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Method of manufacturing vacuum composite film coating on surface of neodymium iron boron magnet

A composite coating and vacuum coating technology, which is applied in vacuum evaporation coating, sputtering coating, ion implantation coating, etc., can solve problems such as coating embrittlement, achieve strong anti-corrosion ability, improve coercive force, binding force and The effect of high density

Inactive Publication Date: 2009-04-08
兰州大成科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the shortcomings of acidic or alkaline solution remaining in the pores of the magnet during traditional wet plating and the magnet absorbing hydrogen during the electroplating process, resulting in embrittlement of the coating

Method used

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  • Method of manufacturing vacuum composite film coating on surface of neodymium iron boron magnet
  • Method of manufacturing vacuum composite film coating on surface of neodymium iron boron magnet
  • Method of manufacturing vacuum composite film coating on surface of neodymium iron boron magnet

Examples

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Effect test

Embodiment 1

[0028] Embodiment 1: a preparation method of vacuum composite coating on the surface of an NdFeB magnet, comprising the following steps:

[0029] A. Pretreatment, use a mixture of cleaning solution and pure water at a ratio of 1:1000 in an ultrasonic cleaning machine to remove oil and clean the surface of the magnet with a release agent;

[0030] B. Ion cleaning and activation, the pretreated NdFeB magnet is dried at a temperature of 80°C-100°C for 5-10 minutes, and then bombarded and activated by glow plasma in a vacuum environment to increase the surface activation energy; The steps of the glow plasma cleaning are: pre-evacuation, when the vacuum degree of the chamber is 8×10 -4 -3×10 -3 After Pa, the vacuum chamber body is filled with nitrogen through the flow control instrument to maintain the chamber body pressure at 4-5Pa; for the glow plasma, a voltage of 500-3000V is applied between the bombardment plate in the vacuum chamber body and the chamber body , the current i...

Embodiment 2

[0033] Embodiment 2: a preparation method of vacuum composite coating on the surface of an NdFeB magnet, comprising the following steps:

[0034] A. Pretreatment, use a mixture of cleaning solution and pure water at a ratio of 1:1000 in an ultrasonic cleaning machine to remove oil and clean the surface of the magnet with a release agent;

[0035] B. Ion cleaning and activation, the pretreated NdFeB magnet is dried at a temperature of 80°C-100°C for 5-10 minutes, and then bombarded and activated by glow plasma in a vacuum environment to increase the surface activation energy; The steps of the glow plasma cleaning are: pre-evacuation, when the vacuum degree of the chamber is 8×10 -4 -3×10 -3 After Pa, the vacuum chamber body is filled with argon gas through a flow control instrument to maintain the chamber body pressure at 4-5Pa; for the glow plasma, add 500-3000V between the bombardment plate and the chamber body in the vacuum chamber body Voltage, current 0.5-3A, produces pl...

Embodiment 3

[0038] Embodiment 3: a kind of preparation method of vacuum composite coating film on the surface of NdFeB magnet, comprises the following steps:

[0039] A. Pretreatment, use a mixture of cleaning solution and pure water at a ratio of 1:1000 in an ultrasonic cleaning machine to remove oil and clean the surface of the magnet with a release agent;

[0040] B. Ion cleaning and activation, the pretreated NdFeB magnet is dried at a temperature of 80°C-100°C for 5-10 minutes, and then bombarded and activated by glow plasma in a vacuum environment to increase the surface activation energy; The steps of the glow plasma cleaning are: pre-evacuation, when the vacuum degree of the chamber is 8×10 -4 -3×10 -3 After Pa, the vacuum chamber body is filled with nitrogen through the flow control instrument, and the chamber body pressure is maintained at 4-5Pa; for the glow plasma, a voltage of 500-3000V is applied between the high voltage rod in the vacuum chamber body and the chamber body, ...

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Abstract

The invention relates to the technical filed of vacuum plating, in particular to a preparation method for conducting vacuum compound plating on the surface of a neodymium iron boron magnet, which is characterized in that the preparation method comprises the following steps: A. pre-treatment, the mixed liquor of washing liquid and purified water is used for conducting oil removal and parting medium washing to the magnet surface in an ultrasonic wave cleaner; B. ion cleaning and activation, the pre-treated neodymium iron boron magnet which is dried at 80-100 DEG C for 5-10 minutes undergoes bombardment activation of a glow plasma in vacuum environment, so as to increase surface activation energy; and C. vacuum plating, vacuum plating treatment is conducted to the neodymium iron boron magnet washed by ions in a vacuum chamber, and a metal plating is prepared on the surface. The deposited metal film on the surface of the neodymium iron boron magnet has the advantages of good stability, high bonding force and tightness, stronger anti-corrosion performance in cold and hot alternation environment. Furthermore, in the physical vapor deposition plating process, the plating thickness is affected much less by the magnet workpiece corner than in electroplating and chemical plating, and the pollution problem is avoided in the preparation process.

Description

Technical field: [0001] The invention relates to the technical field of vacuum coating, in particular to the preparation of surface coating of NdFeB permanent magnet materials. Background technique: [0002] A new type of permanent magnet material, neodymium iron boron (NdFeB) is the third generation of rare earth permanent magnet materials that appeared in 1983, and its magnetic energy product ratio is higher than that of samarium-cobalt (SmCO 2 ) is twice as high as the permanent magnet alloy, 6 to 7 times higher than AlNiCo (AiNiCo), and more than ten times higher than ferrite, which has attracted great attention from the magnetic field and strong interest from manufacturers and users. It is widely used in manufacturing, metallurgical industry, instrumentation and micro motors. my country's neodymium reserves account for 80% of the world's total reserves. In terms of NdFeB production, it has initially formed its own industrial system. The "Eleventh Five-Year Plan" perio...

Claims

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Application Information

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IPC IPC(8): C23C14/24C23C14/02C23C14/35C23C14/54C23C14/14
Inventor 范多旺范多进王成兵苗树翻马海林王成龙
Owner 兰州大成科技股份有限公司
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