Fabrication of Fe-6.5wt% Si bulk by spark plasma sintering

Abstract

Fe-6.5wt% Si composite compact was fabricated by spark plasma sintering (SPS). Mechanical alloying (MA) was used to prepare Fe−Si composite powders. The composite powders were sintered by SPS at elevsated temperature from 500°C to 700°C. The experimental results indicate that the non-equilibrium state of composite Fe−Si is preserved in the compact. The density of the bulk rises with the increasing temperature and there is no diffusion of silicon and iron in the interface.

Keywords

Fe-6.5wt% Si / spark plasma sintering / mechanical alloying / non-equilibrium

References

[1] Fish G E, Chang C F, Bye R. Frequency Dependence of Core Loss in Rapidly Quenched Fe-6.5wt% Si. J. Appl. Phys., 1988, 64(10): 5370-5372.

[2] Tanaka Y, Takada Y, Abe M, Masuda S. Magnetic Properties of 6.5% Si−Fe Sheet and Its Applications. J. Magnetism and Magnetic Materials, 1990, 83: 375-376.

[3] Narita Kenji, Enokizono Masato. Effect of Nickel and Manganese Addition on Ductility and Magnetic Properties of 6.5% Silicon-Iron Alloy. IEEE Transactions on Magnetics, 1978, 14(4): 258-262.

[4] Stevulova N, Buchal A, Petrovic P, Tkacova K, Sepelak V. Structural Investigation of the High-energy Milled Fe−Si System. J. Magnetism and Magnetic Materials, 1999, 203: 190-192.

[5] Sanchez Roberto Martinez, Magana Francisco Espinosa, . Meta-stability of Mechanically Alloyed and Spark Plasma Sintered Co₅OTi₅O Powder. J. Japan Society of Powder and Powder metallurgy, 2000, 47(5): 480-483.

[6] Dongming Zhang, Zhengyi Fu. Mechanism and Application of Spark Plasma Sintering Technology. J. Wuhan University of Technology, 1999, 21(6): 15-17.