Method of obtaining a magnetic material of the rare earth/transition metals/boron type in divided form for corrosion-resistant magnets
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United States of America Patent
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Jun 22, 1993
Grant Date -
N/A
app pub date -
Jul 25, 1991
filing date -
Jul 25, 1990
priority date (Note) -
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Abstract
The invention relates to a method of obtaining friable and relatively inert TR Fe B type magnetic materials in divided form which lead to magnets having improved corrosion resistance. This method involves treating the material in an atmosphere containing (or capable of containing) hydrogen under the following conditions of absolute pressure (P) and of temperature (T.degree. C.): if P.ltoreq.Pa, 250
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