The evolution of microstructure and magnetic properties of Fe–Si–Al powders prepared through melt-spinning

Very thin Fe85.8Si9.6Al5.6 (wt.%) nanocrystalline flakes have been fabricated from melt-spun ribbons by a high-energy planetary ball-milling method. A large aspect ratio (>10:1) has been successfully obtained after milling for 70 h, resulting in improved permeability of high frequencies. The ordered D03 superlattice coexisting with α-Fe(Si, Al) matrix in the melt-spun ribbons vanishes with prolonged milling, but recovers after short-time annealing, also resulting in an improvement in magnetic properties.