Magnetic properties evaluation of Fe-based amorphous alloys synthesized via spark plasma sintering

Fe77.7Si8B10P4Cu0.3 amorphous powder compacts with high relative density (rho r = 94%), high saturated magnetic induction (Bs = 1.34 T), and high permeability (mu = 163 at 20 kHz) were fabricated by spark plasma sintering. In this work, Fe77.7Si8B10P4Cu0.3 spherical amorphous powders with good amorphous forming ability were pre-pared by regulating the material composition and the particle size distribution by gas atomization at first. The effect of sintering temperature (Ts) on the structure and magnetic properties of powder compacts was system-atically investigated. The powder compacts sintered at Ts of 696-712 K were found to remain amorphous structure and exhibit optimal structural and magnetic performance, due to the high temperature and high pressure employed in SPS with high heating rate. These results are promising for the applications of Fe-based amorphous powder alloys in soft magnetic devices requiring tens of kilo-hertz frequency.

Automated summary

Amorphous powder compacts of Fe77.7Si8B10P4Cu0.3 with high relative density (rho r = 94%), high saturated magnetic induction (Bs = 1.34 T), and high permeability (mu = 163 at 20 kHz) were fabricated by spark plasma sintering. Fe77.7Si8B10P4Cu0.3 spherical amorphous powders with good amorphous forming ability were prepared by regulating the material composition and the particle size distribution using gas atomization.