CN108925108A - The conductive structure and its manufacturing method of aluminium alloy are inlayed in a kind of graphene-based composite substrate - Google Patents
The conductive structure and its manufacturing method of aluminium alloy are inlayed in a kind of graphene-based composite substrate Download PDFInfo
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Abstract
The invention discloses the conductive structure and its manufacturing method of inlaying aluminium alloy in a kind of graphene-based composite substrate, the conductive structure includes graphene-based composite substrate and aluminium block body, wherein：The graphene-based composite substrate longitudinally punches, and the aluminium block body is embedded in the hole of graphene-based composite substrate.Steps are as follows for the method：1）It is longitudinally punched on graphene-based composite material；2）Prepare aluminium block body；3）Graphene-based composite material hole surface is subjected to surface metalation；4）Aluminium block body after surface polishing is subjected to copper coating；5）Copper facing aluminium block body is embedded in the hole of graphene-based composite substrate of surface metalation, the conductive structure for inlaying aluminium alloy in grapheme material substrate is obtained.Longitudinal heat transfer efficiency of graphene-based composite substrate can be greatly improved through the invention, to improve its whole radiating efficiency.
Description
Technical field
The invention belongs to design on material structure technical field, it is related to inlaying aluminium conjunction in a kind of graphene-based composite substrate
The conductive structure and its manufacturing method of gold.
Background technique
With the demand growth of device miniaturization and multifunction, the Highgrade integration of electronic device has become its development
Main trend.The power density that this also results in device is increasing, and the heat generated accordingly is more and more, if too late
When these heat losses are gone out, the temperature of device can be made to gradually rise, to generate to its reliability and service life important
Influence, especially in aerospace and national defence.Deep space probe, various satellites, nuclear reactor, aircraft, laser are military
The weaponrys such as device, guided missile are required to efficient heat sink material and structure.For example, it is following that nuclear energy, which is applied to spacecraft,
Development trend, advantages that nuclear energy has that small in size, light-weight, energy density is big etc., but at present for, the heat to electricity conversion of nuclear energy is imitated
Rate is not high, even if being designed using more advanced structure, heat to electricity conversion also can only achieve 19% or so.Under deep space environment,
Remaining heat can only be dispersed by way of heat transfer and space-ward heat radiation.In terms of weaponry, high energy laser weapon etc.
Instantaneously, heat spreader system lightweight problem restricts tactical mobility greatly, and high heat flow density hot issues restrict not in chip
Come equip micro-system development, demand of the Weapon Development to heat dissipation technology urgent.Using United States Air Force as the weaponry of representative
In, systematicness layout considers thermal management technology.In aerospace field, it is desirable that heat sink material or structure not only have height
Thermally conductive and high radiation, and take into account lightweight and good mechanical performance.
Traditional heat sink material and structure such as metal, graphite, heat pipe etc. or be exactly that density is too big or be exactly thermal conductivity
Rate is too low, there is " weight two is low "（Density is big, thermal conductivity is low, heat emissivity coefficient is low）Bottleneck problem, be no longer satisfied force
The development need of device equipment.And graphene is the two dimensional crystal material with superelevation thermal conductivity, has the single layer stone of perfect lattice
Thermal conductivity is up to ~ 5300W/ in black alkene face（m·K）, rare opportunity is provided to the development of heat sink material of new generation.Realize stone
Black alkene from receive see scale to macro property leap be solve heat dissipation problem a feasible approach.
Graphene itself is the material of high anisotropy, and thermal conductivity is less than 10W/ outside face（m·K）, prepare at present
Graphene-based heat sink material is substantially the material of graphene oriented alignment, because only that interface resistance could be reduced in this way, fills
Heating conduction in the excellent face of graphene is waved in distribution.However, this oriented alignment structure simultaneously results in graphene-based heat dissipation material
Material is very low along the direction thermal conductivity perpendicular to oriented alignment（1~30 W/m·K）, the heating conduction of this high anisotropy,
Heat is limited in the conduction of three-dimensional, and then the advantage of thermal conductivity in the high face of this kind of material can not be played.Therefore, to beating
Broken graphite alkenes heat sink material must find the method for improving vertical direction heat-sinking capability using bottleneck.
