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Preparation method of permanent-magnet healing-accelerated patch

A permanent magnet and permanent magnet material technology, applied in the direction of inductance/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc., can solve problems such as low compressive strength, user loss, and intergranular fracture, so as to improve magnetic properties, The effect of reducing scar formation and fine grain size of the finished product

Inactive Publication Date: 2018-01-05
杨子中
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional sintered NdFeB magnetic materials are typical powder metallurgy products, with low compressive strength, high brittleness, and intergranular fracture easily caused from grain boundaries. With the continuous expansion of the application field of sintered NdFeB magnets, magnets are inevitably Withstand the test of harsh environments such as shock and vibration. Once the magnet breaks, it will bring huge losses to the user

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of permanent magnet quick-healing plaster comprises the following steps:

[0034] (1) The selected model is 42SH magnetic material, and its composition is: Nd 27.8 Fe 65.68 B 1.02 Dy 4.2 al 0.2 co 1.0 Cu 0.1 According to the design formula, the raw materials are prepared, and then the raw materials are melted into cast pieces in a vacuum induction casting furnace, and the average thickness of the cast pieces is 0.3-0.45mm;

[0035] (2) placing the Nd-Fe-B alloy cast sheet obtained in the step (1) in a hydrogen crushing furnace to carry out a hydrogen crushing process to obtain primary crushed powder with a particle size within 10 mm;

[0036] (3) Grind the primary crushed powder obtained in step (2) to NdFeB magnetic powder with a particle diameter in the range of 3-5 μm, for example, particle diameters of 3 μm, 4 μm, and 5 μm, under nitrogen protection Add 0.03wt% graphene powder (thickness is 3-5nm, diameter is 50-1000nm) and mix uniforml...

Embodiment 2

[0051] The preparation method of permanent magnet quick-healing plaster comprises the following steps:

[0052] (1) The selected model is N48 magnetic material, and its composition is: Nd 31.8 Fe 65.58 B 1.02 co 1.0 Cu 0.1 al 0.3 Ga 0.2 , the design formula is matched with the raw materials, and then the raw materials are melted into cast pieces in a vacuum induction casting furnace, and the average thickness of the cast pieces is 0.2-0.45mm;

[0053] (2) placing the Nd-Fe-B alloy cast sheet obtained in the step (1) in a hydrogen crushing furnace to carry out a hydrogen crushing process to obtain primary crushed powder with a particle size within 10 mm;

[0054] (3) Grind the primary crushed powder obtained in step (2) to NdFeB magnetic powder with a particle diameter in the range of 3-5 μm, for example, particle diameters of 3 μm, 4 μm, and 5 μm, under nitrogen protection Add 0.06wt% graphene powder (3-5nm in thickness and 50-1000nm in diameter) and mix uniformly throu...

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Abstract

The invention relates to a permanent-magnet healing-accelerated patch and a preparation method thereof. By the permanent-magnet healing-accelerated patch, NdFeB magnetic powder and graphene powder areuniformly mixed, are oriented in a magnetic field and are pressed to form a blank, a permanent-magnet material is obtained by sintering and thermal processing, and finally, the permanent-magnet material is attached onto a carrier layer to prepare the permanent-magnet healing-accelerated patch. The permanent-magnet healing-accelerated patch has the beneficial effects of promoting wound healing, reducing scar formation, diminishing inflammation and easing pain, is effective and does not needed to be frequently replaced, the permanent-magnet material is fine and uniform in grain, and the dynamicperformance and the coercivity are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of processing, and in particular relates to a preparation method of a permanent magnet quick-healing sticker containing rare earth neodymium, iron and boron materials. Background technique [0002] Traditional sintered NdFeB magnetic materials are typical powder metallurgy products, with low compressive strength, high brittleness, and intergranular fracture easily caused from grain boundaries. With the continuous expansion of the application field of sintered NdFeB magnets, magnets are inevitably Withstand the test of harsh environments such as shock and vibration. Once the magnet breaks, it will bring huge losses to the user. Therefore, it is necessary to do in-depth research on the mechanical properties of sintered NdFeB magnets, optimize the production process, improve the mechanical properties of the magnets such as compressive strength and toughness, and reduce the damage during the subsequent processin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/09H01F41/02B22F9/04B22F3/02B22F3/10
Inventor 杨子中朱丽刚章方强范红军祁艳辉
Owner 杨子中