Process for manufacturing a magnetic core made of a nanocrystalline soft magnetic material
AssigneeMecagis
InventorsPhilippe Verin, Georges Couderchon
Life of this patent
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Abstract
Process for manufacturing at least one magnetic core made of an iron-based soft magnetic alloy having a nanocrystalline structure, wherein an amorphous ribbon is manufactured from the magnetic alloy, the annealing temperature Tm which, in the case of the ribbon, leads to maximum magnetic permeability, is determined, at least one core blank is manufactured from the ribbon and at least one core blank is subjected to at least one annealing operation, said annealing being carried out at a temperature T of between Tm+10.degree. C. and Tm+50.degree. C. for a temperature hold time t of between 0.1 and 10 hours so as to cause nanocrystals to form.
Claims10
A process for manufacturing at least one magnetic core made of an iron-based soft magnetic alloy, wherein:
- an amorphous ribbon is manufactured from the magnetic alloy;
- the annealing temperature Tm which, in respect of the ribbon, leads to the maximum magnetic permeability is determined;
- at least one core blank is manufactured from the ribbon;
- and
- at least one core blank is subjected to at least one annealing operation, the said annealing being carried out at a temperature T of between Tm+10.degree. C. and Tm+50.degree. C. for a temperature hold time t of between 0.1 and 10 hours, so as to form nanocrystals.
Dependencies are inferred from the claim text.