CN115927979A - High-strength aluminum alloy material for 3C electronics and preparation method thereof - Google Patents
High-strength aluminum alloy material for 3C electronics and preparation method thereof Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 75
- 239000000956 alloy Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000012528 membrane Substances 0.000 claims abstract description 146
- 239000000919 ceramic Substances 0.000 claims abstract description 90
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 68
- 239000000835 fiber Substances 0.000 claims abstract description 46
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 43
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000009987 spinning Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 238000001354 calcination Methods 0.000 claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- 238000005266 casting Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000002791 soaking Methods 0.000 claims abstract description 10
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 30
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 30
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 30
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 20
- 229910017604 nitric acid Inorganic materials 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- XNDZQQSKSQTQQD-UHFFFAOYSA-N 3-methylcyclohex-2-en-1-ol Chemical compound CC1=CC(O)CCC1 XNDZQQSKSQTQQD-UHFFFAOYSA-N 0.000 claims description 12
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 claims description 12
- JGDITNMASUZKPW-UHFFFAOYSA-K aluminium trichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Al](Cl)Cl JGDITNMASUZKPW-UHFFFAOYSA-K 0.000 claims description 12
- 229940009861 aluminum chloride hexahydrate Drugs 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 10
- 229910052749 magnesium Inorganic materials 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 9
- 238000007731 hot pressing Methods 0.000 claims description 8
- 230000005684 electric field Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention provides a preparation method of a high-strength aluminum alloy material for 3C electrons, which comprises the following steps: s1, taking a resin plate as a material, designing geometric units of a regular triangle or a regular polygon, and taking adjacent geometric units as groove channels to obtain an electrostatic spinning receiving plate; s2, preparing an alumina sol spinning solution; s3, performing electrostatic spinning on the solution prepared in the step S2, and obtaining an aluminum sol fiber membrane through electrostatic spinning by taking the resin plate prepared in the step S1 as an electrostatic spinning receiving plate; s4, drying the alumina sol fiber membrane to obtain a ceramic membrane preform; s5, preparing a graphene solution; s6, soaking the ceramic membrane preform prepared in the step S4 in the graphene solution prepared in the step S5, taking out the ceramic membrane preform, and calcining the ceramic membrane preform to obtain a ceramic membrane; and S7, placing the ceramic membrane prepared in the step S6 in a casting mould to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material. The invention adopts a one-step casting molding method to prepare the aluminum alloy material for the 3C electronic product, has simple process and can be used for industrialized production.
Description
Technical Field
The invention relates to the technical field of high-performance aluminum alloy composite materials, in particular to a high-strength aluminum alloy material for 3C electronics and a preparation method thereof.
Background
With the development of communication and digital technologies, 3C products (also called portable electronic products, such as mobile phones, PADs, notebook computers, etc.) are continuously upgraded and updated in a short period of several decades, and become a miniature of technological progress. And the casing of portable electronic product bears the harm that reduces accidental dropping and cause it, reduces the dust, prolongs its life's function, and its appearance and feel more can promote user's product experience. Therefore, the material for manufacturing the portable electronic product shell is required to have the characteristics of high strength, good appearance, good heat conduction and heat resistance, stable size and the like. At present, 3C product shells are developed towards the trend of light weight and thin wall, and in order to better play the roles of heat dissipation, protection and beauty, the materials and the machining and forming process of the 3C product shells need to reach higher standards.
Aluminum-magnesium alloy is commonly used for manufacturing the shell in aluminum alloy materials, the aluminum alloy materials commonly used at present are used as 3C electronic products and are usually extruded products, the preparation process is simple, but different processes can cause defects of surface spots, lines and the like, and the attractiveness of the surface is affected. Therefore, the workpiece needs to be cut off during processing, which results in waste of processing. The invention hopes to adopt a one-time casting molding method to prepare the aluminum alloy material of the electronic product meeting the use requirement.
Disclosure of Invention
The technical problem to be solved is as follows: the invention aims to provide a high-strength aluminum alloy material for 3C electronics, which is prepared by adopting a one-step casting molding method, has simple process and can be used for industrial production.