Summary of the invention
In order to solve the problems, such as above-mentioned graphene-based heat sink material longitudinal direction capacity of heat transmission lower limit, it integrates heat-sinking capability, this
Invention provides the conductive structure and its manufacturing method that aluminium alloy is inlayed in a kind of graphene-based composite substrate, can be significantly
Longitudinal heat transfer efficiency of graphene-based composite substrate is improved, to improve its whole radiating efficiency.
The purpose of the present invention is what is be achieved through the following technical solutions：
Inlay the conductive structure of aluminium alloy in a kind of graphene-based composite substrate, including graphene-based composite substrate and
Aluminium block body, wherein：
The graphene-based composite substrate longitudinally punches, and the position in the hole is in graphene-based composite substrate and heat source
Contact point on；
The aluminium block body is embedded in the hole of graphene-based composite substrate.
In the present invention, the height in the hole and the thickness of substrate are identical；The lateral section in hole is trapezoidal；The size and number in hole
It is determined according to the size and number of heat source, the quantity in hole can be one, be also possible to multiple；Hole knockout is CNC processing.
In the present invention, the graphene-based composite material be by matrix of graphene and graphene in material internal along graphite
Alkene lamella direction（X/Y plane）The three-dimensional material aligned.
In the present invention, the aluminium block body can be fine aluminium block, be also possible to that the Al alloy block of a small amount of other elements is added
Body；The lateral section of aluminium block body be it is trapezoidal, short transverse is identical with the thickness of graphene-based composite substrate, the number of quantity and hole
Amount is consistent.
A kind of manufacturing method of above-mentioned conductive structure, includes the following steps：
1）It is longitudinally punched on graphene-based composite material, specific step is as follows：
In the way of numerically-controlled machine tool or laser cutting, longitudinally punched on graphene-based composite substrate.
2）Aluminium block body is prepared, specific step is as follows：
Aluminium block body is prepared using numerically-controlled machine tool, wherein：The processing method of aluminium block body takes the mode of first wire cutting re-polishing；Aluminium block
There are the surpluses of 0.1 ~ 0.3mm on each surface of body, carry out surface polishing treatment；The upper bottom surface side ratio step 1 of aluminium block body）
Small 0.3 ~ the 0.5mm in the hole, the surplus as weld seam.
3）Surface metalation：By step 1）Obtained graphene-based composite material hole surface carries out surface metalation, specifically
Steps are as follows：
A, suitable Cr powder and SnAgCu eutectic powder are weighed with electronic balance, being mixed into Cr mass fraction is 7 ~ 11%
Then metallization powder is put into ball mill, with the speed of 80 ~ 100r/min by Sn0.3Ag0.7Cu-x%Cr metallization powder
8 ~ 12h of ball milling, obtains mixed metal powder；B, by binder and Sn0.3Ag0.7Cu-x%Cr metal powder with 1：1~1：2 body
Then product is coated in the hole surface of graphene-based composite substrate than mixing, be bonded one layer 20 ~ 50 in metal powder surface later
μm copper foil, graphite jig is put among hole later, gives mold certain pressure, makes copper foil and metallization powder and substrate
Hole surface generate closely combine；C, it is put into vacuum brazing furnace later to metallize, the technique of metallization is：Work as vacuum degree
Reach 10-3After Pa, 400 ~ 600 DEG C are raised to the heating rate of 10 ~ 30 DEG C/min, is raised to later with the rate of 5 ~ 15 DEG C/min
Specified metallizing temperature, in 940 ~ 960 DEG C of 20 ~ 30min of heat preservation；D, cooled down after heat preservation with the rate of 5 ~ 15 DEG C/min,
Furnace cooling after being down to 400 ~ 600 DEG C.
