A kind of ultrahigh magnetic energy product neodymium iron boron permanent magnet material and preparation method thereof

A permanent magnet material, ultra-high magnetic technology, applied in the direction of magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problem of unfavorable production of high coercivity products, easy to react with powder, and increased brittleness of permanent magnets and other problems, to achieve the effect of improving grinding time, improving ultrafine powder loss, and increasing rare earth phase
CN111554464BActive Publication Date: 2022-03-01ORIENT MAGNET TECH OMT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ORIENT MAGNET TECH OMT
Publication Date
2022-03-01

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Abstract

The invention relates to the technical field of rare earth permanent magnet materials, in particular to an ultra-high energy product NdFeB permanent magnet material and a preparation method thereof, the composition of which is RE1xRE2yRE3zFqBoMp; wherein, RE1 is selected from rare earth elements Pr / Nd / Ho / Gd / Ce At least one of, RE2 is selected from at least one of the heavy rare earth elements Dy / Tb, RE3 is an additional rare earth metal or / and rare earth alloy, calculated based on the total mass of RE1, RE2, F, B, M, and its content accounts for For: 29wt%≤x+y+z≤33.5wt%, 0wt%≤y≤3wt%, 0wt%≤z≤2wt%; B is selected from at least one of boron and carbon, and its content is 0.85wt%≤ o≤1.2wt%; M is selected from at least one of Al / Cu / Zr / Nb / Ga / Si / Mo / Ti, and its content is 0.01wt%≤p≤1.5wt%; the rest is F, F At least one selected from transition elements Fe / Co / Ni.
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Description

technical field

[0001] The invention relates to the field of permanent magnet materials, in particular to an NdFeB permanent magnet material. Background technique

[0002] With the development and research of NdFeB materials, the brittleness of NdFeB materials has plagued NdFeB manufacturers and processors. Especially in the pursuit of low cost, the original fine powder is getting finer and finer, making the brittleness of permanent magnet materials more and more difficult. It is becoming more and more obvious that the processing yield is low, especially in the research and development and production of ultra-high energy product materials.

[0003] In the existing research, there is very little improvement in material brittleness. The principle of brittleness is mainly that transgranular fracture and intergranular fracture are easy to form during the hydrogen breaking process of NdFeB flakes. At the same time, because the material is a porous material, it is easy to form por...

Claims

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