The technical scheme is as follows: the preparation method of the high-strength aluminum alloy material for 3C electrons is characterized by comprising the following steps of:
s1, preparing an electrostatic spinning receiving plate: the method comprises the following steps of designing geometric units of a regular triangle or a regular polygon by using a resin plate as a material, and obtaining an electrostatic spinning receiving plate by using adjacent geometric units as groove channels, wherein the diameter of a circumscribed circle of the triangle or the regular polygon is 5-9mm, and the groove channels are inverted triangle channels;
s2, preparing an alumina sol spinning solution: adding aluminum chloride hexahydrate and aluminum nitrate nonahydrate into a nitric acid solution, stirring uniformly, adding aluminum isopropoxide until the aluminum isopropoxide is completely dissolved, then adding aluminum powder, filtering after complete reaction, adding a polyvinylpyrrolidone solution, and stirring uniformly to obtain an aluminum sol spinning solution;
s3, preparing an electrostatic spinning membrane: performing electrostatic spinning on the solution prepared in the step S2, and taking the resin plate prepared in the step S1 as an electrostatic spinning receiving plate to obtain an aluminum sol fiber membrane through electrostatic spinning;
s4, preparing a fiber membrane of a geometric mechanism: carrying out hot-pressing setting on the alumina sol fiber membrane prepared in the step S3, and drying the alumina sol fiber membrane to obtain a ceramic membrane preform;
s5, preparing a graphene solution: preparing a polyvinylpyrrolidone solution, adding graphene, and performing ultrasonic shearing to obtain a graphene solution;
s6, preparation of a ceramic membrane: soaking the ceramic membrane preform prepared in the step S4 in the graphene solution prepared in the step S5, taking out the ceramic membrane preform, and calcining the ceramic membrane preform to obtain a ceramic membrane;
s7, preparing the high-strength aluminum alloy material: and (5) placing the ceramic membrane prepared in the step (S6) in a casting mould to perform pressure casting on an aluminum alloy solution to prepare the high-strength aluminum alloy material.
Preferably, the molar ratio of the aluminum chloride hexahydrate, the aluminum nitrate nonahydrate, the nitric acid and the aluminum powder in the step S2 is 1.
Preferably, in the step S3, the electrostatic spinning process is that the voltage of an electric field is 12-20kV, the distance between a spinning needle and a receiving plate is 10-18cm, and the feeding speed is 1.5-2.2mL/h.
Preferably, the hot pressing molding pressure in the step S4 is 10-20 MPa, the temperature is 80-100 ℃, and the dwell time is 90-120S.
Preferably, the polyvinylpyrrolidone solution in the step S5 is 0.3-0.8g/L.
Preferably, the concentration of the graphene in the polyvinylpyrrolidone solution in the step S5 is 3.5-10mg/L.
Preferably, the calcination process in step S6 is: firstly heating to 400 ℃, calcining for 2-3h at 400 ℃, then heating to 750-800 ℃ at 2-3 ℃, and preserving heat for 0.5-1h.
Preferably, the aluminum alloy solution in step S6 has the composition of Zn, cu, si, ti, fe, mg and Al, wherein Zn, cu, mg, si, ti, fe and Mg account for 6.1-6.4%,0.01-0.02%,0.015-0.025%,0.2-0.3%,0.1-0.5%,2.2-2.5% by weight of the aluminum alloy solution, and the balance is Al.
The high-strength aluminum alloy material for 3C electrons prepared by the preparation method.
Has the beneficial effects that: the invention has the following advantages:
1. the invention adopts the fiber membrane reinforced aluminum alloy material, adopts the one-time casting molding method for preparation, has simple process and can realize industrialized production;
2. generating a gridded electrostatic spinning film on a templated grid through electrostatic spinning, wherein the gridded film can increase the stress transmission path, and the diameter of the circumscribed circle of the independent geometric unit needs to be controlled within a certain range, so that the mechanical property of the gridded film is also improved;
3. the grid grooves are inverted triangles, one surface of the top end of each triangle is a stress surface in the stress process, and the triangles are beneficial to force transmission and reduce the possibility of deformation of the aluminum alloy material;
4. the prepared ceramic membrane preform is soaked in a solution containing graphene, and graphene is contained on the surface and inside of the ceramic membrane, so that the graphene can be uniformly distributed in an aluminum alloy material, and the mechanical property is further improved.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
The preparation method of the high-strength aluminum alloy material for 3C electrons comprises the following steps:
s1, preparing an electrostatic spinning receiving plate: the method comprises the following steps of carving regular triangles on a resin plate by taking the resin plate as a material, and taking adjacent geometric units as groove channels to obtain an electrostatic spinning receiving plate, wherein the diameter of a circumscribed circle of each triangle is 9mm, and the groove channels are inverted triangle channels;
