CN109439987A - Superelevation thermal conductivity aligns graphene magnesium base alloy, preparation method and device - Google Patents
Superelevation thermal conductivity aligns graphene magnesium base alloy, preparation method and device Download PDFInfo
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- CN109439987A CN109439987A CN201811633803.5A CN201811633803A CN109439987A CN 109439987 A CN109439987 A CN 109439987A CN 201811633803 A CN201811633803 A CN 201811633803A CN 109439987 A CN109439987 A CN 109439987A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 72
- 239000011777 magnesium Substances 0.000 title claims abstract description 60
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 59
- 239000000956 alloy Substances 0.000 title claims abstract description 43
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000002844 melting Methods 0.000 claims abstract description 38
- 230000008018 melting Effects 0.000 claims abstract description 36
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 230000005291 magnetic effect Effects 0.000 claims abstract description 11
- 150000002739 metals Chemical class 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 238000003723 Smelting Methods 0.000 claims abstract description 5
- 238000004321 preservation Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 38
- 239000007789 gas Substances 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 239000011572 manganese Substances 0.000 claims description 8
- 229910052712 strontium Inorganic materials 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- 239000011135 tin Substances 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 3
- 229910000914 Mn alloy Inorganic materials 0.000 claims description 2
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims description 2
- 238000007499 fusion processing Methods 0.000 claims description 2
- KBMLJKBBKGNETC-UHFFFAOYSA-N magnesium manganese Chemical compound [Mg].[Mn] KBMLJKBBKGNETC-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 239000011159 matrix material Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000048 melt cooling Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910000882 Ca alloy Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- -1 graphite alkene Chemical class 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000005426 magnetic field effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to field of material technology, and be related to superelevation thermal conductivity aligns graphene magnesium base alloy, preparation method and preparation facilities.The graphene magnesium base alloy provided by the invention that aligns is made of the graphene nanometer sheet of magnesium alloy substrate and distribution in the base, and wherein graphene nanometer sheet aligns in the base.The present invention also provides preparation methods, comprising the following steps: (1) by graphene, magnesium and doping metals alloy mixed smelting；(2) after the graphene alloy melt cooling that melting mixes, heat preservation and magnetic field, internal graphene oriented alignment, superelevation thermal conductivity is obtained after resolidification aligns graphene magnesium base alloy.It is produced by the present invention to align graphene magnesium base alloy, it is aligned in magnesium alloy substrate using the diamagnetism of two-dimensional graphene, to improve the high thermal conductivity of material, while the chemical activity of magnesium can be reduced using graphene.
Description
Technical field
The invention belongs to field of material technology, are related to oriented graphite alkene material, and in particular to the orientation of superelevation thermal conductivity is arranged
Column graphene magnesium base alloy, preparation method and device.
Background technique
With the development that modern industry makes rapid progress, heat management is carried out to the thermal component of equipment, improves the heat dissipation of material
Performance gradually draws attention.Magnesium alloy is produced as structural metallic materials most light at present, magnesium and magnesium alloy than resin, plastics
Product perfect heat-dissipating can give full play to for manufacturing shell, the components of the intensive electronic product of element or electronic product
Its advantage to radiate.The heat dissipation performance of its components also has been a great concern at present.
The thermal coefficient of pure magnesium is 158W/mK, is only second to fine copper and fine aluminium in common metal structural material, therefore
Certain pairs of heat dissipation performances, mechanical property and lightweight have the field of particular/special requirement, and magnesium and magnesium alloy have special advantages for development,
Such as 3C Product, automobile engine and high-power LED radiator, the magnesium-alloy material in these fields are faced with heat-sinking capability not
The problem of foot.Further, since the chemical property of magnesium is very active, surface can be slowly oxidized in air, form fine and close oxidation
Object film and reduce heating conduction.Therefore, whether magnesium alloy is possible to replace widely applied aluminium alloy heat radiator, depends on magnesium and closes
Can the thermal conductivity of gold be improved, and its chemical activity is reduced.
Summary of the invention
It is an object of the invention to overcome drawbacks described above of the existing technology, aligning for superelevation thermal conductivity is proposed
The preparation method of graphene magnesium base alloy, for improving the heating conduction and chemical stability of magnesium alloy materials.
The present invention, which is that the following technical solution is employed, to be realized:
A kind of superelevation thermal conductivity aligns graphene magnesium base alloy, by the stone of magnesium alloy substrate and distribution in the base
Black alkene nanometer sheet composition, wherein graphene nanometer sheet aligns in the base.
