THIN-WALLED R-Fe-B GROUP SINTERED MAGNET AND MANUFACTURING METHOD THEREOF

PROBLEM TO BE SOLVED: To manufacture a small thin-walled working free sintered magnet useful for a motor or an actuator and having suppressed magnetic characteristics manufactured with high dimension accuracy, by suppressing an reaction between carbon and oxygen contained in a binder and a reaction...

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Bibliographische Detailangaben
Hauptverfasser:	TANIGAWA SHIGEO, OGAWA YUICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BASIC ELECTRIC ELEMENTS CASTING CHEMISTRY ELECTRICITY FERROUS OR NON-FERROUS ALLOYS INDUCTANCES MAGNETS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY 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 manufacture a small thin-walled working free sintered magnet useful for a motor or an actuator and having suppressed magnetic characteristics manufactured with high dimension accuracy, by suppressing an reaction between carbon and oxygen contained in a binder and a reaction between carbon and oxygen in a degreased/sintering furnace while reducing cost in a molding process/machining process by employing extrusion molding. SOLUTION: A thin-walled R-Fe-B group sintered magnet (R is a rare-earth element containing one or more kinds of Y) has an R amount of 32.5-37.5 mass%, is the planar shape of a thickness of 1mm or less, and has an oxygen content of 1.00 mass% or less and a carbon content of 0.10 mass%. COPYRIGHT: (C)2005,JPO&NCIPI