MANUFACTURE OF PERMANENT MAGNET

PURPOSE:To prevent both oxidization of alloy powder and the deterioration of magnetic characteristics caused by oxidization by a method wherein a permanent magnet is manufactured using the slurry, in which alloy powder is dispersed, as the material by performing a dry molding method. CONSTITUTION:Fi...

Ausführliche Beschreibung

Gespeichert in:

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
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PURPOSE:To prevent both oxidization of alloy powder and the deterioration of magnetic characteristics caused by oxidization by a method wherein a permanent magnet is manufactured using the slurry, in which alloy powder is dispersed, as the material by performing a dry molding method. CONSTITUTION:First, a rare-earth metal, B and Fe are prepared, and an alloy into is formed by dissolving these materials. They are coarsely pulverized, and then they are finely pulverized to the degree of 10mum or below. Then, the obtained finely pulverized powder is mixed and agitated with an organic solvent, and a slurry is manufactured. Subsequently, said slurry is filled in a wet type molding metal mold, compressed in a magnetic field, the organic solvent is exhausted to outside the mold, and a molded body is obtained. After this molded body is dried up, it is sintered in a vacuum or inert gas atmosphere, a heat treatment is performed, and an Nd-Fe-B permanent magnet is obtained.