4）Plating：By step 2）Aluminium block body after obtained surface polishing carries out copper coating, coating with a thickness of 4 ~ 5 μ
m。
5）Welding：By step 4）Obtained copper facing aluminium block body is embedded in step 3）Obtained surface metalation it is graphene-based
In the hole of composite substrate, the conductive structure that aluminium alloy is inlayed in grapheme material substrate is obtained, specific step is as follows：
By step 4）Obtained copper facing aluminium block body is embedded in step 3 using the technology of welding）The graphene-based composite material
In the hole of substrate, for the solder used for Sn0.3Ag0.7Cu soldering paste, welding equipment is vacuum brazing furnace；It is clear to weld preceding acetone
The technique on the surface of clean welding body, welding is：When vacuum degree reaches 10-3After Pa, heated up with the heating rate of 10 ~ 20 DEG C/min
To 150 ~ 250 DEG C, continues to be warming up to 300 ~ 350 DEG C with the rate of 5 ~ 10 DEG C/min, 5 ~ 15min is kept the temperature, with furnace after heat preservation
Room temperature is cooled to get to the conductive structure for inlaying aluminium alloy in grapheme material substrate.
Above-mentioned each sequence of steps can change.
The present invention has the advantages that：
1, because thermal conductivity is high in the face of graphene-based heat sink material（Up to ~ 1500Wm-1K-1）And density is very low（1.5~
2.1g/cm3）, this has absolute advantage in terms of heat sink material.But its longitudinal thermal conductivity is low, so that heat is difficult from heat source
It is transferred on graphene radiator along longitudinal direction（Such as Fig. 1（a）It is shown）, graphene radiation material light high heat conducting is limited in this way
Advantage play.And can quickly spread out of heat onto aluminium alloy from heat source by means of the present invention, then again by thermal conductivity
The higher aluminium alloy of rate is transferred on graphene radiator, is conducted heat direction along the face of grapheme material, is given full play to
The advantage of this high starch breeding alkene cooling fin（Such as Fig. 1（b）It is shown）, high starch breeding alkenyl heat sink material is expanded significantly
Application range；And total aluminium alloy small volume, compared to the metal material of the high thermal conductivities such as copper, density is relatively low, full
The application requirement of sufficient field of aerospace.
2, the aluminium alloy of present invention selection wedge shape, can increase the contact area of aluminium alloy and graphene substrate, to have
It imitates to improve efficiency of thermal transfer.
3, the wetability of grapheme material and aluminium alloy difference and hot physical performance differs greatly, leads to graphene and aluminium alloy
Residual stress after welding is very big, so graphene and aluminum material directly welding difficult to realize.The present invention passes through grapheme material
Surface metalation, active element Cr is distributed in welding layer surface, wherein Cr and grapheme material can react, generate
Chromium carbide is conducive to improve weld strength in this way, while after aluminum alloy surface is carried out copper facing, by graphene and aluminium alloy
Welding is converted into the welding between copper and copper, solves the welding problem of graphene and aluminium.
4, for the material of anisotropic heat conductivity, the present invention, which can be used as, a kind of to be improved it and integrates the logical of the capacity of heat transmission
Use method.
Detailed description of the invention
Fig. 1 is the schematic diagram that the present invention improves the comprehensive capacity of heat transmission,（a）The conduction process of graphene-based composite substrate
Schematic diagram,（b）Conduction process schematic diagram of the invention；
Fig. 2 is the structural schematic diagram that the conductive structure of aluminium alloy is inlayed in grapheme material substrate of the present invention；
Fig. 3 is the Temperature Distribution in 1 test process of embodiment on sample,（a）The structure of aluminium alloy is inlayed in graphene substrate,
（b）Pure graphene substrate；
In figure：The graphene-based composite substrate of 1-, 2- graphene sheet layer, 3- heat source, 4- hot-fluid, 5- aluminum or aluminum alloy.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawing, and however, it is not limited to this, all to this
Inventive technique scheme is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered
Within the protection scope of the present invention.
