Rare earth permanent magnet material and preparation method thereof and motor

Abstract

The invention relates to the technical field of materials, and discloses a rare earth permanent magnet material and a preparation method thereof and a motor. The rare earth permanent magnet material is prepared from 100 parts by weight of main alloy and 0.005-5.5 parts by weight of multiferromagnetic nanoparticles. The main alloy group is R<a-x>RH<x>Fe<100-a-b-c-d>Co<d>M<c>B, wherein a, b, c, dand x are weight percentages, a is greater than or equal to 26 and less than or equal to 33, b is greater than or equal to 0.9 and less than or equal to 1.2, c is greater than or equal to 0 and lessthan or equal to 1, x is greater than or equal to 0.1 and less than or equal to 8.5, d is greater than or equal to 0.5 and less than or equal to 1.5; R is at least one of Pr, Nd, La, Ce and Gd, RH isDy and / or Ho; and M is at least one of Al, Cu, Ti, V, Cr, Zr, Hf, Mn, Nb, Sn, Mo, Ga, Si, Bi and Pb. The rare earth permanent magnet material has improved coercive force, high-temperature coercive force and high-temperature anti-demagnetization ability while maintaining the remanence and magnetic energy product substantially unchanged.

Description

Technical field [0001] The invention relates to the technical field of materials, in particular to a rare earth permanent magnet material, a method for preparing a rare earth permanent magnet material, a rare earth permanent magnet material prepared by the method, and a motor including the rare earth permanent magnet material . Background technique [0002] Rare earth permanent magnets are high-tech materials and high-tech products that are encouraged and supported by the state. They are widely used in wind power generation, energy-saving elevators, inverter air conditioners, new energy vehicles, automotive EPS and other new energy, energy-saving and environmental protection, intelligent robots and other fields, as well as traditional VCM, mobile phones and other consumer electronics products. Basically, new energy vehicles use rare earth permanent magnet drives as power. As one of the core components of new energy vehicles, the driving characteristics determine the main perform...

AI Technical Summary

Problems solved by technology

Using this method, the Al nanoparticles are uniformly distributed in the main phase Nd 2 Fe 14 On the B grain surface, a non-magnetic NdAl grain boundary phase is formed, which enhances the demagnetic coupling effect between grains and the nucleation field of the reverse magnetization domain, thereby increasing the coercive force of the magnet, but for the magnet applied to the drive motor, the coercivity The coercive force is not enough to resist various demagnetization factors, and it is necessary to develop permanent magnets with higher demagnetization resistance

Images