QUENCHED ALLOY FOR R-T-B-BASED SINTERED PERMANENT MAGNET, AND R-T-B-BASED SINTERED PERMANENT MAGNET USING THE SAME

PROBLEM TO BE SOLVED: To provide a quenched alloy for an R-T-B-based sintered permanent magnet, which has a structure in which constituents of an R-rich phase are uniformly and finely dispersed, has superior crushability and can enhance an orientation degree. SOLUTION: The quenched alloy for the R-T...

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Hauptverfasser:	HISAMURA TAKAYUKI, FUJIMORI NOBUHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BASIC ELECTRIC ELEMENTS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CHEMISTRY ELECTRICITY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INDUCTANCES MAGNETS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS POWDER METALLURGY SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TRANSFORMERS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a quenched alloy for an R-T-B-based sintered permanent magnet, which has a structure in which constituents of an R-rich phase are uniformly and finely dispersed, has superior crushability and can enhance an orientation degree. SOLUTION: The quenched alloy for the R-T-B-based sintered permanent magnet (wherein R represents at least one element among rare earth elements, T represents at least one element among transition metal elements and B represents boron) is formed into a thin-sheet shape by quenching a molten metal of the alloy, and has a radial structure starting from a nucleation point formed on both principal surfaces of the thin sheet, in which a ratio I(410)/I(006)of the intensities I(410)and I(006)of X-ray diffraction patterns (410) and (006) respectively is 0.2 or less in the both principal surfaces and in planes parallel to the both principal surfaces in a region from one principal surface to the other principal surface, and the c-axis is oriented in a direction perpendicular to the both principal surfaces. COPYRIGHT: (C)2009,JPO&INPIT