Sintering of Sm-Fe-N Powder

In this study, we examined the sintering of Sm-Fe-N powder. The powder was consolidated into bulk form using the spark plasma sintering method, which resulted in the production of Sm-Fe-N bulk magnets. The magnetic properties of the bulk magnets prepared at 673 K under an applied pressure of 100 MPa using the spark plasma sintering method were much lower than those of the Sm-Fe-N powder. This was attributed to the partial decomposition of the Sm2Fe17N3 phase. However, the magnetic properties of the bulk magnets prepared at 473 K under an applied pressure of 200 MPa using the spark plasma sintering method were almost comparable to those of the Sm-Fe-N powder. It was observed that the resulting Sm-Fe-N magnet retained the original Sm2Fe17N3 phase.