Specifically, magnesium alloy substrate is made of magnesium and doping metals, doping metals include zinc, tin, calcium, strontium, aluminium, manganese or
One or more of magnesium-manganese alloy, magnesium-calcium alloy.
The present invention provides a kind of preparation method for aligning graphene magnesium base alloy of above-mentioned superelevation thermal conductivity, including with
Lower step:
(1) graphene, magnesium and doping metals are weighed by mass percentage, and melting mixes in protective atmosphere, quiet after mixing
It sets；
(2) after the graphene magnesium alloy fused mass cooling mixed melting made from step (1), heat preservation and magnetic field, then
Solidification, obtain superelevation thermal conductivity aligns graphene magnesium base alloy.
Wherein, the mass fraction of graphene, doping metals and magnesium is respectively in step (1), graphene be 1.0wt%~
5.0wt%, zinc is 0.5wt%~3.5wt%, tin is 0.5wt%~4.0wt%, calcium is 0.16wt%~1.5wt%, strontium is
0.02wt%~1.5wt%, aluminium are 0.1wt%~1.0wt%, manganese is 0.1wt%~0.5wt%, and surplus is magnesium, the above component
The sum of mass percent is 100%.
Fusion process in above-mentioned steps (1), smelting temperature are 730 DEG C~740 DEG C, and smelting time is 1~3 hour, protection
Gas is argon gas, nitrogen or carbon dioxide.
Holding temperature is 670 DEG C~700 DEG C in above-mentioned steps (2), and soaking time is 3~5min；Magnetic field is strong in step (2)
Degree is 0.1~5T.
The present invention also provides a kind of preparation facilities for aligning graphene magnesium base alloy of above-mentioned superelevation thermal conductivity, including
High temperature melting furnace, foundry furnace, high temperature melting furnace and foundry furnace are connected by discharge pipe；
The high temperature melting furnace is connected to vacuum pump, and connecting pipe is equipped with vavuum pump valve；High melt furnace interior is set
There is melting kettle, melting kettle periphery is equipped with heater, and inside is inserted with the blender of vertical hanging；Blender by transmission shaft with
Stirring motor connection, stirring motor are located at high temperature melting furnace top center；
Crucible, induction coil, the gentle cold dish of heater are equipped with inside the foundry furnace；The line of induction is wound with outside crucible wall
Circle is equipped with heater between crucible and induction coil；It is fitted closely at the top of crucible bottom and discoid air cooling disk；
Described discharge nozzle one end is connected to melting kettle bottom, and junction is provided with valve, and the other end is connected to foundry furnace,
It is opened on above crucible interior；Discharge pipe periphery is enclosed with insulating layer.
The insulating layer is by Al2O3Ceramic blankets are made, Al2O3Ceramic blankets with a thickness of 30~60mm.
The air cooling disk side is equipped with air cooling disk gas outlet, and bottom centre is equipped with air cooling disk air inlet；It is gas-cooled in disk inner cavity
Equipped with spiral air cooling partition, the coiling distribution in the shape of a spiral centered on being gas-cooled disk air inlet in air cooling disk.
The present invention has diamagnetism using graphene, and the characteristic of oriented alignment, and benefit can be achieved under directional magnetic field effect
It is hot with the ultra-high conducting in graphene face, graphene nanometer sheet is added during preparing magnesium alloy, by stirring its point
It dissipates, then increases directional magnetic field, evenly dispersed graphene is under the action of directional magnetic field, the row of orientation in magnesium alloy fused mass
Cloth, in the magnesium alloy for preparing ultra-high conducting heating rate by way of unidirectional solidification.
Compared with prior art, the beneficial effect that the present invention obtains is:
What the present invention proposed a kind of superelevation thermal conductivity aligns graphene magnesium base alloy and preparation method, closes preparing magnesium
Two-dimensional graphene material is added in the process of gold, and applies the magnetic field of high-strength directional distribution, utilizes the diamagnetic of two-dimensional graphene
Property aligns it in magnesium alloy substrate, to improve the high thermal conductivity of material, while can reduce magnesium using graphene
Chemical activity, so that the chemical stability of magnesium in magnesium alloy be substantially improved.
