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NdFeB permanent magnet material for magnetic levitation system and preparation method thereof

A permanent magnet material, NdFeB technology, applied in magnetic materials, inductor/transformer/magnet manufacturing, magnetic objects, etc., can solve problems such as complex grain boundary structure, reduced magnetic properties of materials, limited mechanical properties of NdFeB materials, etc. , to achieve the uniform structure of each component of the alloy, improve the magnetic properties, and improve the effect of comprehensive magnetic properties

Active Publication Date: 2020-10-30
江西永磁磁浮科技有限责任公司
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Problems solved by technology

However, due to the composition ratio and grain boundary structure of the NdFeB material itself, the introduction of the above-mentioned non-magnetic phase components will not only greatly reduce the magnetic properties of the material, but also improve the mechanical properties of the NdFeB material. quite limited

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  • NdFeB permanent magnet material for magnetic levitation system and preparation method thereof
  • NdFeB permanent magnet material for magnetic levitation system and preparation method thereof
  • NdFeB permanent magnet material for magnetic levitation system and preparation method thereof

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[0034] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0035] The high-entropy alloy introduced in the present invention is a new alloy design scheme. High-entropy alloys have many excellent properties that traditional alloys do not have. High-entropy alloys are a class of new materials with great potential. High-entropy alloys generally include multi-component alloys, which are composed of at least 5 metals or combinations of at least 5 metals and non-metals. The mole fraction of each constituent element of the high-entropy alloy is relatively large, and the content of each main element is in the range of about 5% to 35% (at%). Generally, the preparation of high-entropy alloys can be realized by vacuum arc melting or ...

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Abstract

The invention relates to a NdFeB permanent magnet material suitable for a magnetic suspension system and a preparation method thereof. This material is prepared by adoping of 0.5%-5.0%high entropy alloy in the main alloy of RExFe100-x-yBy, so that the alloy of the invention can realize demagnetization coupling through the high entropy alloy. Moreover, since the high entropy alloy doped in the material has a single solid solution nanostructure, the invention can also restrain the alloy grain growth in the sintering process through the high entropy alloy, refine the grain, make the alloy component structure more uniform and uniform, and effectively improve the comprehensive magnetic properties of the NdFeB permanent magnet material. The magnetic performance of the NdFeB permanent magnet material is improved, and further the strength and toughness, the vibration resistance and the corrosion resistance of the material are improved, so that the material is suitable for application environments such as magnetic levitation and the like, which have more restrictions on the working conditions.

Description

technical field [0001] The invention relates to the technical field of permanent magnet materials, in particular to an NdFeB permanent magnet material. Background technique [0002] NdFeB permanent magnet material is the magnetic material with the highest magnetic performance so far. It is called the king of magnetism. NdFeB permanent magnet material is usually made of praseodymium neodymium rare earth metal, boron and other components, and is prepared by powder metallurgy technology. Due to its excellent magnetic properties, NdFeB permanent magnet materials are widely used in emerging technology fields such as wind power generation, new energy vehicles, and maglev trains, and have become an indispensable key functional material in today's new energy industry. [0003] However, since the matrix of the NdFeB permanent magnet material itself is a multi-phase system composed of 2:14:1 rare earth, magnetic phase and Nd-rich phase, its mechanical properties are poor and it is a b...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F1/059H01F41/02
CPCH01F1/0576H01F1/0577H01F1/059H01F41/0253H01F41/0266
Inventor 李家节杨斌仲洁杨牧南邓永芳樊宽刚杨杰
Owner 江西永磁磁浮科技有限责任公司
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