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Investigation of the influence of carbon on the magnetic properties of powder injection molded Nd-Fe-B magnet

: Lopes, L.U.; Costa Santos, E.; Hartwig, T.; Wendhausen, P.A.


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE International Magnetics Conference, INTERMAG 2015 : Beijing, China, 11 - 15 May 2015
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4799-7321-7 (CD-ROM)
ISBN: 978-1-4799-7323-1 (Print)
ISBN: 978-1-4799-7322-4 (Electronic)
S.113 (Vol.1)
International Magnetics Conference (INTERMAG) <2015, Beijing>
Fraunhofer IFAM ()

The fabrication of Nd-Fe-B full-dense magnets by Powder Injection Molding (PIM) has been investigated in previous works [1]-[4]. Such studies were motivated by PIM advantages in attaining complex-shaped magnets without diluting the remanence as in the case of injection molded bonded magnets In this technique, the polymeric binders that act as a temporary vehicle that provide rheology for injection molding, are extracted by thermo-chemical routes prior to the sintering stage. This process is controlled by the applied heating rate and furnace atmosphere, which influence the binder decomposition that, in turn, invariably leaves carbon rich residues.