CN107779641A - A kind of preparation method of graphene aluminium alloy extrusions - Google Patents
A kind of preparation method of graphene aluminium alloy extrusions Download PDFInfo
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- CN107779641A CN107779641A CN201610727583.7A CN201610727583A CN107779641A CN 107779641 A CN107779641 A CN 107779641A CN 201610727583 A CN201610727583 A CN 201610727583A CN 107779641 A CN107779641 A CN 107779641A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
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Abstract
This application discloses a kind of preparation method of graphene aluminium alloy extrusions, comprise the following steps：(1) graphene and aluminium powder are ground using ball mill, the composite particles of graphene and aluminium powder are made, the particle diameter of composite particles is 3 5mm；(2) can be rolled compound as 0.5 1mm lamellar body；(3) it is liquid by aluminium alloy ingots heating and melting, turns into aluminium liquid, and stir；(4) lamellar body obtained by step (2) is added in the aluminium liquid in step (3), and be kept stirring for 0.5 1 hours；Then aluminium liquid is poured into a mould, obtains graphene aluminium alloy extrusions；In graphene aluminium alloy extrusions, the percentage by weight of graphene is 1 3%；The thickness of the graphene is 5 10nm, and the piece footpath of graphene is 2 20 microns.This method can be such that graphene uniform is distributed in the matrix of aluminium alloy well, form stable dispersion.
Description
Technical field
The present invention relates to a kind of preparation method of graphene aluminium alloy extrusions.
Background technology
Aluminium alloy is one of relatively broad structural metallic materials of current application amount, and it has good heat conductivility, together
When due to its proportion it is small, plasticity is strong, and processing characteristics is excellent, cheap, is widely used in heat sink of air conditioner, computer dissipates
The fields such as hot device, LED module radiating piece.Development however as electronic science and technology will to the heat dispersion of all kinds of radiating elements
More and more higher is sought, on the basis of it can meet easy processing shaping, improves its thermophysical property as far as possible.Wherein graphene just it is a kind of very
Good enhancing phase, graphene are a kind of one-dimensional carbon materials of perfect sp2 hydridization, and theoretical calculation shows that it has the thermal conductivity of superelevation
Rate (5000-6000W/m.K) and mechanical property, to lead new material development to enter brand-new visual angle.
But how to be distributed in aluminum substrate, currently used method is directly to put into graphene. by graphene uniform
Into the aluminium liquid of melting, then cast obtains the aluminium alloy extrusions containing graphene, but because graphene is powdered, and by
It is poor in the wetability of graphene and aluminium, after putting into aluminium liquid, even if using stirring, but because the viscosity of aluminium liquid is very big,
Graphene is still difficult to be uniformly dispersed in aluminium liquid, and part graphene can form reunion, declines the homogeneity of section bar performance.
The content of the invention
It is an object of the invention to provide a kind of preparation method of graphene aluminium alloy extrusions, this method can make well
Graphene uniform is distributed in the matrix of aluminium alloy, forms stable dispersion, in order to realize foregoing invention purpose, the present invention
Technical scheme specifically comprises the following steps used by adopting：
(1) graphene and aluminium powder are ground using ball mill, are made the composite particles of graphene and aluminium powder, compound
The particle diameter of grain is 3-5mm；
(2) by the compound lamellar body that can be rolled as 0.5-1mm；
(3) it is liquid by aluminium alloy ingots heating and melting, turns into aluminium liquid, and stir；
(4) lamellar body obtained by step (2) is added in the aluminium liquid in step (3), and is kept stirring for 0.5-1 hours；
Then aluminium liquid is poured into a mould, obtains graphene aluminium alloy extrusions；
In graphene aluminium alloy extrusions, the percentage by weight of graphene is 1-3%；The thickness of the graphene is 5-
10nm, the piece footpath of graphene is 2-20 microns.
Further, in the step (1), the weight ratio of graphene and aluminium powder is 1: 10-15.
Further, the technique that ball mill is ground is：300-500 revs/min of rotating speed, 5 hours time.
Further, the particle diameter of aluminium powder is 100-200 microns.
Further, the mixing speed in step (3) after aluminium alloy ingots heating and melting liquid is 100-150 revs/min.
Further, the temperature control of step (4) described cast is at 660-750 DEG C.
In the present invention, ball mill can efficiently reduce the volume of graphene when being ground to aluminium powder and graphene,
And using the plasticity of aluminium powder, graphene is bonded together with aluminium powder, forms the particle that aluminium powder and graphene mutually wrap up, so
Particle is rolled as sheet afterwards, after the complex of the graphene of these sheets and aluminium powder is put into aluminium liquid, these are compound
Body soon can be dispersed in aluminium liquid, be aluminium powder and stone because graphene is ground with aluminium powder in ball milling in advance
The wetability of black alkene is improved.Because graphene and aluminium powder are ground, and the amount of aluminium powder will substantially exceed graphene
Amount, makes graphene relatively rapid reach in aluminium liquid and is uniformly distributed, the thermal conductivity of resulting graphene aluminium alloy extrusions arrives
320-350W/mK.
