Vacuum evaporation coating method and rare earth magnet covered with evaporation coating

A technology of vacuum evaporation and rare earth magnets, which is applied in the field of magnet manufacturing, can solve the problems of excessive oxidation, poor protection effect, peeling, etc., and achieve the effects of preventing excessive oxidation, overcoming oxidative damage, and overcoming weak binding force

Active Publication Date: 2014-09-10
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the rare earth magnet metal coatings prepared in the existing way, the binding force between Mg, Al, Zn coatings and the surface of rare earth magnets is much lower than that of MgO, Al 2 o 3 , The binding force between ZnO and the surface of the rare earth magnet, it is easy to peel off from the surface of the magnet, and the protection effect is not good
[0004] At present, the use of MgO vacuum evaporation coating as a protective medium layer has been widely used on glass and silicon wafers. When MgO coating is performed, MgO is generally used as a target, and electron beams or lasers are used to focus

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
  • Vacuum evaporation coating method and rare earth magnet covered with evaporation coating
  • Vacuum evaporation coating method and rare earth magnet covered with evaporation coating
  • Vacuum evaporation coating method and rare earth magnet covered with evaporation coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A rare earth magnet sintered body was prepared, the sintered body had the following atomic composition: Dy was 5, Lu was 0.2, Er was 0.2, Nd was 8.5, Tm was 0.5, Y was 0.1, Co was 1, C was 0.05, and B was 7 , Cu is 0.2, Mn is 0.2, Ga is 0.2, Bi is 0.1, Ti is 0.3, and Fe is the balance. It is produced according to the existing procedures of smelting, flake flakes, hydrogen crushing, jet milling, pressing, sintering and heat treatment of rare earth magnets.

[0053] The heat-treated sintered body is processed into a magnet of 30mm×30mm×5mm, and the direction of 5mm is the orientation direction of the magnetic field. Set of magnets (10 pieces).

[0054] Take another group of magnets (10 pieces) with clean surface as a blank example.

[0055] Send the workpiece racks fixed with magnets into different coating chambers, and move to each coating chamber at a distance of 0.5m 3 Oxygen is introduced at a rate of / hr, and heated to 50-650°C respectively, and pre-oxidized for 0...

Embodiment 2

[0068] A rare earth magnet sintered body was prepared, the sintered body had the following atomic composition: Dy was 5, Lu was 0.2, Er was 0.2, Nd was 8.5, Tm was 0.5, Y was 0.1, Co was 1, C was 0.05, and B was 7 , Cu is 0.2, Mn is 0.2, Ga is 0.2, Bi is 0.1, Ti is 0.3, and Fe is the balance. It is produced according to the existing procedures of smelting, flake flakes, hydrogen crushing, jet milling, pressing, sintering and heat treatment of rare earth magnets.

[0069] The heat-treated sintered body is processed into a 30mm×30mm×8mm magnet, and the 8mm direction is the orientation direction of the magnetic field. After the processed magnet is sandblasted, purged, and cleaned, the surface is finally installed on the workpiece frame, and installed on each workpiece frame. A set of magnets (10 pieces).

[0070] Take another group of magnets (10 pieces) with clean surface as a blank example.

[0071] Send the workpiece racks fixed with magnets into different coating chambers, ...

Embodiment 3

[0082] A rare earth magnet sintered body was prepared, the sintered body had the following atomic composition: Dy was 5, Lu was 0.2, Er was 0.2, Nd was 8.5, Tm was 0.5, Y was 0.1, Co was 1, C was 0.05, and B was 7 , Cu is 0.2, Mn is 0.2, Ga is 0.2, Bi is 0.1, Ti is 0.3, and Fe is the balance. It is produced according to the existing procedures of smelting, flake flakes, hydrogen crushing, jet milling, pressing, sintering and heat treatment of rare earth magnets.

[0083] The heat-treated sintered body is processed into a 30mm×30mm×8mm magnet, and the 8mm direction is the orientation direction of the magnetic field. After the processed magnet is sandblasted, purged, and the surface is cleaned, it is then installed on the workpiece holder, and 10 pieces are installed on the workpiece holder. magnet.

[0084] Send the workpiece frame fixed with the magnet into the coating chamber, and move 1.0m away from the coating chamber. 3 Oxygen is fed at a rate of / hr, and heated to 200°C...

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

No PUM Login to view more

Abstract

The invention discloses a vacuum evaporation coating method and a rare earth magnet covered with an evaporation coating. The method includes steps of: 1) installing a rare earth magnet workpiece to a workpiece rest before pretreatment; 2) sending the workpiece rest into a reaction chamber, and performing preoxidation; 3) sending the workpiece rest to a coating chamber, vacuumizing, heating a meta evaporating material M to an evaporation temperature, and subjecting the rare earth magnet workpiece to evaporation coating; and 4) cooling, restoring to normal pressure and taking the workpiece out. According to the method, the rare earth magnet is subjected to trace oxidation in advance and is subjected to replacement by feeding M steam, thus preventing excessive oxidation of the rare earth magnet, and obtaining a dense MO distribution thin layer and an M layer firmly connected to the MO distribution thin layer.

Description

technical field [0001] The invention relates to the technical field of magnet manufacture, in particular to a method for vacuum evaporation coating and a rare earth magnet covered with evaporation coating. Background technique [0002] Since rare earth magnets are prone to rust, the surface needs to be protected by coating during production. However, the traditional electroplating method has great limitations. Not only is it difficult to control the thickness of the coating, but the surface of the coating is prone to defects such as pitting, hard thorns, peeling, burnt, spots, shadows, and build-up, which will shorten the life of NdFe The service life of boron magnets, while the wastewater generated by electroplating needs secondary treatment to meet the discharge standards, which not only increases production costs, but is also harmful to the environment. [0003] The above-mentioned defects can be avoided by using vacuum evaporation coating technology, and the coating pri...

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): C23C14/24C23C14/18H01F41/20
Inventor 永田浩傅东辉翁松青
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap