Sintered neodymium-iron-boron magnet containing grain boundary diffusion composite film and preparation method thereof, and modified sintered neodymium-iron-boron magnet and preparation method thereof
The invention provides a sintered NdFeB magnet containing a grain boundary diffusion composite film, a preparation method of the sintered NdFeB magnet, a modified sintered NdFeB magnet and a preparation method of the modified sintered NdFeB magnet. The sintered neodymium-iron-boron magnet containing...
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| creator | SHI GAOYANG HU YILING AN XIAOXIN HAO ZHONGBIN LIU XIAOLANG |
| description | The invention provides a sintered NdFeB magnet containing a grain boundary diffusion composite film, a preparation method of the sintered NdFeB magnet, a modified sintered NdFeB magnet and a preparation method of the modified sintered NdFeB magnet. The sintered neodymium-iron-boron magnet containing the grain boundary diffusion composite film comprises a sintered neodymium-iron-boron magnet body and the grain boundary diffusion composite film wrapping at least one surface of the sintered neodymium-iron-boron magnet body. The grain boundary diffusion composite film comprises a Dy film and a Tb film which are alternately stacked, and the Tb film is in contact with the surface of the sintered neodymium-iron-boron magnet. The Tb element and the Dy element can permeate into the magnet, and the coercive force of the magnet is improved. And due to the limitation of the diffusion rate and depth, the heavy rare earth on the outermost layer of the sintered neodymium-iron-boron magnet is difficult to permeate into the s |
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The sintered neodymium-iron-boron magnet containing the grain boundary diffusion composite film comprises a sintered neodymium-iron-boron magnet body and the grain boundary diffusion composite film wrapping at least one surface of the sintered neodymium-iron-boron magnet body. The grain boundary diffusion composite film comprises a Dy film and a Tb film which are alternately stacked, and the Tb film is in contact with the surface of the sintered neodymium-iron-boron magnet. The Tb element and the Dy element can permeate into the magnet, and the coercive force of the magnet is improved. 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The sintered neodymium-iron-boron magnet containing the grain boundary diffusion composite film comprises a sintered neodymium-iron-boron magnet body and the grain boundary diffusion composite film wrapping at least one surface of the sintered neodymium-iron-boron magnet body. The grain boundary diffusion composite film comprises a Dy film and a Tb film which are alternately stacked, and the Tb film is in contact with the surface of the sintered neodymium-iron-boron magnet. The Tb element and the Dy element can permeate into the magnet, and the coercive force of the magnet is improved. And due to the limitation of the diffusion rate and depth, the heavy rare earth on the outermost layer of the sintered neodymium-iron-boron magnet is difficult to permeate into the s</abstract><oa>free_for_read</oa></addata></record> |
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| language | chi ; eng |
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| subjects | BASIC ELECTRIC ELEMENTS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRICITY INDUCTANCES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAGNETS METALLURGY SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSFORMERS |
| title | Sintered neodymium-iron-boron magnet containing grain boundary diffusion composite film and preparation method thereof, and modified sintered neodymium-iron-boron magnet and preparation method thereof |
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