s2, preparing an alumina sol spinning solution: adding 1mol of aluminum chloride hexahydrate and 1mol of aluminum nitrate nonahydrate into 1L of nitric acid solution, wherein the concentration of nitric acid is 1mol/L, stirring uniformly, adding 2mol of aluminum isopropoxide to completely dissolve, then adding 4mol of aluminum powder, filtering after complete reaction to obtain transparent solution, adding 0.5g/L of polyvinylpyrrolidone solution, and stirring uniformly to obtain an aluminum sol spinning solution, wherein the volume ratio of the two solutions is 1;
s3, preparing an electrostatic spinning membrane: carrying out electrostatic spinning on the solution prepared in the step S2, wherein the spinning voltage is 12kV, the distance between a spinning needle and a receiving plate is 10cm, the inner diameter of a needle head is 1.2mm, the feeding speed is 2.2mL/h, the resin plate prepared in the step S1 is used as an electrostatic spinning receiving plate, and an aluminum sol fiber membrane is obtained through electrostatic spinning;
s4, preparing a geometrical mechanism fiber membrane: carrying out hot-press forming on the alumina sol fiber membrane prepared in the step S3, wherein the hot-press forming pressure is 10MPa, the temperature is 100 ℃, the pressure maintaining time is 90S, and drying the alumina sol fiber membrane to obtain a ceramic membrane preform;
s5, preparing a graphene solution: preparing a polyvinylpyrrolidone solution with the concentration of 0.3g/L, adding graphene with the concentration of 3.5mg/L in the polyvinylpyrrolidone solution, and carrying out ultrasonic shearing to obtain a graphene solution;
s6, preparation of a ceramic membrane: soaking the ceramic membrane preform prepared in the step S4 in the graphene solution prepared in the step S5, taking out the ceramic membrane preform, calcining the ceramic membrane preform, heating the ceramic membrane preform to 400 ℃, calcining the ceramic membrane preform for 2 hours at 400 ℃, heating the ceramic membrane preform to 800 ℃ at 3 ℃, and keeping the temperature for 1 hour to obtain a ceramic membrane;
s7, preparing the high-strength aluminum alloy material: and (4) placing the ceramic membrane prepared in the step (S6) in a casting mould to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material, wherein the Zn, cu, mg, si, ti, fe and Mg account for 6.1%,0.01%,0.025%,0.2%,0.5%,2.5% and the balance of Al in percentage by weight of the aluminum alloy solution.
Example 2
The preparation method of the high-strength aluminum alloy material for 3C electrons comprises the following steps:
s1, preparing an electrostatic spinning receiving plate: the method comprises the following steps of carving squares on a resin plate by taking the resin plate as a material, wherein the adjacent squares are groove channels, so that an electrostatic spinning receiving plate is obtained, the diameter of a circumscribed circle of each square is 5mm, and each groove channel is an inverted triangular channel;
s2, preparing an alumina sol spinning solution: adding 1mol of aluminum chloride hexahydrate and 1mol of aluminum nitrate nonahydrate into 1L of nitric acid solution, wherein the concentration of nitric acid is 1mol/L, stirring uniformly, adding 2mol of aluminum isopropoxide to completely dissolve, then adding 4mol of aluminum powder, filtering after complete reaction to obtain a transparent solution, adding a polyvinylpyrrolidone solution with the concentration of 0.8g/L, wherein the volume ratio of the two solutions is 1.2, and stirring uniformly to obtain an aluminum sol spinning solution;
s3, preparing an electrostatic spinning membrane: carrying out electrostatic spinning on the solution prepared in the step S2, wherein the spinning voltage is 20kV, the distance between a spinning needle and a receiving plate is 18cm, the inner diameter of a needle head is 1.2mm, the feeding speed is 1.5mL/h, the resin plate prepared in the step S1 is used as an electrostatic spinning receiving plate, and an aluminum sol fiber membrane is obtained through electrostatic spinning;
s4, preparing a geometrical mechanism fiber membrane: carrying out hot-press forming on the alumina sol fiber membrane prepared in the step S3, wherein the hot-press forming pressure is 20 MPa, the temperature is 100 ℃, the pressure maintaining time is 90S, and drying the alumina sol fiber membrane to obtain a ceramic membrane preform;
s5, preparing a graphene solution: preparing a polyvinylpyrrolidone solution with the concentration of 0.8g/L, adding graphene with the concentration of 10mg/L in the polyvinylpyrrolidone solution, and carrying out ultrasonic shearing to obtain a graphene solution;
s6, preparation of a ceramic membrane: soaking the ceramic membrane preform prepared in the step S4 in the graphene solution prepared in the step S5, taking out the ceramic membrane preform, calcining the ceramic membrane preform, heating the ceramic membrane preform to 400 ℃, calcining the ceramic membrane preform for 3 hours at 400 ℃, heating the ceramic membrane preform to 750 ℃ at 2 ℃, and keeping the temperature for 0.5 hour to obtain a ceramic membrane;
s7, preparing the high-strength aluminum alloy material: and (4) placing the ceramic membrane prepared in the step (S6) in a casting mould to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material, wherein the Zn, cu, mg, si, ti, fe and Mg account for 6.4 wt%, 0.02 wt%, 0.015 wt%, 0.3 wt%, 0.1 wt%, 2.2 wt% and the balance of Al.
