CN109627034A - A kind of preparation of high thermal conductivity C/C composite material - Google Patents
A kind of preparation of high thermal conductivity C/C composite material Download PDFInfo
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- CN109627034A CN109627034A CN201710926532.1A CN201710926532A CN109627034A CN 109627034 A CN109627034 A CN 109627034A CN 201710926532 A CN201710926532 A CN 201710926532A CN 109627034 A CN109627034 A CN 109627034A
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- 239000002131 composite material Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 56
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000007598 dipping method Methods 0.000 claims abstract description 16
- 230000002708 enhancing effect Effects 0.000 claims abstract description 15
- 238000005087 graphitization Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 6
- 239000010426 asphalt Substances 0.000 claims abstract description 6
- 239000004917 carbon fiber Substances 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims abstract 2
- 238000003763 carbonization Methods 0.000 claims description 11
- 239000011261 inert gas Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims 3
- 230000001351 cycling effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 238000007654 immersion Methods 0.000 claims 1
- 230000003252 repetitive effect Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 8
- 239000011159 matrix material Substances 0.000 abstract description 8
- 239000011302 mesophase pitch Substances 0.000 abstract description 5
- 239000011295 pitch Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000011157 advanced composite material Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- -1 that is Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/83—Carbon fibres in a carbon matrix
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/522—Graphite
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- C04B35/806—
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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Abstract
The invention discloses a kind of band-like carbon filaments of high thermal conductivity to enhance asphaltic base C/C composite material and preparation method.Using band-like carbon filament as reinforcement, dipping agent bitumen is press-formed as carbon matrix through moulding press, is repeatedly impregnated/is carbonized, and the high thermal conductivity C/C composite material of band-like carbon filament enhancing is finally finally made by high temperature graphitization again.Compared with high thermal conductivity Mesophase Pitch-based Carbon Fibers, not only length direction thermal conductivity is high (up to 600-1800W/m.K) for the high thermal conductivity carbon filament that the present invention uses, but also cost is relatively low.Therefore the cost of high thermal conductivity C/C composite material can be effectively reduced, and improves its thermal conductivity.The C/C composite material made from high thermal conductivity carbon filament, according to the difference of volume fraction, thermal conductivity can adjust between 300-1000W/m.K, bending strength >=5MPa.Method provided by the invention is easy to operate, at low cost, and not only heating conduction is good for prepared high thermal conductivity C/C composite material, and has excellent electric conductivity.
Description
Technical field
The present invention relates to high thermal conductivity C/C technical field of composite materials, and in particular to a kind of band-like carbon filament enhancing of high thermal conductivity
The preparation method of asphaltic base C/C composite material.
Background technique
Advanced composite material is closed extensively due to having many advantages, such as specific strength, specific modulus height, endurance, anisotropy
Note and application.Wherein, C/C composite material, that is, carbon fiber reinforced carbon matrix composite, it is not only excellent with general composite material
It is anisotropic can, more have concurrently density is low, thermal shock resistance is high, Burning corrosion resistance can it is good, thermal expansion coefficient is small, highly conductive, high thermal conductivity etc. one
Serial excellent properties.Especially its intensity as the temperature rises, will not only reduce and be also possible to increase instead, be all known
The best material of heat-resisting quantity in material.Therefore C/C composite material since the advent of the world is rapidly developed and is widely applied,
It is widely used in the high-tech areas such as nuclear energy, aerospace, industrial manufacture, biomedicine.
