CN111347054A - Magnetic powder composite material and preparation method thereof - Google Patents
Magnetic powder composite material and preparation method thereof Download PDFInfo
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- CN111347054A CN111347054A CN201811571472.7A CN201811571472A CN111347054A CN 111347054 A CN111347054 A CN 111347054A CN 201811571472 A CN201811571472 A CN 201811571472A CN 111347054 A CN111347054 A CN 111347054A
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- 239000002131 composite material Substances 0.000 title claims abstract description 53
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 76
- 239000002184 metal Substances 0.000 claims abstract description 76
- 239000000843 powder Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- -1 iron-silicon-aluminum Chemical compound 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 4
- 235000014347 soups Nutrition 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 29
- 239000011261 inert gas Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 229910000702 sendust Inorganic materials 0.000 claims description 3
- 239000002905 metal composite material Substances 0.000 abstract description 20
- 238000010146 3D printing Methods 0.000 abstract description 3
- 230000003116 impacting effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 22
- 238000007747 plating Methods 0.000 description 14
- 238000000889 atomisation Methods 0.000 description 9
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000011259 mixed solution Substances 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910002796 Si–Al Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000011156 metal matrix composite Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/16—Metallic particles coated with a non-metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
Abstract
The invention relates to a preparation method of a magnetic powder composite material, which comprises the following steps: providing a magnetic metal melt, and dripping the magnetic metal melt downwards; introducing a high-speed composite gas into a path for dripping the magnetic metal molten soup; and collecting the magnetic powder composite material formed by impacting and crushing the magnetic metal melt by the high-speed atomizing gas. The magnetic powder composite material prepared by the preparation method of the magnetic powder composite material has the structure that: the magnetic metal powder is made of iron-silicon-aluminum metal; and the insulating layer coating film is made of silicon oxide and is coated on the surfaces of the magnetic metal powder. The preparation method of the invention omits the working procedure of post-treatment, pollution and loss: the magnetic metal composite material prepared by the invention can be directly pressed or prepared into a finished product through 3D printing without powder post-treatment.
Description
Technical Field
The present invention relates to a composite material and a method for preparing the same, and more particularly, to a magnetic powder composite material and a method for preparing the same.
Background
Metal Matrix Composites (MMCs) combine the properties of two different materials to ameliorate the disadvantages of conventional single materials by complementing each other's defects. The properties of the invention are determined by the characteristics of the substrate material and the cladding material, the substrate material mainly comprises metal or alloy with magnetism, and the cladding material plated on the surface mainly has insulating property.
The magnetic metal composite material in the field of the invention is prepared by adopting a powder metallurgy process, and the raw materials mainly comprise magnetic metal powder and an insulating medium. The uniformly distributed gaps exist among the metal powder with magnetism in the magnetic metal composite material, and the existence of the gaps enables the magnetic metal composite material to have a series of performances superior to other soft magnetic materials, such as high resistivity, low loss and the like.
The preparation process of the magnetic metal composite material mainly comprises four steps: the preparation of the magnetic metal powder, the insulation coating of the magnetic metal powder, the press forming and the heat treatment process. The factors influencing the magnetic performance of the magnetic metal composite material mainly include: the chemical components and the shape and the particle size distribution of the magnetic metal powder, the insulating coating condition of the magnetic metal powder, the type and the dosage of a binder, the type and the dosage of a release agent, the size of molding pressure, the heat treatment temperature and time and the like.
In the atomization powder preparation and insulation coating, a good process for solving the problems of powder oxidation and pollution is not provided at present, and passivation and insulation by using acid liquor not only pollutes the magnetic metal powder, but also has the doubt on environmental protection; if organic resin is adopted to carry out insulation coating on the residues after the heat treatment and the coating process, such as: it is also a challenge to coat a single powder to avoid agglomeration.
Disclosure of Invention
Accordingly, the present invention is directed to a magnetic powder composite material and a method for preparing the same, in which the coating of an insulating layer is directly performed by an atomization process, thereby overcoming the problems of the magnetic metal composite material such as contamination and insulation coating in the process.
In order to achieve the above object, the present invention discloses a method for preparing a magnetic powder composite material, comprising:
providing a magnetic metal melt, and dripping the magnetic metal melt downwards;
introducing a high-speed composite gas into a path for dripping the magnetic metal molten soup; and
collecting the magnetic metal melt, and crushing the magnetic metal melt by the high-speed composite gas impact to form a magnetic powder composite material.
In one embodiment, the magnetic metal melt is a sendust melt.
In one embodiment, the high-speed composite gas comprises an inert gas and a liquid.
In the above embodiment, the liquid is ethyl silicate alcohol solution.
In the above embodiment, the concentration of the ethyl silicate alcohol solution is between 25% and 85%.
In one embodiment, the high-speed composite gas comprises an inert gas and a reaction-assisting gas.
In the above embodiment, the gas for assisting the reaction is carbon dioxide.
In one embodiment, the high-speed composite gas comprises an inert gas and a solid powder.
In the above embodiment, the solid powder is a ceramic powder.
