Structural and magnetic properties of nanocrystalline Fe–Co–Si alloy powders produced by mechanical alloying

摘要: Abstract We report the structural and magnetic properties of nanocrystalline Fe 100−x−y Co y Si x (  = 10, 15,  = 0–20) alloy powders prepared by mechanical alloying process in a planetary ball mill. All as-milled exhibit non-equilibrium α-Fe(Co,Si) solid solution with average crystallite size 7–11 nm. The lattice constant increases initially up to 10 at.% then decreases further increase content due delay dissolution into introduction more Si. variations parameters such as size, dislocation density fraction grain boundary function show good correlations among them. substitution powder both saturation magnetization coercivity atomic ordering which induce additional anisotropy. Thermomagnetization studies reveal that Curie temperature T C ) at rate 4 K per at.% for reduces 1.4 K higher addition. variation reveals strong dependence on composition Fe–Co–Si alloy. observed results improvement soft proper Fe.