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Neodymium-iron-boron magnet of aluminum or aluminum alloy composite coating and preparation method thereof

A composite coating, aluminum alloy technology, applied in the direction of metal material coating process, coating, superimposed layer plating, etc., can solve the problems of poor bonding force between aluminum film and substrate, low production efficiency, low coating rate, etc. Achieve the effects of good corrosion resistance and surface adhesion, good corrosion resistance and adhesion, and high process efficiency

Active Publication Date: 2011-04-27
北京钐元新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Up to now, vacuum evaporation is mainly used for aluminum plating on NdFeB, which can be coated in large quantities, and the coating efficiency is also high. However, the bonding force between the vacuum evaporated aluminum film and the substrate is poor, and defects such as pinholes are prone to occur in the film.
At the same time, magnetron sputtering technology is also used, which can improve the bonding force between the film and the substrate and the compactness of the film, but the coating rate of this technology is low, and the production efficiency is correspondingly low

Method used

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  • Neodymium-iron-boron magnet of aluminum or aluminum alloy composite coating and preparation method thereof
  • Neodymium-iron-boron magnet of aluminum or aluminum alloy composite coating and preparation method thereof
  • Neodymium-iron-boron magnet of aluminum or aluminum alloy composite coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: A kind of preparation method of the neodymium-iron-boron magnet of composite aluminum or aluminum alloy coating, adopt multi-arc ion coating technology, on the neodymium-iron-boron magnet, plate the pure aluminum thin film, and then coat the pure aluminum thin film that has been plated Phosphating treatment is carried out on the NdFeB magnet to obtain the NdFeB magnet with aluminum composite coating. The prepared aluminum composite coating has excellent protective properties for sintered NdFeB magnets.

[0030] Multi-arc ion coating process, coating aluminum film on various NdFeB magnets. Specifically: on the Φ600×550mm vertical small multi-arc (arc source target Φ60-100mm, quantity 4) coating equipment, the magnet is placed in a plurality of stainless steel wire woven nets, and the stainless steel wire nets are fixed to the ion coating machine on the stand of the vacuum chamber. The stainless steel wire mesh can rotate and revolve with the support (rota...

Embodiment 2

[0034]Embodiment 2: A kind of preparation method of the neodymium-iron-boron magnet of composite aluminum or aluminum alloy coating, adopt multi-arc ion plating film technology, on the neodymium-iron-boron magnet, plate the aluminum alloy thin film, after the coated aluminum alloy thin film Phosphating treatment is carried out on the NdFeB magnet to obtain an aluminum alloy coated NdFeB magnet. The prepared aluminum composite coating has excellent protective properties for sintered NdFeB magnets.

[0035] Multi-arc ion coating process, coating aluminum alloy film on various NdFeB magnets. Specifically: on the Φ600×550mm vertical small multi-arc (arc source target Φ60-100mm, quantity 4) coating equipment, the magnet is placed in a plurality of stainless steel wire woven nets, and the stainless steel wire nets are fixed to the ion coating machine on the stand of the vacuum chamber. The stainless steel wire mesh can rotate and revolve with the support (rotation speed 12 rpm) to...

Embodiment 3

[0039] Embodiment 3: A kind of preparation method of the NdFeB magnet of composite aluminum or aluminum alloy coating, adopts multi-arc ion plating film technology, on NdFeB magnet, is coated with pure aluminum or aluminum alloy thin film, after the pure aluminum that has plated Phosphating treatment is carried out on the NdFeB magnets of aluminum or aluminum alloy films to obtain composite aluminum or aluminum alloy coated NdFeB magnets. The prepared aluminum composite coating has excellent protective properties for sintered NdFeB magnets.

[0040] Multi-arc ion coating process, coating aluminum or aluminum alloy films on various NdFeB magnets. Specifically: on the Φ600×550mm vertical small multi-arc (arc source target Φ60-100mm, quantity 4) coating equipment, the magnet is placed in a plurality of stainless steel wire woven nets, and the stainless steel wire nets are fixed to the ion coating machine on the stand of the vacuum chamber. The stainless steel wire mesh can rota...

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Abstract

The invention discloses a neodymium-iron-boron magnet of an aluminum or aluminum alloy composite coating and a preparation method thereof. An aluminum or aluminum alloy film is deposited on the neodymium-iron-boron magnet by adopting multi-arc ion plating technology, and then phosphate treatment is performed. The coating is uniform and dense, and is well combined with a matrix. The neodymium-iron-boron magnet applied with the aluminum composite coating with thickness of 10 to 20 microns tolerates high pressure and high humidity (100 to 130 DEG C, 2 to 2.6atm, and 95 to 100 percent RH) for over 200 hours, and tolerates NaCl salt fog corrosion (3.5 to 5 weight percent of NaCl and 25 to 35 DEG C) for over 500 hours. The coating process has high efficiency and low cost; and the prepared composite coating has good corrosion resistance and adhesion performance, and has no influence on the magnetism of the neodymium-iron-boron matrix (mainly small-size magnet).

Description

technical field [0001] The invention relates to an aluminum or aluminum alloy composite coated NdFeB magnet and a preparation method thereof, belonging to the technical field of surface protective coatings, in particular to a method of using multi-arc ion plating technology to plate aluminum or aluminum on a NdFeB magnet Alloy film, after phosphating treatment, meets the high pressure and high humidity resistance of NdFeB magnets and NaCl salt spray corrosion resistance. Background technique [0002] NdFeB permanent magnet is the third generation of rare earth permanent magnet after Sm-Co permanent magnet. Due to its excellent magnetic properties and my country's rich neodymium resources, its research, development and production have developed rapidly. However, due to the chemical composition of the material and the powder metallurgy production process, its surface is easily oxidized and corroded in the use environment, resulting in a decrease in its magnetic properties and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C14/16C23C14/34C23C22/13
Inventor 白雪铠
Owner 北京钐元新材料股份有限公司
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