Example 3
The preparation method of the high-strength aluminum alloy material for 3C electrons comprises the following steps:
s1, preparing an electrostatic spinning receiving plate: the method comprises the following steps of carving regular pentagons on a resin plate by taking the resin plate as a material, wherein adjacent regular pentagons are groove channels, so that the electrostatic spinning receiving plate is obtained, the diameter of a circumscribed circle of each regular pentagon is 5mm, and the groove channels are inverted triangular channels;
s2, preparing an alumina sol spinning solution: adding 1mol of aluminum chloride hexahydrate and 1mol of aluminum nitrate nonahydrate into 1L of nitric acid solution, wherein the concentration of nitric acid is 1mol/L, stirring uniformly, adding 2mol of aluminum isopropoxide to completely dissolve, then adding 4mol of aluminum powder, filtering after complete reaction to obtain a transparent solution, adding a polyvinylpyrrolidone solution with the concentration of 0.5g/L, and stirring uniformly to obtain an alumina sol spinning solution, wherein the volume ratio of the two solutions is 1;
s3, preparing an electrostatic spinning membrane: carrying out electrostatic spinning on the solution prepared in the step S2, wherein the spinning voltage is 18kV, the distance between a spinning needle and a receiving plate is 15cm, the inner diameter of a needle head is 1.2mm, the feeding speed is 1.8mL/h, the resin plate prepared in the step S1 is used as an electrostatic spinning receiving plate, and an aluminum sol fiber membrane is obtained through electrostatic spinning;
s4, preparing a fiber membrane of a geometric mechanism: carrying out hot-pressing setting on the alumina sol fiber membrane prepared in the step S3, wherein the hot-pressing setting pressure is 12 MPa, the temperature is 100 ℃, the pressure maintaining time is 90S, and drying the alumina sol fiber membrane to obtain a ceramic membrane preform;
s5, preparing a graphene solution: preparing a polyvinylpyrrolidone solution with the concentration of 0.5g/L, adding graphene with the concentration of 5mg/L in the polyvinylpyrrolidone solution, and carrying out ultrasonic shearing to obtain a graphene solution;
s6, preparation of a ceramic membrane: soaking the ceramic membrane preform prepared in the step S4 in the graphene solution prepared in the step S5, taking out the ceramic membrane preform, calcining the ceramic membrane preform, firstly heating the ceramic membrane preform to 400 ℃, calcining the ceramic membrane preform for 2 hours at 400 ℃, then heating the ceramic membrane preform to 800 ℃ at 2 ℃, and preserving the heat for 0.5 hour to obtain a ceramic membrane;
s7, preparing the high-strength aluminum alloy material: and (3) placing the ceramic membrane prepared in the step (S6) in a casting mold to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material, wherein the weight percentages of Zn, cu, mg, si, ti, fe and Mg in the aluminum alloy solution are 6.2%,0.02%,0.015%,0.25%,0.4%,2.4% and the balance of Al.