Detailed description of the invention
Fig. 1 is the preparation facilities use state diagram in a better embodiment of the invention；
Fig. 2 is the air cooling dish structure schematic diagram of the preparation facilities in a better embodiment of the invention；
In figure respectively mark it is as follows: 1 high temperature melting furnace, 2 vavuum pump valves, 3 vacuum pumps, 4 gas atmosphere inlets, 5 feed openings,
6 stirring motors, 7 transmission shafts, 8 blenders, 9 melting kettles, 10 heaters, 11 graphene magnesium alloy fused mass, 12 valves, 13 heat preservations
Layer, 14 foundry furnaces, 15 induction coils, 16 crucibles, 17 align graphene magnesium base alloy, 18 heaters, 19 air cooling disk outlets
Mouth, 20 air cooling disks, 21 air cooling disk air inlets, 22 spirals air cooling partition, 23 discharge pipes.
Specific embodiment
Method of the invention is illustrated below by specific embodiment, but the present invention is not limited thereto.
Experimental method described in following embodiments is unless otherwise specified conventional method；The reagent and material,
Using analytical reagents, unless otherwise specified, commercially obtain.
Embodiment
It as shown in Figure 1 and Figure 2, is the preparation facilities for aligning graphene magnesium base alloy of the present embodiment, comprising:
High temperature melting furnace 1, foundry furnace 14, high temperature melting furnace 1 and foundry furnace 14 are connected by discharge pipe 23；
The high temperature melting furnace 1 is connected to vacuum pump 3, and connecting pipe is equipped with vavuum pump valve 2；In high temperature melting furnace 1
Portion is equipped with melting kettle 9, and 9 periphery of melting kettle is equipped with heater 10, and inside is inserted with the blender 8 of vertical hanging；Blender 8 is logical
It crosses transmission shaft 7 to connect with stirring motor 6, stirring motor 6 is located at 1 top center of high temperature melting furnace；
Crucible 16, induction coil 15, the gentle cold dish 20 of heater 18 are equipped with inside the foundry furnace 14；Outside 16 side wall of crucible
It is wound with induction coil 15, heater 18 is equipped between crucible 16 and induction coil 15；16 bottom of crucible and discoid air cooling
Disk 20 fits closely；
Described 23 one end of discharge nozzle is connected to 9 bottom of melting kettle, and junction is provided with valve 12, the other end and foundry furnace
14 connections, are opened on above 16 inner cavity of crucible；17 periphery of discharge pipe is enclosed with insulating layer 13.
The insulating layer 13 is by Al2O3Ceramic blankets are made, Al2O3Ceramic blankets with a thickness of 30~60mm.
20 periphery of air cooling disk is equipped with air cooling disk gas outlet 19, and center is equipped with air cooling disk air inlet 21, is gas-cooled in disk 20
Spiral air cooling partition 22 is equipped in chamber, in the shape of a spiral to periphery in air cooling disk 20 after entering air-flow from air cooling disk air inlet 21
Flowing, finally outflow air cooling disk gas outlet 19.Enter air-flow from air cooling 20 bottom centre of disk, divides along spiral air cooling partition 22
The helical channel being separated out circulates in air cooling 20 inner cavity of disk, finally flows out from the air cooling disk gas outlet 19 of air cooling 20 side of disk.
The preparation method for aligning graphene magnesium base alloy of the present embodiment is based on Fig. 1, preparation facilities shown in Fig. 2,
Specifically includes the following steps:
(1) magnesium is put into the melting kettle 9 in high temperature melting furnace 1, starting vacuum pump 3 is true to taking out in high temperature melting furnace 1
Sky closes valve 2 as 0.5~5.0Pa of its vacuum degree, opens valve 4 and starts to be filled with protective gas into high temperature melting furnace 1
(one of argon gas, nitrogen or carbon dioxide gas) closes valve 4 when 1 atmospheric pressure value of high temperature melting furnace is standard atmospheric pressure
With vacuum pump 3.
(2) temperature in high temperature melting furnace 1 is increased as 730 DEG C~740 DEG C and is kept the temperature 0.5~1.5h by heater 10,
Pure metal Zn, Sn, Al, Sr, graphene nanometer sheet and Mg-15wt%Mn, Mg-10wt%Ca alloy cpd are preheated simultaneously
To 550 DEG C~600 DEG C, when pure magnesium all melts, doping metals alloy and graphene are added into crucible 9 by feed opening 5,
Control material quality ratio is that Zn is 0.5~3.5wt%, and Sn is 0.5~4.0wt%, and Ca is 0.16~1.5wt%, Sr 0.02
~1.5wt%, Al are 0.1~1.0wt%, and Mn is 0.1~0.5wt%, and graphene is 1.0~5.0wt%, remaining is Mg.Together
When open stirring motor 6, by transmission shaft 7 drive blender 8 graphene magnesium alloy fused mass 11 is stirred, keep temperature not
Become 1~3h of stir-melting, is subsequently agitated for after skimming and standing 15~30 minutes, melt temperature is transferred to 700 DEG C~720 DEG C.
