METHOD FOR MANUFACTURING R-T-B-BASED RARE-EARTH PERMANENT MAGNET

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PROBLEM TO BE SOLVED : To provide a method for manufacturing an R-T-B-based rare-earth permanent magnet for improving mass-productivity of a high performance R-T-B-besed rare-earth permanent magnet.SOLUTION : The manufacturing method includes the steps of manufacturing an R-T-B alloy that is mainly formed of R2T14B phase with inclusion of Co, Zr, and Cu, and an R-T alloy that is mainly formed of R and T; obtaining a mixture formed of powder of R-T-B alloy and powder of R-T alloy; producing a mold of the predetermined shape formed of the mixture; and obtaining a sintered material by sintering the mold. In the step of obtaining the mixture, ≥50% Co included in the mixture is supplied from powder of the R-T-B alloy.COPYRIGHT : (C)2007, JPO&INPIT