Embodiment 1：
Present embodiments provide the manufacturing method that aluminium alloy is inlayed in a kind of graphene-based composite substrate, specific implementation step
It is as follows：
1）To select one piece of area be 200 × 150mm, with a thickness of the graphene-based composite material of 10mm, graphite in the composite material
Alkene accounts for 90v%, and copper accounts for 10v%, and graphene is along X/Y plane direction oriented alignment, and the plane thermal conductivity of substrate is ~ 1200W/
（m.K）, vertical direction thermal conductivity is ~ 5W/（m.K）.Using numerically-controlled machine tool and milling cutter, beaten on graphene-based composite substrate
One lateral section is trapezoidal through-hole, and the height in hole and the thickness of substrate are identical, and the size of hole upper surface is 15 × 15mm, following table
The size in face is 20 × 20mm, the center position of the position in hole in graphene substrate.
2）Prepare aluminium alloy block：6061 aluminiums are selected, prepare aluminium alloy block using the technique of numerically-controlled machine tool wire cutting,
There are the surpluses of 0.1mm on aluminium alloy each surface, carry out surface polishing treatment.The size of aluminium alloy is：Height is 10mm, upper table
The side length in face is 14.7 × 14.7mm, and the side length of lower surface is 19.7 × 19.7mm, lower surface and heat source contact.
3）Surface metalation：Suitable Cr powder and SnAgCu eutectic powder are weighed with electronic balance, is mixed into Cr mass
Metallization powder, is then put into ball mill, with 80r/min by the Sn0.3Ag0.7Cu-7%Cr metallization powder that score is 7%
Speed ball milling 8h, obtain mixed metal powder.By binder and Sn0.3Ag0.7Cu-7%Cr metal powder with 1：1 volume ratio
Mixing, is then coated in the hole surface of graphene substrate, one layer 20 μm of copper foil is bonded in metal powder surface later, later in hole
Centre is put into graphite jig, gives mold certain pressure, generates the hole surface of copper foil and metallization powder and substrate close
Combination.It is put into vacuum brazing furnace later to metallize, when vacuum degree reaches 10-3After Pa, with the heating speed of 10 DEG C/min
Degree is raised to 400 DEG C, is raised to 940 DEG C later with 5 DEG C/min, keeps the temperature 30min.Cooled down after heat preservation with the rate of 5 DEG C/min, drop
Furnace cooling after to 600 DEG C.
4）Plating：By the aluminium alloy obtained after surface polishing carry out copper coating, coating with a thickness of 4 ~ 5 μm.
5）Welding：Plating albronze is embedded in the hole of graphene-based composite material using the technology of welding, use
Solder is Sn0.3Ag0.7Cu soldering paste, and welding equipment is vacuum brazing furnace.With the surface of acetone cleaning welding body, welding before welding
Technique be：When vacuum degree reaches 10-3After Pa, 250 DEG C are warming up to the heating rate of 10 DEG C/min, is continued with 5 DEG C/min
Rate be warming up to 300 DEG C, keep the temperature 15min, be cooled to room temperature with furnace after heat preservation to get to a kind of grapheme material substrate
Inside inlay the conductive structure of aluminium alloy.
The present invention that Fig. 1 gives improves the principle of the whole capacity of heat transmission, for the graphene substrate of oriented structure（Fig. 1
（a））, longitudinal thermal conductivity is low to cause hot-fluid to be difficult in longitudinal conduction；The aluminium that structure of the invention passes through high thermal conductivity（Fig. 1（b））, make
Heat is quickly transmitted to longitudinal direction, to give full play to the capacity of heat transmission in the superelevation face of graphene substrate.
It is placed on the heat source of 250W using conductive structure manufactured in the present embodiment as soaking plate, heat source and aluminium alloy contact,
The test of practical heat dissipation effect is carried out on air-cooled test platform, the Temperature Distribution on sample is as shown in Figure 3.The result shows that this
Invention can make the temperature of heat source be reduced to 76.1 DEG C, and the temperature difference on sample is at 15.2 DEG C or so.And same technique is used,
Use simple graphene board as temperature-uniforming plate, heat source temperature is 94.6 DEG C, and temperature difference is at 30.8 DEG C or so on sample.Compared to next
It says, of the invention makes the temperature of heat source reduce 15.6 DEG C, and has better even temperature effect.And the present invention also have it is light
Advantage.Therefore, the present invention has huge application prospect in aerospace field.