In recent years, with the fast development of science and technology, heat dissipation becomes the key technology of many fields development.Such as with big
The continuous promotion and the raising of electronic component integration degree of the electrical installations performance such as type computer and laptop, unit
The calorific value of volume electronic device increases rapidly, and the heat that system generates increases severely.In order to guarantee the normal of equipment and stablize fortune
Row, needs to distribute the heat of generation in time.The continuous development of aeronautical and space technology simultaneously, various New Equipments such as satellite, airship
And the requirement to system thermal management and complement heat conduction such as near space vehicle is higher and higher, thermal control, thermal balance in system
Ability has decisive impact the performance of all kinds of aircraft.Therefore, has high thermal conductivity, low-density, more much lower than metal
Thermal expansion coefficient and good high-temperature mechanical property the advantages that C/C composite material become most with prospects in recent years one
Class Heat Conduction Material.But since the preparation process of C/C composite material is complicated, equipment operation is difficult, cause the production cycle it is long, at
This is higher, and especially high thermal conductivity Carbon fibe is all the time as the enhancing for improving the C/C composite material capacity of heat transmission and mechanical property
The problems such as body, there are at high cost, thermal conductivity is lower, and braiding is difficult, thus greatly limit high thermal conductivity C/C composite material into
The development of one step and application.
Therefore how to further increase the thermal conductivity of C/C composite material, reduce preparation cost, energy consumption and preparation process complexity
Degree, and expansion application field become current problem to be solved.
In order to prepare the more excellent high thermal conductivity C/C composite material of performance, for many years both at home and abroad outstanding scholar mainly from
The influence factors such as carbon matrix, Carbon fibe type and the structure of influence high thermal conductivity C/C composite material thermal conductivity, which are set out, to be studied, such as
Patent CN102690125A describes a kind of highly directional high thermal conductivity C/C composite material and preparation method, and technical solution is: adopting
It is raw material with the band-like Mesophase Pitch Fiberss in big section, carries out oxidation stability；Band-like interphase after oxidative stabilization again
The uniform coated with adhesive in the surface of pitch fibers, binder are 4~20wt% of raw material；It then will be band-like after coated with adhesive
Mesophase Pitch Fiberss are unidirectionally laid in hot-forming in mold；Finally carry out 1000~1600 DEG C of carbonizations and 2800~3100 DEG C
Highly directional high thermal conductivity C/C composite material is finally made in graphitization processing.Hot-forming temperature is 300~700 in this patent
DEG C, hot pressing pressure is 5~20Mpa, heat-insulation pressure keeping 1~for 24 hours.Although the invention preparation process is simple, cost is relatively low, repeatability
It is good, it is with short production cycle, but there are thermal conductivity is relatively low, the disadvantages of the high requirements on the equipment.
Patent CN103408315A describes a kind of high thermal conductivity C/C composite material and its preparation process, it is with high thermal conductivity
Mesophase Pitch-based Carbon Fibers cloth is XY to reinforcement, and high mould Carbon fibe is Z-direction reinforcing fiber, is prepared by carbon cloth puncture technique
Three-dimensional high thermal conductivity carbon fabric；Then using mesophase pitch as matrix precursor, three-dimensional height is led by dipping/carbonization technology
Hot carbon fabric carries out densification；It finally carries out 2800 DEG C or more high temperature graphitizations to the material of acquisition to handle, finally
Three-dimensional intermediate phase pitch-based high thermal conductivity C/C composite material is obtained, which substantially increases the thermal conductivity of C/C composite material
Rate, modulus and dimensional stability, material XY can achieve 360W//m.K to thermal conductivity highest, but there are Carbon fibes for the invention
The disadvantages of establishment is difficult, preparation process is complicated.
The shortcomings that in view of the factor and high thermal conductivity Carbon fibe for influencing high thermal conductivity C/C composite material thermal conductivity as reinforcement,
The present invention will introduce a kind of high thermal conductivity C/C composite material prepared using high thermal conductivity carbon filament as reinforcement.
The band-like carbon filament of high thermal conductivity is that a kind of new material for having very much development and application prospect, especially its thermal conductivity are high (long
The thermal conductivity in direction is spent up to 600-1800W/m.K), Du≤4 μm Hou, tensile strength > 5Mpa, and cost is relatively low, this undoubtedly exists
Raising C/C composite material thermal conductivity, reduction energy consumption and save the cost etc. play the role of very big.But band-like carbon filament exists by force
Lower disadvantage is spent, and the carbon matrix that pitch is converted to can just make up this disadvantage.
