throughout the filament, with the material first extruded being the exception. The material does exhibit some magnetic anisotropy, allowing for the possibility of the development of anisotropic filaments. This work provides a path forward for producing recycled magnetic filament for 3D printing of permanent magnets.

Iowa State University Digital Repository, Ames IA (United States)
Citation Information
Helena A. Khazdozian, J. Sebastian Manzano, Kinjal Gandha, Igor I. Slowing, et al.. "Recycled Sm-Co bonded magnet filaments for 3D printing of magnets" Vol. 8 (2018) p. 056722
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