Embodiment
Embodiment 1
By thickness be 5nm, piece footpath is 2 microns 5g graphenes, the pure aluminium powder ball mill for the 50g that particle diameter is 100 microns
It is ground, 300 revs/min of grinding rate, grinds 5 hours, obtain composite particles, be then rolled into 0.5mm lamellar body；So
After take 445g fine aluminiums to be heated to 660 DEG C to become liquid and stir, 100 revs/min of mixing speed, be then rolled into lamellar body by above-mentioned
Composite particles put into aluminium liquid, after continuing stirring 0.5 hour, cast obtains 1# graphene aluminium alloy extrusions, 1# after testing
The thermal conductivity of graphene aluminium alloy extrusions is 320W/mK.
Embodiment 2
By thickness be 10nm, piece footpath is 20 microns 5g graphenes, the pure aluminium powder ball milling for the 75g that particle diameter is 200 microns
Machine is ground, 500 revs/min of grinding rate, is ground 5 hours, is obtained composite particles, be then rolled into 1mm lamellar body；So
After take 86.7g fine aluminiums to be heated to 750 DEG C to become liquid and stir, 150 revs/min of mixing speed, then rolled above-mentioned in flakes
The composite particles of body are put into aluminium liquid, and after continuing stirring 1 hour, cast obtains 2# graphene aluminium alloy extrusions, after testing 1#
The thermal conductivity of graphene aluminium alloy extrusions is 350W/mK.
Embodiment 3
By thickness be 6nm, piece footpath is 10 microns 5g graphenes, the pure aluminium powder ball mill for the 60g that particle diameter is 120 microns
It is ground, 400 revs/min of grinding rate, grinds 5 hours, obtain composite particles, be then rolled into 0.6mm lamellar body；So
After take 158g fine aluminiums to be heated to 700 DEG C to become liquid and stir, 120 revs/min of mixing speed, be then rolled into lamellar body by above-mentioned
Composite particles put into aluminium liquid, after continuing stirring 0.8 hour, cast obtains 3# graphene aluminium alloy extrusions, 1# after testing
The thermal conductivity of graphene aluminium alloy extrusions is 330W/mK.
Claims (6)
1. a kind of preparation method of graphene aluminium alloy extrusions, it is characterised in that comprise the following steps：
(1) graphene and aluminium powder are ground using ball mill, the composite particles of graphene and aluminium powder is made, composite particles
Particle diameter is 3-5mm；
(2) by the compound lamellar body that can be rolled as 0.5-1mm；
(3) it is liquid by aluminium alloy ingots heating and melting, turns into aluminium liquid, and stir；
(4) lamellar body obtained by step (2) is added in the aluminium liquid in step (3), and is kept stirring for 0.5-1 hours；Then
Aluminium liquid is poured into a mould, obtains graphene aluminium alloy extrusions；
In graphene aluminium alloy extrusions, the percentage by weight of graphene is 1-3%；
The thickness of the graphene is 5-10nm, and the piece footpath of graphene is 2-20 microns.
2. preparation method according to claim 1, it is characterised in that in the step (1), the weight of graphene and aluminium powder
Than for 1: 10-15.
3. preparation method according to claim 1, it is characterised in that the technique that ball mill is ground is：Rotating speed 300-
500 revs/min, 5 hours time.
4. preparation method according to claim 1, it is characterised in that the particle diameter of aluminium powder is 100-200 microns.
5. preparation method according to claim 1, it is characterised in that in step (3) after aluminium alloy ingots heating and melting liquid
Mixing speed be 100-150 revs/min.
6. preparation method according to claim 1, it is characterised in that the temperature control of step (4) described cast is in 660-
750℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610727583.7A CN107779641A (en) | 2016-08-25 | 2016-08-25 | A kind of preparation method of graphene aluminium alloy extrusions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610727583.7A CN107779641A (en) | 2016-08-25 | 2016-08-25 | A kind of preparation method of graphene aluminium alloy extrusions |
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| CN107779641A true CN107779641A (en) | 2018-03-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182819A (en) * | 2018-09-17 | 2019-01-11 | 中南大学 | A kind of smelting preparation method of graphene enhancing almag |
| CN110331316A (en) * | 2019-07-02 | 2019-10-15 | 上海交通大学 | A kind of high-strength temperature-resistant graphene aluminium composite conductor material and preparation method |
| CN115466883A (en) * | 2021-06-10 | 2022-12-13 | 特变电工股份有限公司 | High-conductivity graphene aluminum alloy rod, preparation method thereof and high-conductivity graphene aluminum alloy stranded wire |
-
2016
- 2016-08-25 CN CN201610727583.7A patent/CN107779641A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182819A (en) * | 2018-09-17 | 2019-01-11 | 中南大学 | A kind of smelting preparation method of graphene enhancing almag |
| CN109182819B (en) * | 2018-09-17 | 2021-04-02 | 中南大学 | Smelting preparation method of graphene reinforced aluminum-magnesium alloy |
| CN110331316A (en) * | 2019-07-02 | 2019-10-15 | 上海交通大学 | A kind of high-strength temperature-resistant graphene aluminium composite conductor material and preparation method |
| CN110331316B (en) * | 2019-07-02 | 2021-05-14 | 上海交通大学 | High-strength heat-resistant graphene-aluminum composite conductor material and preparation method thereof |
| CN115466883A (en) * | 2021-06-10 | 2022-12-13 | 特变电工股份有限公司 | High-conductivity graphene aluminum alloy rod, preparation method thereof and high-conductivity graphene aluminum alloy stranded wire |
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