METHOD FOR REDUCING A RARE EARTH-BASED MAGNET
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Jun 12, 2014
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Jun 12, 2013
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Abstract
A method of treating a rare earth-based magnet is provided that comprises the following. At least one precursor sintered R2Fe14B-type magnet having a body is provided. A paste is provided that comprising particles comprising a rare earth element R′ and applied to at least one surface other than a surface of the body and a layer of the particles is formed on the at least one surface providing a source of the rare earth element R′. The precursor sintered R2Fe14B-type magnet is placed adjacent the layer and the rare earth element R′ diffused into the precursor sintered R2Fe14B-type magnet from the source, whilst the precursor sintered R2Fe14B-type magnet is adjacent the layer and increasing the content of the R′ rare earth element at least at the outer surface of the body. A rare earth-based magnet is produced.
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