Amorphous alloy powder core and nano-crystal alloy powder core with excellent HF performance and their manufacture method

A nanocrystalline alloy and amorphous alloy technology, applied in the direction of magnetic objects, magnetic materials, inorganic materials, etc., can solve problems such as core cracks, poor core strength, and easy cracking

Inactive Publication Date: 2002-10-09
未来素材公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, if amorphous alloy powders whose strength and ductility are much higher than crystalline alloy powders are subjected to high pressure pressing with water glass as a binder, a large number of cracks will be generated in the core
In addition, since the heat treatment below 500°C cannot diffuse the atoms, the resulting product has very poor core strength and is prone to cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach A

[0028] Preferred Embodiment A-1

[0029] In the solution prepared by dissolving 1 gram of polyimide in dichloromethane, add 99 grams of Fe prepared by high-pressure water spraying method. 73 Si 13 B 10 Nb 3 Cu 1 Amorphous alloy powder (average diameter about 15 microns), mixed for about 10 minutes. Then dry to obtain composite particle powder, the surface of the amorphous alloy powder (15 microns in average diameter) is uniformly coated with polyimide, and its thickness is less than 1 micron.

[0030] Adding 7 grams of the obtained composite particle powder into a mold with an outer diameter of 20 mm and an inner diameter of 12 mm, at room temperature at 20 tons / cm 2 Pressed under a pressure of 100°C, and then heat-treated at 450° C. for 30 minutes in an Ar gas atmosphere, thereby preparing an amorphous core. The properties of this amorphous core are listed in Table 1, namely density, crack condition, saturation magnetic flux density, effective permeability in each frequ...

Embodiment approach B

[0066] Preferred Embodiment B-1

[0067] In the solution prepared by dissolving 1 gram of polyimide in dichloromethane, add 99 grams of Fe prepared by high-pressure water spraying method. 73 Si 13B 10 Nb 3 Cu 1 Amorphous alloy powder (average diameter about 15 microns), mixed for about 10 minutes. The mixture was then dried, thereby producing a composite particle powder such that the surface of the amorphous alloy powder (15 microns in average diameter) was uniformly coated with polyimide to a thickness of less than 1 micron.

[0068] Add 7 grams of composite particle powder into a mold with an outer diameter of 20 mm and an inner diameter of 12 mm, at a normal temperature of 20 tons / cm 2 Pressed under a certain pressure, and then heat-treated at 560° C. for 30 minutes in an Ar gas atmosphere to obtain a nanocrystalline core. The properties of this nanocrystalline core are listed in Table 3, i.e. density, crack situation, saturation magnetic flux density, effective perme...

Embodiment approach B-4

[0077] Carry out the preferred embodiment B-4 under the same conditions as the preferred embodiment B-1, the difference is that the pressing pressure is 40 tons / cm 2 .

[0078] Preferred Embodiment B-5

[0079] Carry out the preferred embodiment B-5 under the same conditions as the preferred embodiment B-3, the difference is that the pressing pressure is 40 tons / cm 2 .

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PUM

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Abstract

A method for manufacturing an amorphous alloy core, which is to mix amorphous alloy powder with a solution obtained by dissolving polyimide/phenol resin as a binder in an organic solvent, so that the binder is evenly coated on the alloy On the powder surface, the composite particle powder is prepared, shaped and heat-treated. There is also a method for manufacturing a nanocrystalline alloy core, comprising (a) mixing amorphous alloy powder with a solution obtained by dissolving polyimide/phenol resin as a binder in an organic solvent, so that the binder is uniformly coated coating on the surface of the alloy powder to obtain a composite particle powder, forming at room temperature and heat-treating above the crystallization initiation temperature; and (b) heat-treating the amorphous alloy powder above the crystallization initiation temperature to obtain a nanocrystalline phase, Mix it with the polyimide/phenolic resin as a binder in an organic solvent solution, so that the binder is evenly coated on the surface of the alloy powder, and the composite particle powder is obtained. Shape it.

Description

technical field [0001] The invention relates to an amorphous alloy powder core with excellent high-frequency performance and a nanocrystalline alloy powder core with excellent soft magnetic performance in a high-frequency band, and also relates to a method for preparing the two powder cores. More specifically, the present invention relates to a method of manufacturing an amorphous alloy powder core having excellent high-frequency performance using a very small amount (compared with conventional crystalline magnetic cores) of polyimide resin or phenolic resin as a binder Agent, carried out at low temperature compression, can increase the yield. The present invention also relates to a method of making nanocrystalline alloy powder cores with good saturation magnetic flux density and effective permeability by heat treating amorphous alloy powder or amorphous alloy powder cores above the crystallization initiation temperature. Background technique [0002] In general, soft magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/00C22C38/00H01F1/22
CPCH01F1/15333
Inventor 金圭镇
Owner 未来素材公司
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