(3) magnetic field of vertical direction distribution is generated by induction coil 15, magnetic field strength is 0.1~5T, by foundry furnace 14
In the temperature of heater 18 be set as 670 DEG C~700 DEG C, valve 12 will be opened after the temperature in foundry furnace 14 is stablized to be stirred
Uniform graphene magnesium alloy fused mass 11 releases along discharge pipe 23 and enters the iron crucible 16 in foundry furnace 14, discharge pipe 23
Outside is kept the temperature using insulating layer 13, is solidified in discharge pipe 23 to prevent graphene magnesium alloy fused mass 11.By foundry furnace 14
In 670 DEG C~700 DEG C 3~5min of heat preservation of temperature, so that graphene oriented alignment in the melt.
(4) power of the heater 18 in foundry furnace 14 is reduced to zero, through air cooling disk air inlet 21 into air cooling disk 20
It is passed through the air that temperature is room temperature, and passes through 19 outflow air cooling disk 20 of air cooling disk outlet, 100~200L/min of airflow rate.It should
Process can make melt realize one direction solidification, and what which obtained aligns 17 built-in thermal stress of graphene magnesium base alloy
It is small, fine and close, defect is few.
The present embodiment is described in detail below by specific embodiment.
Embodiment 1
The step of preparation aligns graphene magnesium base alloy is as follows:
First to high melt stove evacuation, it is filled with argon gas into high temperature furnace after exhausting vacuum to 1.5Pa, pure magnesium is put into molten
Refine crucible in, then high melt in-furnace temperature increase be 735 DEG C, keep the temperature 1h after, by be preheated to 550 DEG C pure metal Zn,
Sn, Al, Sr, graphene nanometer sheet and Mg-15wt%Mn, Mg-10wt%Ca alloy cpd are added in pure Serum Magnesium.It is molten
Refine each component mass percent in crucible are as follows: Zn 2.5wt%, Sn 3.5wt%, Ca 0.5wt%, Sr 1.0wt%, Al
For 0.5wt%, Mn 0.2wt%, graphene 3.5wt%, surplus is pure magnesium.Stir-melting and the 1h that skims, subsequent static 15
After~30 minutes, graphene alloy melt temperature is transferred to 700 DEG C；The magnetic field size in foundry furnace crucible region is set as 0.5T,
The alloy melt stirred evenly is poured into the iron crucible that temperature is 690 DEG C and keeps the temperature 5min.Then by foundry furnace internal heat generation body
Power be set as zero, while to being passed through air at room temperature, airflow rate 100mL/min, when the temperature in foundry furnace in air cooling disk
100 DEG C or so are down to, can be obtained and align graphene magnesium base alloy；
And the magnesium base alloy of graphene is not added as a comparison using the preparation of identical technological parameter, and to its thermal conductivity and
Heat dissipation effect is tested, test result are as follows: the thermal conductivity for being not added with the magnesium base alloy of graphene is 102W/ (mK), is passed through
Salt mist experiment test, corrosion resistance 4.08gm-2·d-1, tensile strength 271MPa, yield strength 161MPa；Addition
The thermal conductivity for aligning graphene magnesium base alloy of graphene is 142W/ (mK), is tested by salt mist experiment, corrosion resistance
For 4.72gm-2·d-1, tensile strength 298MPa, yield strength 184MPa.
Test result shows to add graphene of the magnesium alloy of graphene due to inside containing directional profile, greatly improve
The thermal conductivity of magnesium base alloy to improve heat-sinking capability, since graphene is to the chemically active reduction of magnesium-based, increases magnesium
The corrosion resistance of based alloy, and the intensity of magnesium base alloy is improved to a certain extent.
Certainly, above content is only presently preferred embodiments of the present invention, be should not be construed as limiting to implementation of the invention
Example range.The present invention is also not limited to the example above, and those skilled in the art are in essential scope of the invention
Interior made all the changes and improvements etc., should all belong in patent covering scope of the invention.
Claims (9)
1. a kind of superelevation thermal conductivity aligns graphene magnesium base alloy, which is characterized in that by magnesium alloy substrate and be distributed in
Graphene nanometer sheet composition in matrix, wherein graphene nanometer sheet aligns in the base.
