Permanent magnet and manufacturing method therefor
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United States of America Patent
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Mar 27, 2018
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N/A
app pub date -
Jun 27, 2013
filing date -
Jul 9, 2012
priority date (Note) -
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Abstract
In permanent magnets formed by division, a cut-out part is provided in a straight line in the matrix of the permanent magnets, a metal increasing the coercive force the permanent magnet matrix is diffused into the interior of the matrix from a surface that includes the surface of the cut-out part of the permanent magnet matrix, and the permanent magnet matrix is divided into multiple permanent magnet parts along the straight cut-out part to form the permanent magnets. An Nd—Fe—B sintered magnet may be used as the permanent magnet matrix, and dysprosium (Dy) may be used as the metal increasing the coercive force of the permanent magnet. Multiple indentations disposed in a straight line may be used as the cut-out parts, or a straight groove may also be used.
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