Corrosion-resistant rare earth metal-transition metal series mag

Details Corrosion-resistant rare earth metal-transition metal series mag Corrosion-resistant rare earth metal-transition metal series mag

1994-06-28

1995-09-05

Sheehan, John

Metal treatment

Stock

Magnetic

419 12, 75244, H01F 1057

Patent

active

054475783

ABSTRACT:
This invention provides permanent magnets that are excellent not only in magnetic properties but also corrosion resistance by using two magnetically useful phases, i.e., RE.sub.2 TM.sub.14 B phase having a high residual magnetic flux density and a low melting point RE-TM' phase or RE-TM'-B phase which enhances the sinterability and possesses a cleaning action against grain boundaries of the RE.sub.2 TM.sub.14 B main phase. Further the invention provides a method for forming an electrochemically noble composition as a starting material to prepare a two phase magnet.

REFERENCES:
patent: 5011552 (1991-04-01), Otsuka et al.

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