RARE-EARTH IRON-BASED RING MAGNET AND METHOD FOR MANUFACTURING SAME
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United States of America Patent
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Issued Date -
Jul 11, 2024
app pub date -
May 16, 2022
filing date -
May 24, 2021
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Abstract
A method for manufacturing a rare-earth iron-based ring magnet includes: (a) obtaining a rare-earth iron-based magnet powder; (b) preparing a compound; (c) forming a green body; (d) inserting the green body into a composite mold, setting the composite mold in a spark plasma sintering (SPS) apparatus, and degreasing the green body by energization at a predetermined current density while applying a pressure to the green body under reduced pressure to obtain a degreased body; and (e) sintering the degreased body by energization at a current density while applying a pressure to the degreased body to obtain a rare-earth iron-based ring magnet.
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