Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Anisotropic nanocrystalline rare earth permanent magnet and preparation method therefor

A rare earth permanent magnet, anisotropic technology, applied in the direction of magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problem of the small number of rare earth permanent magnet slip systems, poor magnetic powder contact surface conditions, difficult plastic deformation, etc. problems, to achieve the effect of overcoming fewer slip systems, abundant types, and shortened temperature and time.

Active Publication Date: 2017-02-22
SICHUAN UNIV
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art, to provide a graphene-added anisotropic nanocrystalline rare earth permanent magnet and its preparation method, to overcome the rare earth permanent magnet slip coefficient number is small, the magnetic powder contact surface condition is bad, Defects such as difficulty in plastic deformation, while further improving the magnetic properties of rare earth permanent magnet materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anisotropic nanocrystalline rare earth permanent magnet and preparation method therefor
  • Anisotropic nanocrystalline rare earth permanent magnet and preparation method therefor
  • Anisotropic nanocrystalline rare earth permanent magnet and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) According to the chemical formula Nd 29.89 Fe 66.15 co 5.93 Ga 0.64 B 0.92 Ingredients, the raw materials used are rare earth neodymium with a purity greater than 99.5%, gallium with a purity of 99.99%, cobalt with a purity of 99.9%, pure iron with a purity greater than 99.9%, and ferroboron with a boron content of 19.3% by weight;

[0036] (2) The configured Nd 29.89 Fe 66.15 co 5.93 Ga 0.64 B 0.92 The alloy raw materials are put into the smelting quick-setting crucible of the intermediate frequency induction furnace, and the vacuum degree reaches 10 -2 When Pa is above, power on and preheat until the vacuum degree reaches 10 again. -2 When the pressure of Ar in the furnace reaches -0.05MPa, adjust the power of the melting furnace to the melting power for smelting. After all the raw materials are melted, stir and refine for 3 minutes. After refining, the alloy liquid Pouring into a water-cooled copper mold to obtain Nd 29.89 Fe 66.15 co 5.93 Ga 0.64 B...

Embodiment 2

[0045] (1) According to the chemical formula MM 29.6 Fe 63.2 co 6.0 Ga 0.6 al 0.2 B 1.0 (MM is a mixed rare earth, mainly containing Ce, Nd, Pr, and a small amount of Dy) ingredients, the raw material MM used is 49.8wt% Ce, 25wt% Nd, 25wt% Pr, 0.2wt% Dy, and the purity is 99.99% gallium, cobalt with a purity of 99.9%, aluminum with a purity of 99.95%, pure iron with a purity greater than 99.9%, and ferroboron with a boron content of 19.3% by weight;

[0046] (2) The configured MM 29.6 Fe 63.2 co 6.0 Ga 0.6 al 0.2 B 1.0 The alloy raw materials are put into the smelting quick-setting crucible of the intermediate frequency induction furnace, and the vacuum degree reaches 10 -2 When Pa is above, power on and preheat until the vacuum degree reaches 10 again. -2 When the pressure of Ar in the furnace reaches -0.05MPa, adjust the power of the melting furnace to the melting power for smelting. After all the raw materials are melted, stir and refine for 3 minutes. After ref...

Embodiment 3

[0055] (1) According to the chemical formula Ce 33 Fe 66.15 Ga 0.5 B 1.35 Ingredients, the raw materials used are rare earth cerium with a purity greater than 99.5%, gallium with a purity greater than 99.9%, pure iron with a purity greater than 99.9%, and ferroboron with a boron content of 19.3 wt%.

[0056] (2) The configured Ce 33 Fe 66.15 Ga 0.5 B 1.35 The alloy raw materials are put into the smelting quick-setting crucible of the intermediate frequency induction furnace, and the vacuum degree reaches 10 -2 When Pa is above, power on and preheat until the vacuum degree reaches 10 again. -2When the pressure of Ar in the furnace reaches -0.05MPa, adjust the power of the melting furnace to the melting power for smelting. After all the raw materials are melted, stir and refine for 3 minutes. After refining, the alloy liquid poured into a water-cooled copper mold to obtain Ce 33 Fe 66.15 Ga 0.5 B 1.35 alloy ingot;

[0057] (3) Coarsely crush the alloy ingot into par...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Film diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an anisotropic nanocrystalline rare earth permanent magnet. The anisotropic nanocrystalline rare earth permanent magnet consists of nanocrystalline with the chemical formula of REFe<100-a-b-c>BTM<c> and graphene / or graphene microchips, wherein the content of the graphene / or graphene microchips is 0.01-1wt%; in the chemical formula of REFe<100-a-b-c>BTM<c>, a is greater than or equal to 28 and less than or equal to 33; b is greater than or equal to 0.9 and less than or equal to 1.35; c is greater than or equal to 0.15 and less than or equal to 7; RE is at least one of Ce, Nd, Pr or Dy; and TM is at least one of Ga, Co, Cu, Nb, Al, Zr, V, Si or Ti. The invention also provides a preparation method for the anisotropic nanocrystalline rare earth permanent magnet. The shortcomings of relatively low magnet slip coefficient of the rare earth permanent magnet material RE-Fe-B, harsh conditions of a contact surface of magnetic powder, difficulty in plastic deformation and the like are overcome; and the magnetic performance of the rare earth permanent magnet material is further improved.

Description

technical field [0001] The invention belongs to the technical field of rare earth permanent magnet materials, and in particular relates to an anisotropic nanocrystalline rare earth permanent magnet and a preparation method thereof. Background technique [0002] Nd-Fe-B permanent magnet materials have excellent comprehensive hard magnetic properties such as high residual magnetization, high coercive force and high magnetic energy product, and are widely used in electromechanical, information, communication and medical fields. Nanocrystalline Nd-Fe-B permanent magnets are one of the research hotspots of rare earth permanent magnetic alloy materials because of their superior temperature stability and fracture toughness compared to traditional microcrystalline sintered magnets. Hot pressing / hot deformation process is one of the effective means to prepare full-density anisotropic Nd-Fe-B magnets. Due to the mechanical anisotropy of Nd-Fe-B magnets, that is, the Young's modulus o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0576H01F1/0577H01F41/0266
Inventor 刘颖王仁全李军
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com