MANUFACTURE OF RARE-EARTH COBALT MAGNET

MANUFACTURE OF RARE-EARTH COBALT MAGNET

PURPOSE:To obtain the magnet of high density having high magnetic characteristics by a method wherein a specific oxide is coated on a sintering case. CONSTITUTION:A molded body, obtained by press-molding rare-earth cobalt alloy powder, is placed in a sintering case. When said sintering case is retai...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ISHIHARA KINYA, UCHIDA KIMIO, TOBE HIROYUKI, SATO TAKAYOSHI
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:PURPOSE:To obtain the magnet of high density having high magnetic characteristics by a method wherein a specific oxide is coated on a sintering case. CONSTITUTION:A molded body, obtained by press-molding rare-earth cobalt alloy powder, is placed in a sintering case. When said sintering case is retained in a sintering furnace and a sintering process is goint to be performed thereon, the inside surface of the sintering cas is coated by the oxide such as a rare-earth oxide (Y2O3) or MgO, CaO and the like by performing a coating, a flame spraying, or a vapor deposition method and the like. The molded body is placed in the sintering case, and a sintering treatment is performed. As a result, the baking reaction generating between the sintered body and the sintering case can be prevented.