2. superelevation thermal conductivity according to claim 1 aligns graphene magnesium base alloy, which is characterized in that the magnesium
Alloy substrate is made of magnesium and doping metals, and the doping metals include zinc, tin, calcium, strontium, aluminium, manganese or magnesium-manganese alloy, magnesium-calcium
One or more of alloy.
3. a kind of preparation method for aligning graphene magnesium base alloy of superelevation thermal conductivity, which is characterized in that including following step
It is rapid:
(1) graphene, magnesium and doping metals are weighed by mass percentage, and melting mixes in protective atmosphere, stands after mixing；
(2) after the graphene magnesium alloy fused mass cooling mixed melting made from step (1), heat preservation and magnetic field, resolidification,
Obtain superelevation thermal conductivity aligns graphene magnesium base alloy.
4. the preparation method for aligning graphene magnesium base alloy of superelevation thermal conductivity according to claim 3, feature
Be, the mass fraction of graphene, doping metals and magnesium is respectively in the step (1), graphene be 1.0wt%~
5.0wt%, zinc is 0.5wt%~3.5wt%, tin is 0.5wt%~4.0wt%, calcium is 0.16wt%~1.5wt%, strontium is
0.02wt%~1.5wt%, aluminium are 0.1wt%~1.0wt%, manganese is 0.1wt%~0.5wt%, and surplus is magnesium, the above component
The sum of mass percent is 100%.
5. the preparation method for aligning graphene magnesium base alloy of superelevation thermal conductivity according to claim 3, feature
It is, fusion process in the step (1), smelting temperature is 730 DEG C~740 DEG C, and smelting time is 1~3 hour, protective gas
For argon gas, nitrogen or carbon dioxide.
6. the preparation method for aligning graphene magnesium base alloy of superelevation thermal conductivity according to claim 3, feature
It is, holding temperature is 670 DEG C~700 DEG C in the step (2), and soaking time is 3~5min；Magnetic field strength in step (2)
For 0.1~5T.
7. a kind of preparation facilities for aligning graphene magnesium base alloy of superelevation thermal conductivity, which is characterized in that including high temperature melting
Furnace (1), foundry furnace (14), high temperature melting furnace (1) and foundry furnace (14) are connected by discharge pipe (23)；
The high temperature melting furnace (1) is connected to vacuum pump (3), and connecting pipe is equipped with vavuum pump valve (2)；High temperature melting furnace
(1) internal to be equipped with melting kettle (9), melting kettle (9) periphery is equipped with heater (10), and inside is inserted with the blender of vertical hanging
(8)；Blender (8) is connect by transmission shaft (7) with stirring motor (6), and stirring motor (6) is located at the top of high temperature melting furnace (1)
Center；
Crucible (16), induction coil (15), heater (18) gentle cold dish (20) are equipped with inside the foundry furnace (14)；Crucible
(16) it is wound with induction coil (15) outside side wall, is equipped with heater (18) between crucible (16) and induction coil (15)；Crucible
(16) it is fitted closely at the top of bottom and discoid air cooling disk (20)；
Described discharge nozzle (23) one end is connected to melting kettle (9) bottom, and junction is provided with valve (12), the other end and casting
Furnace (14) connection, is opened on above crucible (16) inner cavity；Discharge pipe (17) periphery is enclosed with insulating layer (13).
8. the preparation facilities for aligning graphene magnesium base alloy of superelevation thermal conductivity according to claim 7, feature
It is, the insulating layer (13) is by Al2O3Ceramic blankets are made, Al2O3Ceramic blankets with a thickness of 30~60mm.
9. the preparation facilities for aligning graphene magnesium base alloy of superelevation thermal conductivity according to claim 7, feature
It is, the air cooling disk (20) side is equipped with air cooling disk gas outlet (19), and bottom centre is equipped with air cooling disk air inlet (21)；Air cooling
Spiral air cooling partition (22) is equipped in disk (20) inner cavity, in air cooling disk (20) centered on being gas-cooled disk air inlet (21) helically
Shape coiling distribution.
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| CN113005313A (en) * | 2021-02-23 | 2021-06-22 | 太原理工大学 | Preparation method of configuration design pre-dispersed graphene nanosheet reinforced magnesium-based composite material |
| CN114300635A (en) * | 2021-12-27 | 2022-04-08 | 深圳市华星光电半导体显示技术有限公司 | Display device and method for manufacturing the same |
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