Magnetic and mechanical properties of amorphous alloys by pulse high current
AssigneesChina Steel Corporation, James C. Li
InventorsJames C. Li, Huang Der-Ray
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Abstract
A heating process of improving the magnetic and mechanical properties of ferromagnetic amorphous alloys wherein the amorphous ribbon is treated with rapid heating and rapid magnetic domain impacting in a direct heating manner by means of pulsed high current to improve the magnetism of ferromagnetic amorphous alloys with reduced or eliminated the annealing embrittlement thereof. The heating process is performed in the following conditions: pulse current density: J.gtoreq.10.sup.3 A/cm.sup.2 pulse duration: tp=1 ns-100 ms frequency: f=1 Hz-1,000 Hz heating time: tn=1 sec.-100 secs.
Claims4
A method of improving the magnetic and mechanical properties of ferromagnetic amorphous alloys without causing annealing embrittlement, said method comprising the step of applying a pulsed high current to a ferromagnetic amorphous ribbon so as to rapidly heat the ribbon by the Joule effect, thereby relieving quenched-in stress of the amorphous ribbon.
Dependencies are inferred from the claim text.