Embodiment 2：
Present embodiments provide the manufacturing method that aluminium alloy is inlayed in a kind of graphene-based composite substrate, specific implementation step
It is as follows：
1）Selecting one piece of area is 200 × 150mm, with a thickness of the graphene composite material substrate of 10mm, which contains 15v%
Copper, remaining is graphene, and graphene is along X/Y plane direction oriented alignment, and the plane thermal conductivity of substrate is ~ 1100W/（m.K）,
Vertical direction thermal conductivity is ~ 5 ~ 7W/（m.K）.Using numerically-controlled machine tool and milling cutter, two are made a call on graphene-based composite substrate
Lateral section is trapezoidal hole, and the height in hole and the thickness of substrate are identical, and the size of one of hole upper surface is 15 × 15mm, under
The size on surface is 20 × 20mm, and having a size of 10 × 10mm, the size of lower surface is 25 × 25mm for the upper surface in another hole.
2）Prepare aluminium alloy block：6061 aluminiums are selected, prepare aluminium alloy block using the technique of numerically-controlled machine tool wire cutting,
There are the surpluses of 0.1mm on aluminium alloy each surface, carry out surface polishing treatment.The size of two aluminium alloy blocks is respectively：（1）
Height is 10mm, and the side length of upper surface is 14.7 × 14.7mm, and the side length of lower surface is 19.7 × 19.7mm,（2）Highly it is
10mm, the side length of upper surface are 9.7 × 9.7mm, and it is that lower surface and heat source connect that the side length of lower surface, which is 24.7 × 24.7mm,
Touching.
3）Surface metalation：Suitable Cr powder and SnAgCu eutectic powder are weighed with electronic balance, is mixed into Cr mass
Metallization powder, is then put into ball mill, with 80r/ by the Sn0.3Ag0.7Cu-11%Cr metallization powder that score is 11%
The speed ball milling 10h of min, obtains mixed metal powder.By binder and Sn0.3Ag0.7Cu-11%Cr metal powder with 1：1.5
Volume ratio mixing, be then coated in the hole surface of graphene substrate, be bonded one layer 50 μm of copper foil in metal powder surface later,
Graphite jig is put among hole later, gives mold certain pressure, makes the hole surface of copper foil and metallize powder and substrate
It generates and closely combines.It is put into vacuum brazing furnace later to metallize, when vacuum degree reaches 10-3After Pa, with 30 DEG C/min
Heating rate be raised to 400 DEG C, be raised to 960 DEG C later with 15 DEG C/min, keep the temperature 20min.With 15 DEG C/min's after heat preservation
Rate cooling, furnace cooling after being down to 400 DEG C.
4）Plating：By the aluminium alloy obtained after surface polishing carry out copper coating, coating with a thickness of 4 ~ 5 μm.
5）Welding：Plating albronze is embedded in the hole of graphene-based composite material using the technology of welding, use
Solder is Sn0.3Ag0.7Cu soldering paste, and welding equipment is vacuum brazing furnace.With the surface of acetone cleaning welding body, welding before welding
Technique be：When vacuum degree reaches 10-3After Pa, 150 DEG C are warming up to the heating rate of 20 DEG C/min, is continued with 10 DEG C/min
Rate be warming up to 350 DEG C, keep the temperature 5min, be cooled to room temperature with furnace after heat preservation to get to a kind of grapheme material substrate
Inside inlay the conductive structure of aluminium alloy.
With embodiment 1 using the verifying heat dissipation of identical experimental provision as a result, the power of two heat sources is all 250W.As a result table
Bright, the conductive structure that the present embodiment obtains can make the temperature of heat source be reduced to 77.1 DEG C.And same technique is used, with simple
Graphene board as temperature-uniforming plate, heat source temperature is 96.2 DEG C, compare for, temperature of the invention reduces 19.1 DEG C.With pure
Aluminium sheet, which is used as, replaces the present invention, and the temperature of heat source is 86.5 DEG C.As can be seen from the above results, heat dissipation effect of the invention is much
Better than pure grapheme material and fine aluminium, and the present invention also has light advantage.Therefore, the present invention has in aerospace field
Huge application prospect.