Example 4
The preparation method of the high-strength aluminum alloy material for 3C electrons comprises the following steps:
s1, preparing an electrostatic spinning receiving plate: the method comprises the following steps of carving triangles on a resin plate serving as a material, wherein the adjacent triangles are groove channels to obtain the electrostatic spinning receiving plate, the diameter of a circumscribed circle of each triangle is 8mm, and the groove channels are inverted triangle channels;
s2, preparing an alumina sol spinning solution: adding 1mol of aluminum chloride hexahydrate and 1mol of aluminum nitrate nonahydrate into 1L of nitric acid solution, wherein the concentration of nitric acid is 1mol/L, stirring uniformly, adding 2mol of aluminum isopropoxide to completely dissolve, then adding 4mol of aluminum powder, filtering after complete reaction to obtain a transparent solution, adding a polyvinylpyrrolidone solution with the concentration of 0.6g/L, and stirring uniformly to obtain an alumina sol spinning solution, wherein the volume ratio of the two solutions is 1;
s3, preparing an electrostatic spinning membrane: carrying out electrostatic spinning on the solution prepared in the step S2, wherein the spinning voltage is 15kV, the distance between a spinning needle and a receiving plate is 12cm, the inner diameter of a needle head is 1.2mm, the feeding speed is 2.0mL/h, the resin plate prepared in the step S1 is used as an electrostatic spinning receiving plate, and an aluminum sol fiber membrane is obtained through electrostatic spinning;
s4, preparing a fiber membrane of a geometric mechanism: carrying out hot-press forming on the alumina sol fiber membrane prepared in the step S3, wherein the hot-press forming pressure is 18 MPa, the temperature is 80 ℃, the pressure maintaining time is 120S, and drying the alumina sol fiber membrane to obtain a ceramic membrane preform;
s5, preparing a graphene solution: preparing a polyvinylpyrrolidone solution with the concentration of 0.75g/L, adding graphene with the concentration of 8mg/L in the polyvinylpyrrolidone solution, and carrying out ultrasonic shearing to obtain a graphene solution;
s6, preparation of a ceramic membrane: soaking the ceramic membrane preform prepared in the step S4 in the graphene solution prepared in the step S5, taking out the ceramic membrane preform, calcining the ceramic membrane preform, heating the ceramic membrane preform to 400 ℃, calcining the ceramic membrane preform for 3 hours at 400 ℃, heating the ceramic membrane preform to 750 ℃ at 3 ℃, and keeping the temperature for 1 hour to obtain a ceramic membrane;
s7, preparing a high-strength aluminum alloy material: and (4) placing the ceramic membrane prepared in the step (S6) in a casting mould to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material, wherein the Zn, cu, mg, si, ti, fe and Mg account for 6.3%,0.01%,0.02%,0.3%,0.4%,2.3% and the balance of Al in percentage by weight of the aluminum alloy solution.
Comparative example 1
The preparation method of the high-strength aluminum alloy material for 3C electrons comprises the following steps:
s1, preparing an electrostatic spinning receiving plate: preparing an electrostatic spinning receiving plate by taking a blank traceless resin plate as a material;
s2, preparing an alumina sol spinning solution: adding 1mol of aluminum chloride hexahydrate and 1mol of aluminum nitrate nonahydrate into 1L of nitric acid solution, wherein the concentration of nitric acid is 1mol/L, stirring uniformly, adding 2mol of aluminum isopropoxide to completely dissolve, then adding 4mol of aluminum powder, filtering after complete reaction to obtain a transparent solution, adding a polyvinylpyrrolidone solution with the concentration of 0.5g/L, and stirring uniformly to obtain an alumina sol spinning solution, wherein the volume ratio of the two solutions is 1;
s3, preparing an electrostatic spinning membrane: carrying out electrostatic spinning on the solution prepared in the step S2, wherein the spinning voltage is 18kV, the distance between a spinning needle and a receiving plate is 15cm, the inner diameter of a needle head is 1.2mm, the feeding speed is 1.8mL/h, the resin plate prepared in the step S1 is used as an electrostatic spinning receiving plate, and an aluminum sol fiber membrane is obtained through electrostatic spinning;
s4, preparing a fiber membrane of a geometric mechanism: carrying out hot-press forming on the alumina sol fiber membrane prepared in the step S3, wherein the hot-press forming pressure is 12 MPa, the temperature is 100 ℃, the pressure maintaining time is 90S, and drying the alumina sol fiber membrane to obtain a ceramic membrane preform;
s5, preparing a graphene solution: preparing a polyvinylpyrrolidone solution with the concentration of 0.5g/L, adding graphene with the concentration of 5mg/L in the polyvinylpyrrolidone solution, and carrying out ultrasonic shearing to obtain a graphene solution;
s6, preparation of a ceramic membrane: soaking the ceramic membrane preform prepared in the step S4 in the graphene solution prepared in the step S5, taking out the ceramic membrane preform, calcining the ceramic membrane preform, firstly heating the ceramic membrane preform to 400 ℃, calcining the ceramic membrane preform for 2 hours at 400 ℃, then heating the ceramic membrane preform to 800 ℃ at 2 ℃, and preserving the heat for 0.5 hour to obtain a ceramic membrane;
s7, preparing the high-strength aluminum alloy material: and (3) placing the ceramic membrane prepared in the step (S6) in a casting mold to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material, wherein the weight percentages of Zn, cu, mg, si, ti, fe and Mg in the aluminum alloy solution are 6.2%,0.02%,0.015%,0.25%,0.3%,2.4% and the balance of Al.
