US 2025/0166874 A1 · NEODYMIUM-IRON-BORON MAGNET MATERIAL AND PREPARATION METHOD THEREFOR AND USE THEREOF, AND MOTOR

Abstract

Disclosed are a neodymium-iron-boron magnet material, a preparation method, use thereof and a motor. The neodymium-iron-boron magnet material has an amorphous RE-rich phase located in a grain boundary phase. The amorphous RE-rich phase, containing elements TM, RE, Cu and Ga at an atom ratio of TM:RE:Cu:Ga=(15-30):(40-60):(10-25):(10-30), accounts for 3-8% by volume of the grain boundary phase. TM is Fe and Co. RE is a rare earth element. The neodymium-iron-boron magnet material increases the coercivity using none or a small amount of heavy rare earth elements, while maintaining high remanence and magnetic energy.

Claims10

Dependent claims

A neodymium-iron-boron magnet material, comprising an amorphous RE-rich phase located in a grain boundary phase, wherein:

the amorphous RE-rich phase is composed of elements TM, RE, Cu and Ga at an atom ratio of TM:RE:Cu:Ga=(15-30):(40-60):(10-25):(10-30);
and the amorphous RE-rich phase accounts for 3-8% by volume of the grain boundary phase, wherein TM is Fe and Co, and RE is a rare earth element.

A neodymium-iron-boron magnet material, comprising following components in terms of mass percentage:

B:
0.85-1.2 wt %;
Cu:
0.05-0.6 wt %;
Al:
0-0.60 wt %;
Ga:
0.05-0.6 wt %;
wherein the contents of Ga, Cu and B satisfy the following formula:
(B−0.4)Ga≤Cu≤(Ga+Cu)/2, wherein a sum of the contents of all components in the neodymium-iron-boron magnet material is 100%.

7 more elements

Dependencies are inferred from the claim text.

Neodymium-iron-boron magnet material and preparation method therefor and use thereof, and motor

Life of this patent

Neodymium-iron-boron magnet material and preparation method therefor and use thereof, and motor

Life of this patent

Abstract

Claims10