US 2024/0071683 A1 · Permeating treatment Method for Radially Oriented Sintered Magnet, Magnet, and Composition for Magnet Permeation

Abstract

The present invention provides a permeating treatment method for radially oriented sintered magnet, a magnet, and a composition for magnet permeation, wherein in permeating treatment, the magnet and a target permeation source maintain relative movement therebetween all the time, thus internal defects of the oriented sintered magnet are overcome, and the coercivity and thermal stability of the sintered oriented magnet can be stably improved. Moreover, the present invention, having a controllable permeation amount and uniform permeation, is suitable for permeation reaction of a target permeation source with high viscosity or a low melting point, has a wide range of choice for raw materials, and high utilization ratio of permeation elements substantially with no loss, and low cost, thus being suitable for industrialized popularization and use.

Claims17

Dependent claims

A permeating treatment method for radially oriented sintered ring magnet, wherein in a permeating process, the oriented sintered ring magnet and a target permeation source have relative movement therebetween, for the relative movement, apart from atomic diffusion and migration movement of target permeation source elements with respect to the ring magnet, the target permeation source and the ring magnet are not relatively fixed in macro position, but have macro relative movement which excludes ball-milling movement;

preferably, the macro relative movement is rotation or stirring movement;
preferably, the rotational velocity is 0.01 rpm-6000 rpm, preferably 0.5-1000 rpm, and more preferably 0.5-100 rpm.

A method for improving coercivity of an oriented sintered magnet and repairing internal defects of the magnet, comprising following steps in turn:

A. pre-treatment:
removing pollutants, rust, and an oxide layer from a surface of the magnet;
B. preparing a target permeation source;
C. permeating treatment during moving, wherein the movement is rotation or stirring movement;
D. separating the magnet from a target permeation source substance after the permeating treatment is finished, and subjecting the magnet to tempering treatment on the magnet;
the tempering treatment is conducted at 400-600° C. for 1-20 h;
and
E. obtaining a product after the tempering treatment.

5 more elements

Dependencies are inferred from the claim text.

Permeating treatment Method for Radially Oriented Sintered Magnet, Magnet, and Composition for Magnet Permeation

Life of this patent

Permeating treatment Method for Radially Oriented Sintered Magnet, Magnet, and Composition for Magnet Permeation

Life of this patent

Abstract

Claims17