PROCESS FOR PRODUCTION OF R-T-B BASED SINTERED MAGNETS AND R-T-B BASED SINTERED MAGNETS
First Claim
1. A method for producing a sintered R-T-B based magnet, the method comprising the steps of:
- providing a sintered R-T-B based magnet body;
providing an RH diffusion source including a metal or an alloy of a heavy rare-earth element RH (which is at least one of Dy an Tb);
loading the sintered R-T-B based magnet body and the RH diffusion source into a processing chamber so that the magnet body and the diffusion source are movable relative to each other and brought close to, or in contact with, each other; and
performing an RH diffusion process by conducting a heat treatment on the sintered R-T-B based magnet body and the RH diffusion source at a temperature of 500°
C. to 850°
C. for at least 10 minutes while moving the magnet body and the diffusion source either continuously or discontinuously in the processing chamber.
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Accused Products
Abstract
A method for producing a sintered R-T-B based magnet includes the steps of: providing a sintered R-T-B based magnet body 1; providing an RH diffusion source 2 including a metal or an alloy of a heavy rare-earth element RH (which is at least one of Dy an Tb); loading the sintered magnet body 1 and the RH diffusion source 2 into a processing chamber 3 so that the magnet body 1 and the diffusion source 2 are movable relative to each other and brought close to, or in contact with, each other; and performing an RH diffusion process by conducting a heat treatment on the sintered R-T-B based magnet body 1 and the RH diffusion source 2 at a temperature of 500° C. to 850° C. for at least 10 minutes while moving the magnet body 1 and the diffusion source 2 either continuously or discontinuously in the processing chamber 3.
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Citations
7 Claims
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1. A method for producing a sintered R-T-B based magnet, the method comprising the steps of:
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providing a sintered R-T-B based magnet body; providing an RH diffusion source including a metal or an alloy of a heavy rare-earth element RH (which is at least one of Dy an Tb); loading the sintered R-T-B based magnet body and the RH diffusion source into a processing chamber so that the magnet body and the diffusion source are movable relative to each other and brought close to, or in contact with, each other; and performing an RH diffusion process by conducting a heat treatment on the sintered R-T-B based magnet body and the RH diffusion source at a temperature of 500°
C. to 850°
C. for at least 10 minutes while moving the magnet body and the diffusion source either continuously or discontinuously in the processing chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification