High‐pressure sintering characteristics of Sm2Fe17Nx powder

Sintering characteristics of Sm2Fe17Nx were studied under high‐pressure conditions (pressure=3 GPa and temperatures=300, 550, and 800 °C) without any binding material. High‐pressure treatments at 3 GPa and 550 °C succeeded in preparing the sintered materials without any decomposition, which possessed density values close to the theoretical one and good mechanical strength property, although the temperature of 300 °C was little enough for sintering of the Sm2Fe17Nx powder and the sample prepared at 800 °C provided a different x‐ray diffraction (XRD) pattern from that of Sm2Fe17Nx. The result that the remanence values of Sm2Fe17Nx were almost similar to each other (6.5–7.0 kG) before and after the sintering at 3 GPa and 550 °C indicated that the high‐pressure treatments never involved any serious undesirable effect on the magnetization property of resulting sintered materials.