Bonded Nd-Fe-B magnets without volumetric expansion defects
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United States of America Patent
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Jun 13, 2000
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N/A
app pub date -
Dec 30, 1997
filing date -
Dec 30, 1997
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Expired
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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.
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