Embodiment 3：
Present embodiments provide the manufacturing method that aluminium alloy is inlayed in a kind of graphene-based composite substrate, specific implementation step
It is as follows：
1）To select one piece of area be 200 × 200mm, with a thickness of the graphene/carbon composite material substrate of 5mm, wherein graphene body
Fraction is 90%, and carbon nanotube by volume content is 10%, and graphene is along X/Y plane direction oriented alignment, and the plane thermal conductivity of substrate
Rate is ~ 1300W/（m.K）, vertical direction thermal conductivity is ~ 3 ~ 6W/（m.K）.Using numerically-controlled machine tool and milling cutter, graphene-based multiple
It is trapezoidal through-hole that lateral section is beaten on condensation material substrate, and the size of hole upper surface is 15 × 15mm, the size of lower surface is 20 ×
20mm。
2）Prepare aluminium alloy block：6061 aluminiums are selected, prepare aluminium alloy block using the technique of numerically-controlled machine tool wire cutting,
There are the surpluses of 0.1mm on aluminium alloy each surface, carry out surface polishing treatment.The size of aluminium alloy block is：Height is 5mm,
The side length of upper surface is 14.7 × 14.7mm, and the side length of lower surface is 19.7 × 19.7mm, lower surface and heat source contact.
3）Surface metalation：Suitable Cr powder and SnAgCu eutectic powder are weighed with electronic balance, is mixed into Cr mass
Metallization powder, is then put into ball mill, with 80r/min by the Sn0.3Ag0.7Cu-9%Cr metallization powder that score is 9%
Speed ball milling 10h, obtain mixed metal powder.By binder and Sn0.3Ag0.7Cu-9%Cr metal powder with volume ratio 1：2
Mixing, is then coated in the hole surface of graphene substrate, one layer 35 μm of copper foil is bonded in metal powder surface later, later in hole
Centre is put into graphite jig, gives mold certain pressure, generates the hole surface of copper foil and metallization powder and substrate close
Combination.It is put into vacuum brazing furnace later to metallize, when vacuum degree reaches 10-3After Pa, with the heating speed of 20 DEG C/min
Degree is raised to 500 DEG C, is raised to 950 DEG C later with 10 DEG C/min, keeps the temperature 25min.Cooled down after heat preservation with the rate of 10 DEG C/min,
Furnace cooling after being down to 500 DEG C.
4）Plating：The aluminium alloy obtained after surface polishing is subjected to copper coating, the thickness of coating is 4 ~ 5 μm.
5）Welding：Plating albronze is embedded in the hole of graphene-based composite material using the technology of welding, use
Solder is Sn0.3Ag0.7Cu soldering paste, and welding equipment is vacuum brazing furnace.With the surface of acetone cleaning welding body, welding before welding
Technique be：When vacuum degree reaches 10-3After Pa, 200 DEG C are warming up to the heating rate of 15 DEG C/min, is continued with 5 DEG C/min
Rate be warming up to 325 DEG C, keep the temperature 10min, be cooled to room temperature with furnace after heat preservation to get to a kind of grapheme material substrate
Inside inlay the conductive structure of aluminium alloy.
Conductive structure manufactured in the present embodiment carries out heat dissipation effect verifying.The result shows that the thermally conductive knot that the present embodiment obtains
Structure can make the temperature of heat source be reduced to 80.3 DEG C.And same technique is used, use simple graphene board as temperature-uniforming plate, heat
Source temperature is 98.9 DEG C, compare for, temperature of the invention reduces 18.6 DEG C.
