Abstract

In this study, chemical solution mixing and hydrogen reduction method was used to fabricate nanostructured Fe_xCo_1-x alloy powders. Fe-Co chloride mixture, FeCl_2 and COCI_2 with 99.9％ purity, were reduced in hydrogen atmosphere. Nanostructured Fe-Co alloy powders with a grain size of 50 nm were successfully fabricated. Magnetic properties of fabricated Fe_xCo_1-x(x=0, 10, 30, 50, 70, 100) alloy powders with the same grain size were measured because size factor can affect magnetic properties. Coercivity of Fe-Co alloy powders were increased with increasing Co contents. Maximum value of coercivity in various Co contented Fe-Co alloy powders with similar grain size was 125 Oe at Fe_100. Saturation magnetization value at Fe_70Co_30 composition showed maximum value of 219 emu/g and saturation magnetization value decreased with increasing Co contents and minimum value of 155 emu/g was observed at Co_100.

• Keywords: Fe-Co alloy powder;chemical solution mixing;Hydrogen reduction;coercivity;