R-T-B-based sintered magnet and method for producing same

An R-T-B-based sintered magnet characterized by containing 27.5 to 34.0% by mass of R, 2 to 10% by mass of RH, 0.89 to 0.95% by mass of B, 0.1 to 0.2% by mass of Ti, 0.3 to 0.7% by mass of Ga, 0.07 to 0.50% by mass of Cu, 0.05 to 0.50% by mass of Al, 0 to 0.3% by mass of M (wherein M represents Nb a...

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Bibliographische Detailangaben
Hauptverfasser:	Nozawa, Noriyuki, Kuniyoshi, Futoshi, Ishii, Rintaro, Satoh, Teppei, Nishiuchi, Takeshi
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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Zusammenfassung:	An R-T-B-based sintered magnet characterized by containing 27.5 to 34.0% by mass of R, 2 to 10% by mass of RH, 0.89 to 0.95% by mass of B, 0.1 to 0.2% by mass of Ti, 0.3 to 0.7% by mass of Ga, 0.07 to 0.50% by mass of Cu, 0.05 to 0.50% by mass of Al, 0 to 0.3% by mass of M (wherein M represents Nb and/or Zr) and a remainder made up by T and unavoidable impurities, and satisfying the following formulae (1), (2) and (3): (1) [T]-72.3([B]-0.45[Ti]) > 0; (2) ([T]-72.3([B]-0.45[Ti]))/55.85 < 13[Ga]/69.72; and (3) [Ga] ≥ [Cu].