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GRAIN BOUNDARY DIFFUSION METHOD OF R-FE-B SERIES RARE EARTH SINTERED MAGNET, HRE DIFFUSION SOURCE AND PREPARATION METHOD THEREOF
GRAIN BOUNDARY DIFFUSION METHOD OF R-FE-B SERIES RARE EARTH SINTERED MAGNET, HRE DIFFUSION SOURCE AND PREPARATION METHOD THEREOF
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机译:R-FE-B系列稀土烧结磁体的晶界扩散方法,HRE扩散源及其制备方法
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摘要
The present invention discloses a grain boundary diffusion method of an R—Fe—B series rare earth sintered magnet, an HRE diffusion source, and a preparation method thereof, comprising the following steps: engineering A of forming a dry layer on a high-temperature-resistant carrier, the dry layer being adhered with HRE compound powder, the HRE being at least one of Dy, Tb, Gd, or Ho; and engineering B of performing heat treatment on the R—Fe—B series rare earth sintered magnet and the high-temperature-resistant carrier treated with the engineering A in a vacuum or inert atmosphere and supplying HRE to a surface of the R—Fe—B series rare earth sintered magnet. The method can reduce the consumption of heavy rare earth element and control the loss of residual magnetism Br while increasing the coercivity.
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