NdFeB Magnet Coating Layer Light Curing for Grain Boundary Diffusion
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Solution Overview
Problem
Traditional methods for preparing neodymium-iron-boron (NdFeB) magnets using grain boundary diffusion face challenges such as high curing temperatures, which can lead to oxidation and combustion of diffusion materials, limiting the selection of materials and increasing costs, and requiring complex and energy-intensive processes.
Innovation Solution
A method involving a light curing treatment using a composite material containing a diffusion material and a light curing agent, applied via a coating and curing device, which reduces the curing temperature to room temperature, allowing for efficient diffusion material integration into the magnet without oxidation, and simplifies the process by shortening curing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature heat treatment is used to cure the composite material, then the diffusion material can be effectively diffused into the magnet, but the diffusion material may undergo oxidation and combustion, limiting material selection and increasing costs
Solution Approach 1:
The patent changes the curing parameter from high temperature heat treatment to light irradiation (wavelength 300-400nm), enabling the composite material to cure at room temperature. This parameter change eliminates oxidation and combustion risks while maintaining effective diffusion into the magnet, resolving the contradiction between diffusion effectiveness and material stability.
Solution Approach 2:
The patent replaces the thermal field (heat treatment) with an optical field (light curing) to achieve material curing. This substitution eliminates the harmful thermal effects that cause oxidation and combustion, while still enabling effective diffusion of the diffusion material into the magnet grain boundaries.
2Reliability
If high temperature heat treatment is used to cure the composite material, then the composite material can be cured, but the process becomes energy-intensive and complex
Solution Approach 1:
The patent substitutes thermal energy with optical energy for the curing process. Light irradiation at wavelengths of 300-400nm activates the photopolymerization of the composite material, achieving effective curing without the high energy consumption associated with high temperature heat treatment.
Solution Approach 2:
The patent changes the curing temperature parameter from high temperature (typically 800-1000°C) to room temperature through light irradiation. This dramatic parameter reduction significantly lowers energy consumption while maintaining curing effectiveness, simplifying the overall process.
3Reliability
If traditional heat treatment method is used, then the composite material can be cured, but the curing time is long and process complexity increases
Solution Approach 1:
The patent replaces the slow thermal diffusion process with rapid photopolymerization triggered by light irradiation. The light curing process activates chemical reactions immediately upon irradiation, reducing curing time from hours to minutes or seconds, while maintaining effective diffusion into the magnet.
Solution Approach 2:
The patent uses light irradiation to rapidly initiate and complete the curing process in a short time period. The photopolymerization reaction proceeds quickly under light exposure, allowing the composite material to cure and the diffusion material to penetrate the magnet rapidly, thus skipping through the lengthy thermal curing process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the production of high-coercivity NdFeB magnets with improved magnetic properties, reduces energy consumption, and facilitates automated production by allowing for the use of a wider range of diffusion materials and simpler processing conditions.
Implementation Method 1
the light source is configured to perform a light curing treatment on the composite material
Data Source
AI summary
A magnetic material preparation device, a magnetic material and a preparation method therefor, and a method for preparing a neodymium iron boron material are provided. The preparation device includes a coating device, a light curing device and a carrier. The magnetic material includes a magnet and a coating layer, at least part of a surface of the magnet is provided with the coating layer, the coating layer includes a diffusion material and a light curing material.The method for preparing the magnetic material includes, coating a composite material containing the diffusion material and the light curing agent on at least part of the surface of the magnet, and performing a light curing treatment. The method for preparing the neodymium iron boron material includes performing diffusion material heat treatment for the neodymium-iron-boron magnet that a surface thereof is combined with a diffusion material and a light curing material.