Embodiment 4：
Present embodiments provide the manufacturing method that aluminium alloy is inlayed in a kind of graphene-based composite substrate, specific implementation step
It is as follows：
1）Selecting one piece of area is 200 × 150mm, with a thickness of the graphene-based composite substrate of 10mm, wherein adding 10% body
The copper of fraction, graphene is along X/Y plane direction oriented alignment, and the plane thermal conductivity of substrate is ~ 1200W/（m.K）, Vertical Square
It is ~ 5W/ to thermal conductivity（m.K）.Using numerically-controlled machine tool and milling cutter, a lateral section is made a call on graphene-based composite substrate is
Trapezoidal through-hole, the height in hole and the thickness of substrate are identical, and the size of hole upper surface is 15 × 15mm, and the size of lower surface is 20
× 20mm, the center position of the position in hole in graphene substrate.
2）Prepare aluminium alloy block：Pure aluminum material is selected, prepares aluminium alloy block using the technique of numerically-controlled machine tool wire cutting,
There are the surpluses of 0.1mm on aluminium alloy each surface, carry out surface polishing treatment.The size of aluminium alloy is：Height is 10mm, upper table
The side length in face is 14.7 × 14.7mm, and the side length of lower surface is 19.7 × 19.7mm, lower surface and heat source contact.
3）Surface metalation：Suitable Cr powder and SnAgCu eutectic powder are weighed with electronic balance, is mixed into Cr mass
Metallization powder, is then put into ball mill, with 100r/min by the Sn0.3Ag0.7Cu-7%Cr metallization powder that score is 7%
Speed ball milling 8h, obtain mixed metal powder.By binder and Sn0.3Ag0.7Cu-7%Cr metal powder with 1：1.5 volume
Than mixing, it is then coated in the hole surface of graphene substrate, is bonded one layer 20 μm of copper foil, Zhi Hou in metal powder surface later
It is put into graphite jig among hole, gives mold certain pressure, generates the hole surface of copper foil and metallization powder and substrate tight
Close combination.It is put into vacuum brazing furnace later to metallize, when vacuum degree reaches 10-3After Pa, with the heating of 10 DEG C/min
Speed is raised to 600 DEG C, is raised to 940 DEG C later with 10 DEG C/min, keeps the temperature 30min.It is dropped after heat preservation with the rate of 15 DEG C/min
Temperature, furnace cooling after being down to 600 DEG C.
4）Plating：By the aluminium alloy obtained after surface polishing carry out copper coating, coating with a thickness of 4 ~ 5 μm.
5）Welding：Plating albronze is embedded in the hole of graphene-based composite material using the technology of welding, use
Solder is Sn0.3Ag0.7Cu soldering paste, and welding equipment is vacuum brazing furnace.With the surface of acetone cleaning welding body, welding before welding
Technique be：When vacuum degree reaches 10-3After Pa, 150 DEG C are warming up to the heating rate of 20 DEG C/min, is continued with 10 DEG C/min
Rate be warming up to 300 DEG C, keep the temperature 15min, be cooled to room temperature with furnace after heat preservation to get to a kind of grapheme material substrate
Inside inlay the conductive structure of fine aluminium.
Carry out thermal conductivity test, the results showed that, the present invention can make the temperature of heat source be reduced to 72.0 DEG C, the temperature on sample
Difference is at 12.1 DEG C or so.Of the invention makes the temperature of heat source reduce 18.7 DEG C, and even temperature effect is more preferable.
Claims (10)
1. inlaying the conductive structure of aluminium alloy in a kind of graphene-based composite substrate, it is characterised in that the conductive structure packet
Graphene-based composite substrate and aluminium block body are included, wherein：
The graphene-based composite substrate longitudinally punches, and the position in the hole is in graphene-based composite substrate and heat source
Contact point on；
The aluminium block body is embedded in the hole of graphene-based composite substrate.
2. inlaying the conductive structure of aluminium alloy in graphene-based composite substrate according to claim 1, feature exists
It is identical in the height in the hole and the thickness of substrate；The lateral section in hole is trapezoidal；The size and number in hole are according to the size of heat source
It is determined with quantity；Hole knockout is CNC processing.
3. inlaying the conductive structure of aluminium alloy in graphene-based composite substrate according to claim 1, feature exists
In the graphene-based composite material be by matrix of graphene and graphene material internal along graphene sheet layer direction orient
The three-dimensional material of arrangement.