Comparative example 2
The preparation method of the high-strength aluminum alloy material for 3C electrons comprises the following steps:
s1, preparing an electrostatic spinning receiving plate: the method comprises the following steps of carving a triangle on a resin plate serving as a material, wherein adjacent geometric units are groove channels, so that an electrostatic spinning receiving plate is obtained, wherein the diameter of a circumscribed circle of the triangle is 5mm, and the groove channels are inverted triangle channels;
s2, preparing an alumina sol spinning solution: adding 1mol of aluminum chloride hexahydrate and 1mol of aluminum nitrate nonahydrate into 1L of nitric acid solution, wherein the concentration of nitric acid is 1mol/L, stirring uniformly, adding 2mol of aluminum isopropoxide to completely dissolve, then adding 4mol of aluminum powder, filtering after complete reaction to obtain transparent solution, adding 0.5g/L of polyvinylpyrrolidone solution, and stirring uniformly to obtain an aluminum sol spinning solution, wherein the volume ratio of the two solutions is 1;
s3, preparing an electrostatic spinning membrane: performing electrostatic spinning on the solution prepared in the step S2, wherein the spinning voltage is 18kV, the distance between a spinning needle and a receiving plate is 15cm, the inner diameter of a needle head is 1.2mm, the feeding speed is 1.8mL/h, the resin plate prepared in the step S1 is used as an electrostatic spinning receiving plate, and an aluminum sol fiber membrane is obtained through electrostatic spinning;
s4, preparing a fiber membrane of a geometric mechanism: carrying out hot-press forming on the alumina sol fiber membrane prepared in the step S3, wherein the hot-press forming pressure is 12 MPa, the temperature is 100 ℃, the pressure maintaining time is 90S, and drying the alumina sol fiber membrane to obtain a ceramic membrane preform;
s5, preparation of a ceramic membrane: calcining the ceramic membrane preform prepared in the step S4, heating to 400 ℃, calcining for 2 hours at 400 ℃, then heating to 800 ℃ at 2 ℃, and preserving heat for 0.5 hour to obtain a ceramic membrane;
s7, preparing the high-strength aluminum alloy material: and (4) placing the ceramic membrane prepared in the step (S6) in a casting mould to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material, wherein the Zn, cu, mg, si, ti, fe and Mg account for 6.2%,0.02%,0.015%,0.25%,0.3%,2.4% and the balance of Al in percentage by weight of the aluminum alloy solution.
Comparative example 3
The preparation method of the high-strength aluminum alloy material for 3C electrons comprises the following steps:
s1, preparing an electrostatic spinning receiving plate: the method comprises the following steps of carving triangles on a resin plate serving as a material, wherein adjacent triangles are groove channels, so that an electrostatic spinning receiving plate is obtained, the diameter of a circumscribed circle of each triangle is 8mm, and each groove channel is an inverted triangle channel;
s2, preparing an alumina sol spinning solution: adding 1mol of aluminum chloride hexahydrate and 1mol of aluminum nitrate nonahydrate into 1L of nitric acid solution, wherein the concentration of nitric acid is 1mol/L, stirring uniformly, adding 2mol of aluminum isopropoxide to completely dissolve, then adding 4mol of aluminum powder, filtering after complete reaction to obtain a transparent solution, adding a polyvinylpyrrolidone solution with the concentration of 0.6g/L, and stirring uniformly to obtain an alumina sol spinning solution, wherein the volume ratio of the two solutions is 1;
s3, preparing an electrostatic spinning membrane: carrying out electrostatic spinning on the solution prepared in the step S2, wherein the spinning voltage is 15kV, the distance between a spinning needle and a receiving plate is 12cm, the inner diameter of a needle head is 1.2mm, the feeding speed is 2.0mL/h, the resin plate prepared in the step S1 is used as an electrostatic spinning receiving plate, and an aluminum sol fiber membrane is obtained through electrostatic spinning;
s4; preparing a graphene solution: preparing a polyvinylpyrrolidone solution with the concentration of 0.75g/L, adding graphene with the concentration of 8mg/L in the polyvinylpyrrolidone solution, and carrying out ultrasonic shearing to obtain a graphene solution;
s5, preparation of a ceramic membrane: soaking the alumina sol fiber membrane prepared in the step S3 in the graphene solution prepared in the step S4, taking out the alumina sol fiber membrane, calcining the alumina sol fiber membrane, firstly heating the alumina sol fiber membrane to 400 ℃, calcining the alumina sol fiber membrane for 3 hours at the temperature of 400 ℃, then heating the alumina sol fiber membrane to 750 ℃ at the temperature of 3 ℃, and preserving the heat for 1 hour to obtain a ceramic membrane;
s6, preparing a high-strength aluminum alloy material: and (3) placing the ceramic membrane prepared in the step (S6) in a casting mold to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material, wherein the weight percentages of Zn, cu, mg, si, ti, fe and Mg in the aluminum alloy solution are 6.3%,0.01%,0.02%,0.3%,0.4%,2.3% and the balance of Al.
