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Abstract

The invention discloses a neodymium-iron-boron magnet material, a preparation method, and use thereof. The neodymium-iron-boron magnet material of the invention comprises a nanocrystalline Cu-rich phase located in an intergranular triangular zone, wherein: the nanocrystalline Cu-rich phase consists of elements TM, RE, Cu and Ga at an atom ratio of TM:RE:Cu:Ga=(1-20):(20-55):(25-70):(1-15); and a volume percentage of the nanocrystalline Cu-rich phase in the intergranular triangular zone is 4-12%, wherein TM comprises Fe and/or Co, and RE is a rare earth element. The neodymium-iron-boron magnet material of the present invention can improve the intrinsic coercivity and reduce the cost without using heavy rare earth elements or using a small amount of heavy rare earth elements, while maintaining the performances of higher remanence, magnetic energy product and squareness.

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First Claim