COMPOSITE SOFT MAGNETIC MATERIAL HAVING HIGH STRENGTH, HIGH MAGNETIC FLUX DENSITY, HIGH RESISTANCE AND LESS IRON LOSS, AND MANUFACTURING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a composite soft magnetic sintered material having high strength, high magnetic flux density and high resistance, and to provide a manufacturing method thereof.;SOLUTION: The composite soft magnetic material having high strength, high magnetic flux density and high resistance is Mg-containing oxide film-coated iron powder in which an Mg-Fe-O ternary oxide deposition film having metal Fe fine particles dispersed in a base is coated on the surface of the iron powder. In the powder, the Mg-Fe-O ternary oxide deposition film having the metal Fe fine particles dispersed in the base has a density gradient in which Mg and O decrease from the surface toward the inside and Fe increases toward the inside, wherein Mg-containing oxide iron film coated iron powder having a sulfur-enriched layer containing sulfur of higher density than that of sulfur contained in the center of the iron powder is bonded to an interface region between the Mg-Fe-O ternary system oxide deposition film and the iron powder with a vanadium oxide-based low melting point glass phase.;COPYRIGHT: (C)2008,JPO&INPIT