In one embodiment, the magnetic powder composite material prepared by the preparation method of the magnetic powder composite material has a structure comprising:
the magnetic metal powder is made of iron-silicon-aluminum metal; and
and the insulating layer coating film is made of silicon oxide and is coated on the surfaces of the magnetic metal powder.
The preparation method of the magnetic metal composite material and the magnetic metal composite material prepared by the method have the following advantages:
1. the atomization coating of the magnetic metal powder is completed at one time: directly coating the magnetic metal melt liquid by using supersonic high-speed compound gas in the process of crushing the magnetic metal melt liquid to form an insulating layer coated with magnetic metal powder;
2. the thickness of the plated film can be adjusted by the concentration of the insulating layer plating solution: the thickness of the coating film can be changed by adjusting the gasification point by controlling the concentration of the plating solution of the insulating layer;
3. reducing the amount of atomizing inert gas: the steam pressure of the insulating layer plating solution during gas formation can assist the use amount of inert gas, so that the atomization cost is reduced;
4. the process, pollution and loss of post-treatment are saved: the magnetic metal composite material prepared by the invention can be directly pressed or prepared into a finished product through 3D printing without powder post-treatment.
Drawings
FIG. 1 is a flow chart of a method for preparing a magnetic metal composite material according to the present invention;
FIG. 2 is a schematic view of an apparatus for preparing a magnetic metal composite according to the present invention;
fig. 3 is a schematic structural diagram of the magnetic metal composite material according to the present invention.
Wherein:
1-magnetic metal melt;
2-high speed composite gas; 21-inert gas; 22-a liquid;
3-a magnetic powder composite; 30-magnetic metal powder; 31-coating an insulating layer;
S1-S3-preparation steps of magnetic powder composite material.
Detailed Description
In order to make the aforementioned and other objects, features and characteristics of the present invention comprehensible, embodiments accompanied with the figures are described in detail below.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for manufacturing a magnetic metal composite according to an embodiment of the present invention, including the steps of:
step S1: providing a magnetic metal melt, and dripping the magnetic metal melt downwards;
step S2: introducing a high-speed composite gas into a path for dripping the magnetic metal molten soup; and
step S3: collecting the magnetic metal melt, and crushing the magnetic metal melt by the high-speed composite gas impact to form a magnetic powder composite material.
Please refer to FIG. 2, FIG. 2 is a schematic diagram of an apparatus for preparing a magnetic metal composite according to the present invention.
As shown in fig. 2, a magnetic metal melt 1 is provided, the magnetic metal melt 1 is maintained in a liquid state by heating a container periphery of the magnetic metal melt 1 to maintain a temperature of the magnetic metal melt 1 by a heating coil, and the magnetic metal melt 1 is dropped downward through a vertical pipe.
Introducing a high-speed composite gas 2 into a dropping path of the magnetic metal melt 1, wherein the high-speed composite gas 2 is impacted and crushed from the left side and the right side towards the magnetic metal melt 1 in a horizontal pipeline manner as shown in fig. 2, so as to achieve the effect of atomizing the metal melt into powder; and, the high-speed composite gas 2 is formed by mixing an insulating layer plating solution (liquid 22) in advance in a horizontal pipe using an inert gas 21, so that an insulating layer plating film can be formed on the surfaces of the metal melt powders while impact-crushing the magnetic metal melt 1 and atomizing it into metal powders.
And finally, collecting a magnetic powder composite material 3 formed by the magnetic metal melt 1 being impacted and crushed by the high-speed composite gas 2, wherein the structure of the magnetic powder composite material 3 is the magnetic metal powder 30 serving as a metal base and an insulating layer coating 31 (shown in fig. 3) coated on the surface of the magnetic metal powder 30.
In one embodiment, the magnetic metal melt 1 is a sendust melt.
In one embodiment, the high-speed composite gas 2 includes an inert gas 21 and a liquid 22.
In the above embodiment, the liquid 22 is an insulator plating solution.
In the above embodiment, the insulating layer plating solution is ethyl silicate alcohol solution.
In the above embodiment, the ethyl silicate alcohol solution has a concentration of 25 to 85 wt%.
In the embodiment of the present invention, the atomization coating of the magnetic metal melt 1 can be completed in one step during the process of being broken by the high-speed composite gas 2, i.e. the supersonic high-speed composite gas 2 (such as carrying nano SiO)2Of the precursor solutionInert gas) is added to the magnetic metal melt 1, the magnetic metal melt 1 is directly coated in the process of crushing the magnetic metal melt 1, and an insulating layer coating film (such as nano SiO) coated with magnetic metal powder is formed2A film).
In an embodiment of the present invention, the magnetic metal composite material is prepared by using a silicon-aluminum-iron (Fe-Si-Al) metal powder as a metal base: nano SiO used as insulating layer plating solution2The solution is 60L of ethyl silicate alcohol solution with the weight percentage concentration of 65 percent; the Fe-Si-Al metal molten liquid is prepared by the following steps of: 85% -90%, Si: 10% -12%, Al: 35Kg of 2 to 5 percent of the mixture is prepared. The iron-silicon-aluminum metal melting liquid and the powder making parameters are as follows: melting temperature: 1500-1800 ℃; preheating temperature of the bearing crucible: 1400-1700 ℃; the inner diameter of the outlet of the flow guide pipe is as follows: 5-8 mm; initial atomization pressure: 30 to 50kg/cm2(ii) a Gas flow rate: 5 to 10M3Min; ethyl silicate alcohol solution flow rate: 8-12L/min; atomization powder preparation time: 3-8 min.