Comparative example 4
The preparation method of the high-strength aluminum alloy material for 3C electrons comprises the following steps:
s1, preparing an electrostatic spinning receiving plate: the method comprises the following steps of carving triangles on a resin plate serving as a material, wherein the adjacent triangles are groove channels to obtain the electrostatic spinning receiving plate, the diameter of a circumscribed circle of each triangle is 15mm, and the groove channels are inverted triangle channels;
s2, preparing an alumina sol spinning solution: adding 1mol of aluminum chloride hexahydrate and 1mol of aluminum nitrate nonahydrate into 1L of nitric acid solution, wherein the concentration of nitric acid is 1mol/L, stirring uniformly, adding 2mol of aluminum isopropoxide to completely dissolve, then adding 4mol of aluminum powder, filtering after complete reaction to obtain a transparent solution, adding a polyvinylpyrrolidone solution with the concentration of 0.6g/L, and stirring uniformly to obtain an alumina sol spinning solution, wherein the volume ratio of the two solutions is 1;
s3, preparing an electrostatic spinning membrane: performing electrostatic spinning on the solution prepared in the step S2, wherein the spinning voltage is 15kV, the distance between a spinning needle and a receiving plate is 12cm, the inner diameter of a needle head is 1.2mm, the feeding speed is 2.0mL/h, the resin plate prepared in the step S1 is used as an electrostatic spinning receiving plate, and an aluminum sol fiber membrane is obtained through electrostatic spinning;
s4, preparing a fiber membrane of a geometric mechanism: carrying out hot-pressing setting on the alumina sol fiber membrane prepared in the step S3, wherein the hot-pressing setting pressure is 18 MPa, the temperature is 80 ℃, the pressure maintaining time is 120S, and drying the alumina sol fiber membrane to obtain a ceramic membrane preform;
s5, preparing a graphene solution: preparing a polyvinylpyrrolidone solution with the concentration of 0.75g/L, adding graphene with the concentration of 8mg/L in the polyvinylpyrrolidone solution, and carrying out ultrasonic shearing to obtain a graphene solution;
s6, preparation of a ceramic membrane: soaking the ceramic membrane preform prepared in the step S4 in the graphene solution prepared in the step S5, taking out the ceramic membrane preform, calcining the ceramic membrane preform, heating the ceramic membrane preform to 400 ℃, calcining the ceramic membrane preform for 3 hours at 400 ℃, heating the ceramic membrane preform to 750 ℃ at 3 ℃, and keeping the temperature for 1 hour to obtain a ceramic membrane;
s7, preparing the high-strength aluminum alloy material: and (3) placing the ceramic membrane prepared in the step (S6) in a casting mold to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material, wherein the weight percentages of Zn, cu, mg, si, ti, fe and Mg in the aluminum alloy solution are 6.3%,0.01%,0.02%,0.3%,0.4%,2.3% and the balance of Al.
