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Method for preparing viscose magnet component with protective coating surface

A magnet assembly and protective coating technology, which is applied in the field of preparation of viscose magnet assemblies, can solve the problems of inability to coat cathode electrophoresis epoxy resin coating and the inability to handle the magnets of viscose assemblies, so as to improve the bonding force, The effect of improving corrosion resistance and increasing the contact area

Inactive Publication Date: 2017-05-31
EARTH PANDA ADVANCE MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the magnet assembly after gluing is not conductive, it cannot be coated with cathodic electrophoresis epoxy resin coating, and the magnet of the gluing assembly cannot be subjected to the traditional pickling pretreatment process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: a kind of preparation method of adhesive magnet component surface protective coating, comprises the following steps:

[0026] (1) Select four pieces of 20×10×2mm block sintered NdFeB magnets (provided by Anhui Dadixiong New Material Co., Ltd., brand: N48), and use metal quick-drying glue (ergo5800) to sinter the block NdFeB magnets are glued together to form a whole;

[0027] (2) Shot blasting with brown corundum and glass beads mixed sand (mass ratio 1:4) for 2 minutes;

[0028] (3) After ultrasonically cleaning the magnet assembly in deionized aqueous solution for 2 minutes, put it into the mesh cage in the furnace, and then place it in the ion coating machine, and use the cyclic argon ion bombardment process to bombard the surface of the magnet assembly for 20 minutes, and keep the vacuum The vacuum degree of the chamber is 2.5Pa, Ar 2 The flow rate is 125sccm;

[0029] (4) Magnetron sputtering technology is used to deposit a layer of copper on the s...

Embodiment 2

[0038] (1) Select five block-shaped sintered NdFeB magnets with a specification of 20×10×2mm (provided by Anhui Dadixiong New Material Co., Ltd., brand: N48), and use metal quick-drying adhesive (ergo5800) to sinter the block NdFeB magnets are glued together to form a whole;

[0039] (2) Shot blasting with brown corundum and glass beads in a mass ratio of 1:5 for 3.5 minutes;

[0040] (3) After ultrasonically cleaning the magnet in deionized water solution for 3 minutes, put it into the mesh cage in the furnace, and then place it in the ion coating machine, and use the cyclic argon ion bombardment process to bombard the surface of the magnet assembly for 30 minutes, and keep the vacuum chamber The vacuum degree is 5.75Pa, and the Ar flow rate is 155sccm;

[0041] (4) A layer of Ti film is deposited on the surface of the viscose magnet assembly by magnetron sputtering technology, the vacuum degree of the vacuum chamber is kept at 0.3Pa, the Ar flow rate is 70sccm, the bias vol...

Embodiment 3

[0050] (1) Six blocks of sintered NdFeB magnets (provided by Anhui Dadixiong New Material Co., Ltd., brand: N48) with a specification of 20×10×2mm are used, and glued with metal quick-drying adhesive (ergo5800) Assemble into one.

[0051] (2) Use the mixed sand of brown corundum and glass beads in a mass ratio of 1:6 to blast the surface of the magnet assembly for 5 minutes

[0052] (3) Ultrasonically clean the magnet assembly in deionized water solution for 4 minutes, put it into the mesh cage in the furnace, then place it in the ion coating machine, and use the cyclic argon ion bombardment process to bombard the surface of the NdFeB magnet assembly for 40 minutes, keep the vacuum chamber The vacuum degree is 9Pa, and the Ar flow rate is 185sccm;

[0053] (4) Deposit a layer of Zn film on the surface of the cleaned adhesive magnet assembly by magnetron sputtering technology, keep the vacuum degree of the vacuum chamber at 0.4Pa, the Ar flow rate is 95sccm, the bias voltage i...

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Abstract

The invention discloses a method for preparing a viscose magnet component with the protective coating surface. The method includes the steps of subjecting multiple pieces of sintered neodymium-iron-boron magnets to viscose assembly to form a viscose magnet component, subjecting the viscose magnet component to shot blasting, washing the treated viscose magnet component, depositing a metal layer on the surface of the viscose magnet component washed by magnetron sputtering, and coating the surface of the metal layer with an epoxy resin coating through cathode electrophoresis. The method has the advantages that the magnetron sputtering deposition metal coating serves as an intermediate transition layer, so that the shortcoming that the viscose magnets are incapable of conducting electricity and fail to be subjected to cathode electrophoresis epoxy resin coating is overcome, magnet corrosion and coating damage due to direct contact between the magnet surfaces and electrophoresis bath in a traditional cathode electrophoresis process are avoided, and binding force between organic epoxy resin and a sintered neodymium-iron-boron matrix is also enhanced.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a preparation method of an adhesive magnet component coated with a protective coating on the surface. Background technique [0002] Since its appearance in 1983, NdFeB permanent magnets have been widely used in automobiles, electronics, electric power, aerospace, medical equipment and other fields due to their excellent magnetic properties and abundant resource reserves. The sintered NdFeB material is the pillar of the permanent magnet industry. Due to the multi-phase structure of the sintered NdFeB permanent magnet, the Nd-rich phase at the grain boundary is highly active, and the electrochemical potential difference between the phases is large, resulting in poor corrosion resistance of the magnet. , serious self-pulverization phenomenon and other shortcomings, which seriously limit its scope of use. Therefore, it is urgent to improve the corrosion resistance of sint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/057
CPCH01F41/026H01F1/057
Inventor 张鹏杰曹玉杰张浩黄秀莲陈静武衣晓飞熊永飞吴玉程
Owner EARTH PANDA ADVANCE MAGNETIC MATERIAL
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