In one embodiment, the thickness of the insulating layer plating film can be adjusted by controlling the concentration of the insulating layer plating solution (nano SiO)2The precursor solution is tetraethoxysilane/alcohol mixed solution), and the evaporation point is adjusted to further change the thickness of the coating.
The magnetic metal composite material prepared by the preparation method can reduce the using amount of the atomized inert gas because the inert gas and the insulating layer fluid are mixed in the high-speed composite gas in the preparation process, and can reduce the atomizing cost because the steam pressure of the insulating layer plating solution (tetraethoxysilane/alcohol mixed solution) can assist the using amount of the inert gas (namely, the using amount of the inert gas) when forming gas, and the preparation method can finish the film coating operation at the same time of atomizing, so the working procedure, pollution and loss of post-treatment can be saved.
In one embodiment, the high-speed composite gas comprises an inert gas and a reaction-assisting gas.
In the above embodiment, the gas for assisting the reaction is carbon dioxide.
In one embodiment, the high-speed composite gas comprises an inert gas and a solid powder.
In the above embodiment, the solid powder is a ceramic powder.
Referring to fig. 3, the magnetic powder composite material 3 prepared by the method of the present invention has a structure including: the magnetic metal powder 30 is made of iron-silicon-aluminum metal; and an insulating layer coating 31, wherein the insulating layer coating 31 is made of silicon oxide and is coated on the surface of the magnetic metal powder 30 made of iron, silicon and aluminum.
In summary, the preparation method of the magnetic metal composite material and the magnetic metal composite material prepared by the method have the following advantages: 1. the atomization and the film coating of the magnetic metal powder are completed at one time: high-speed composite gas (carrying nano SiO) using supersonic speed2The precursor solution) directly coating the magnetic metal melt during the process of crushing the magnetic metal melt to form an insulating layer (such as nano SiO) coating the magnetic metal powder2A film); 2. the thickness of the plated film can be adjusted by the concentration of the insulating layer plating solution: can be controlled by controlling the concentration of the plating solution of the insulating layer (nano SiO)2The precursor solution is tetraethoxysilane/alcohol mixed solution), the thickness of the coating film is changed by adjusting the gasification point; 3. reducing the amount of atomizing inert gas: the steam pressure of the insulating layer plating solution (tetraethoxysilane/alcohol mixed solution) during gas formation can assist the consumption of inert gas, so that the atomization cost is reduced; 4. the process, pollution and loss of post-treatment are saved: the magnetic metal composite material prepared by the invention can be directly pressed or prepared into a finished product through 3D printing without powder post-treatment.
The embodiments or examples of the technical means used in the present invention are not intended to limit the scope of the present invention. The scope of the invention is to be determined by the following claims and their equivalents.
Claims (10)
1. A method of preparing a magnetic powder composite, comprising:
providing a magnetic metal melt, and dripping the magnetic metal melt downwards;
introducing a high-speed composite gas into a path for dripping the magnetic metal molten soup; and
collecting the magnetic metal melt, and crushing the magnetic metal melt by the high-speed composite gas impact to form a magnetic powder composite material.
2. The method of making a magnetic powder composite of claim 1, wherein the magnetic metal melt is a sendust melt.
3. The method of claim 1, wherein the high velocity composite gas comprises an inert gas and a liquid.
4. The method of preparing a magnetic powder composite material according to claim 3, wherein the liquid is an ethyl silicate alcohol solution.
5. The method of preparing a magnetic powder composite material according to claim 4, wherein the ethyl silicate alcohol solution has a concentration of 25 to 85%.
6. The method of claim 1, wherein the high velocity composite gas comprises an inert gas and a reaction assisting gas.
7. The method of preparing a magnetic powder composite of claim 6, wherein the reaction-assisting gas is carbon dioxide.
8. The method of claim 1, wherein the high velocity composite gas comprises an inert gas and a solid powder.
9. The method of making a magnetic powder composite of claim 8, wherein the solid powder is a ceramic powder.
10. A magnetic powder composite material produced by the method for producing a magnetic powder composite material according to claim 1, characterized in that the structure thereof comprises:
the magnetic metal powder is made of iron-silicon-aluminum metal; and
and the insulating layer coating film is made of silicon oxide and is coated on the surfaces of the magnetic metal powder.
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| CN201811571472.7A CN111347054A (en) | 2018-12-21 | 2018-12-21 | Magnetic powder composite material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114369762A (en) * | 2022-01-07 | 2022-04-19 | 鞍钢股份有限公司 | Composite magnetic metal powder material and preparation method and application thereof |
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Application publication date: 20200630 |