Bonded Nd-Fe-B magnets without volumetric expansion defects

Details Bonded Nd-Fe-B magnets without volumetric expansion defects Bonded Nd-Fe-B magnets without volumetric expansion defects

1997-12-30

2000-06-13

Sheehan, John

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148302, H01F 1057

Patent

active

060744928

ABSTRACT:
A rare earth-iron-boron magnetic composition containing a rare earth fluoride compound in a sufficient amount to reduce or eliminate the formation of rare earth hydroxide and a method of making the same. The reduction or elimination of the formation of rare earth hydroxide substantially eliminates or significantly reduces eruptions in bonded magnets caused by volumetric expansion defects.

REFERENCES:
patent: 4747924 (1988-05-01), Itoah et al.

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