4. inlaying the conductive structure of aluminium alloy in graphene-based composite substrate according to claim 1, feature exists
In the aluminium block body be fine aluminium block or aluminium alloy block.
5. inlaying the conductive structure of aluminium alloy, feature in graphene-based composite substrate according to claim 1 or 4
Be the aluminium block body lateral section be it is trapezoidal, short transverse is identical with the thickness of graphene-based composite substrate, quantity with
The quantity in hole is consistent.
6. inlaying the thermally conductive of aluminium alloy in graphene-based composite substrate described in a kind of claim 1-5 any claim
The manufacturing method of structure, it is characterised in that steps are as follows for the method：
1）It is longitudinally punched on graphene-based composite material；
2）Prepare aluminium block body；
3）Surface metalation：By step 1）Obtained graphene-based composite material hole surface carries out surface metalation；
4）Plating：By step 2）Aluminium block body after obtained surface polishing carries out copper coating；
5）Welding：By step 4）Obtained copper facing aluminium block body is embedded in step 3）Obtained surface metalation it is graphene-based compound
In the hole of material substrate, the conductive structure that aluminium alloy is inlayed in grapheme material substrate is obtained.
7. inlaying the manufacturing method of aluminium alloy in graphene-based composite substrate according to claim 6, feature exists
The mode of first wire cutting re-polishing is taken in the processing method of the aluminium block body；There are 0.1 ~ 0.3mm on each surface of aluminium block body
Surplus, upper bottom surface side ratio step 1）Small 0.3 ~ the 0.5mm in the hole.
8. inlaying the manufacturing method of aluminium alloy in graphene-based composite substrate according to claim 6, feature exists
In the step 3）Specific step is as follows：
A, suitable Cr powder and SnAgCu eutectic powder are weighed with electronic balance, being mixed into Cr mass fraction is 7 ~ 11%
Then metallization powder is put into ball mill, with the speed of 80 ~ 100r/min by Sn0.3Ag0.7Cu-x%Cr metallization powder
8 ~ 12h of ball milling, obtains mixed metal powder；B, by binder and Sn0.3Ag0.7Cu-x%Cr metal powder with 1：1~1：2 body
Then product is coated in the hole surface of graphene-based composite substrate than mixing, be bonded one layer 20 ~ 50 in metal powder surface later
μm copper foil, graphite jig is put among hole later, gives mold pressure, makes the hole table of copper foil and metallize powder and substrate
Face, which generates, closely to be combined；C, it is put into vacuum brazing furnace later to metallize, the technique of metallization is：When vacuum degree reaches
10-3After Pa, 400 ~ 600 DEG C are raised to the heating rate of 10 ~ 30 DEG C/min, is raised to later with the rate of 5 ~ 15 DEG C/min specified
Metallizing temperature, in 940 ~ 960 DEG C of 20 ~ 30min of heat preservation；D, cooled down after heat preservation with the rate of 5 ~ 15 DEG C/min, be down to
Furnace cooling after 400 ~ 600 DEG C.
9. inlaying the manufacturing method of aluminium alloy in graphene-based composite substrate according to claim 6, feature exists
In the coating with a thickness of 4 ~ 5 μm.
10. inlaying the manufacturing method of aluminium alloy in graphene-based composite substrate according to claim 6, feature exists
In the step 5）Specific step is as follows：
By step 4）Obtained copper facing aluminium block body is embedded in step 3 using the technology of welding）The graphene-based composite material
In the hole of substrate, for the solder used for Sn0.3Ag0.7Cu soldering paste, welding equipment is vacuum brazing furnace；It is clear to weld preceding acetone
The technique on the surface of clean welding body, welding is：When vacuum degree reaches 10-3After Pa, heated up with the heating rate of 10 ~ 20 DEG C/min
To 150 ~ 250 DEG C, continues to be warming up to 300 ~ 350 DEG C with the rate of 5 ~ 10 DEG C/min, 5 ~ 15min is kept the temperature, with furnace after heat preservation
Room temperature is cooled to get to the conductive structure for inlaying aluminium alloy in grapheme material substrate.
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