Patent ID: 8177926
Filing Date: 2012-05-15
Classification: C22C,C25C,C25D,H01F

Abstract:
1. A method for the preparation of an amorphous Fe 100-a-b P a M b alloy, in the form of a free-standing foil, wherein: said foil has an average thickness in the range 20 μm-250 μm; in formula Fe the alloy has an amorphous matrix in which nanocrystals having a size lower than 20 nm may be embedded, and the amorphous matrix occupies more than 85% of the volume of the alloy, wherein said method comprises electrodeposition of an alloy deposit using an electrochemical cell having a working electrode which is the substrate for alloy deposition and an anode, said electrochemical cell contains an electrolyte solution which acts as a plating solution and a dc current or a pulse current is applied between the working electrode and the anode, the plating solution is an aqueous solution with a pH ranging from 0.8 to 2.5 and a temperature ranging from 60° C. to 105° C., which contains: a dc or pulse current is applied between the working electrode and the anode with a density ranging from 3 to 150 A/dm wherein the working electrode and the anode are static parallel plate electrodes, and the velocity of the aqueous plating solution is of the order of 100 to 320 cm/s and the gap between the static parallel electrodes is from 0.3 cm to 3 cm.