Table 1 shows the comparison of the properties of examples and comparative examples
| Hardness HB | Yield strength MPa | Tensile strength MPa | Elongation percentage% | |
| Example 1 | 156 | 421 | 469 | 13.5 |
| Example 2 | 152 | 432 | 471 | 12.5 |
| Example 3 | 155 | 425 | 478 | 12.6 |
| Example 4 | 149 | 436 | 468 | 12.0 |
| Comparative example 1 | 152 | 381 | 380 | 12.2 |
| Comparative example 2 | 158 | 375 | 412 | 13.2 |
| Comparative example 3 | 154 | 365 | 430 | 12.2 |
| Comparative example 4 | 152 | 382 | 422 | 12.5 |
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
- The preparation method of the high-strength aluminum alloy material for the 1.3C electrons is characterized by comprising the following steps of:s1, preparing an electrostatic spinning receiving plate: the method comprises the following steps of designing geometric units of a regular triangle or a regular polygon by using a resin plate as a material, and obtaining an electrostatic spinning receiving plate by using adjacent geometric units as groove channels, wherein the diameter of a circumscribed circle of the triangle or the regular polygon is 5-9mm, and the groove channels are inverted triangle channels;s2, preparing an alumina sol spinning solution: adding aluminum chloride hexahydrate and aluminum nitrate nonahydrate into a nitric acid solution, stirring uniformly, adding aluminum isopropoxide until the aluminum isopropoxide is completely dissolved, then adding aluminum powder, filtering after complete reaction, adding a polyvinylpyrrolidone solution, and stirring uniformly to obtain an aluminum sol spinning solution;s3, preparing an electrostatic spinning membrane: performing electrostatic spinning on the solution prepared in the step S2, and taking the resin plate prepared in the step S1 as an electrostatic spinning receiving plate to obtain an aluminum sol fiber membrane through electrostatic spinning;s4, preparing a fiber membrane of a geometric mechanism: carrying out hot-pressing setting on the alumina sol fiber membrane prepared in the step S3, and drying the alumina sol fiber membrane to obtain a ceramic membrane preform;s5, preparing a graphene solution: preparing a polyvinylpyrrolidone solution, adding graphene, and performing ultrasonic shearing to obtain a graphene solution;s6, preparation of a ceramic membrane: soaking the ceramic membrane preform prepared in the step S4 in the graphene solution prepared in the step S5, taking out the ceramic membrane preform, and calcining the ceramic membrane preform to obtain a ceramic membrane;s7, preparing a high-strength aluminum alloy material: and (5) placing the ceramic membrane prepared in the step (S6) in a casting mould to cast an aluminum alloy solution to prepare the high-strength aluminum alloy material.
- 2. The method for preparing a high-strength aluminum alloy material for 3C electronics according to claim 1, wherein the method comprises the following steps: in the step S2, the molar ratio of aluminum chloride hexahydrate, aluminum nitrate nonahydrate, nitric acid to aluminum powder is 1.
- 3. The method for preparing a high-strength aluminum alloy material for 3C electronics according to claim 1, wherein: in the step S3, the electrostatic spinning process is that the voltage of an electric field is 12-20kV, the distance between a spinning needle and a receiving plate is 10-18cm, and the feeding speed is 1.5-2.2mL/h.
- 4. The method for preparing a high-strength aluminum alloy material for 3C electronics according to claim 1, wherein: and in the step S4, the hot pressing setting pressure is 10-20 MPa, the temperature is 80-100 ℃, and the pressure maintaining time is 90-120S.
- 5. The method for preparing a high-strength aluminum alloy material for 3C electronics according to claim 1, wherein: and in the step S5, the polyvinylpyrrolidone solution is 0.3-0.8g/L.
- 6. The method for preparing a high-strength aluminum alloy material for 3C electronics according to claim 1, wherein: in the step S5, the concentration of the graphene in the polyvinylpyrrolidone solution is 3.5-10mg/L.
- 7. The method for preparing a high-strength aluminum alloy material for 3C electrons according to claim 1, wherein the calcination process in the step S6 is as follows: firstly heating to 400 ℃, calcining for 2-3h at 400 ℃, then heating to 750-800 ℃ at 2-3 ℃, and preserving heat for 0.5-1h.
- 8. The method for preparing a high-strength aluminum alloy material for 3C electronics according to claim 1, wherein: the components of the aluminum alloy solution in the step S6 are Zn, cu, si, ti, fe, mg and Al, wherein the Zn, cu, mg, si, ti, fe and Mg account for 6.1-6.4 wt% of the aluminum alloy solution, 0.01-0.02 wt%, 0.015-0.025 wt%, 0.2-0.3 wt%, 0.1-0.5 wt%, 2.2-2.5 wt%, and the balance is Al.
- 9. The high-strength aluminum alloy material for 3C electrons prepared by the preparation method according to any one of claims 1 to 8.
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| CN101392413A (en) * | 2008-10-30 | 2009-03-25 | 天津工业大学 | Novel waste and old easy open can recovery technology |
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| CN113151753A (en) * | 2021-01-19 | 2021-07-23 | 苏州创泰合金材料有限公司 | Reticular membrane reinforced aluminum-based material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101392413A (en) * | 2008-10-30 | 2009-03-25 | 天津工业大学 | Novel waste and old easy open can recovery technology |
| CN110983209A (en) * | 2019-12-13 | 2020-04-10 | 安徽验讯网络科技有限公司 | Preparation method of high-strength porous three-dimensional ceramic matrix metal composite material |
| CN111621921A (en) * | 2020-05-13 | 2020-09-04 | 明光市铭垚凹凸棒产业科技有限公司 | Attapulgite-reinforced alumina nanofiber membrane and preparation method thereof |
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