Compared with other matrix precursors, pitch is with resourceful, cheap, phosphorus content is high, good fluidity, Yi Shi
The advantages that inkization, is often used as the matrix precursor of C/C composite material.The present invention will be band-like with above-mentioned novel high thermal conductivity
Carbon filament is reinforcement, and pitch is carbon matrix, prepares the C/C composite material with higher heat-conductivity.
Summary of the invention
In order to solve present in high thermal conductivity C/C composite material at this stage it is at high cost, the period is long, thermal conductivity is relatively low
Problem leads high thermal conductivity carbon filament instead of Carbon fibe the present invention provides a kind of as the reinforcement of C/C composite material to prepare height
The preparation process of hot C/C composite material, with this technique be made thermal conductivity is higher, preparation process is simple, low-cost C/C is compound
Material.
The technical solution for realizing the object of the invention is a kind of system of band-like high thermal conductivity carbon filament enhancing asphaltic base C/C composite material
Preparation Method, preparation process flow as shown in Figure 1, specific steps are as follows:
(1) it takes a certain amount of band-like carbon filament of pretreatment to be added in asphalt impregnant to impregnate, the carbon filament for impregnating pitch is placed in
Unidirectional laying is carried out in mold, and then the mold for completing band-like carbon filament is placed in moulding press and is pressed and molded；
(2) sample after molding is placed in carbide furnace and carries out high temperature cabonization, obtain C/C composite material；
(3) dipping of C/C composite material, the C/C composite material after carbonization will carry out vacuumizing dipping；
(4) (2), (3) step 4~10 time are repeated；
(5) dipping/carbonization 4~10 times C/C composite materials are subjected to high temperature graphitization processing.
The molding of sample is carried out in moulding press in above-mentioned steps (1), and molding temperature is 90~150 DEG C, and pressure is
0.3~1.5Mpa, pressure maintaining certain time wait for sample formation.
The high thermal conductivity C/C composite material, the Carbonization Conditions of sample in above-mentioned steps (2) are as follows: with certain heating rate
Be warming up to 800 ~ 1800 DEG C, then keep the temperature 1~3h or so at this temperature, finally naturally cool to room temperature, from heating, keep the temperature to
Cooling is all to carry out under inert gas protection.
Vacuumizing dipping involved in above-mentioned steps (3) is carried out in vacuum drying oven, concrete operation step are as follows: will be carbonized
Sample afterwards is put in asphalt powder, is subsequently placed in vacuum drying oven and is preheated, and when pitch softening, starts to vacuumize, 90 ~
Vacuum impregnation for a period of time, finally naturally cools to room temperature under vacuum conditions at 180 DEG C.
The graphitization of sample carries out under inert gas protection in above-mentioned steps (5), with the heating of certain heating rate
Heat preservation a period of time when to 2300~3000 DEG C, then cooled to room temperature.
Detailed description of the invention
Fig. 1: the preparation technology flow chart of the band-like carbon filament enhancing asphaltic base C/C composite material of high thermal conductivity.
Specific embodiment
In order to better understand the present invention, it further illustrates combined with specific embodiments below, but the present invention is not limited to
Following embodiment.
Embodiment 1:
(1) a certain amount of band-like carbon filament of pretreated high thermal conductivity is placed in pitch and is impregnated, the band-like carbon filament of pitch will be impregnated
It is placed in mold and carries out unidirectional laying, the sample completed is placed in moulding press, temperature is first risen to 120 DEG C, then carry out again
Pressurization, when pressure rises to 0.5Mpa pressure maintaining certain time, to sample formation；
(2) sample molding in step (1) is taken out, is placed in carbide furnace and is carbonized, first vacuumized before carbonization, then Xu
Xu is passed through inert gas, concurrently sets heating rate to 1000 DEG C, then keeps the temperature 1.5h at this temperature, finally naturally cool to
Room temperature is all to carry out under inert gas protection from heating, heat preservation to cooling；
(3) sample being carbonized in step (2) taking-up is put in vacuum drying oven and vacuumizes dipping, specific steps are as follows: will be carbonized
The sample crossed is put in asphalt powder, is subsequently placed in vacuum drying oven and is preheated, and when pitch softening, starts to vacuumize, at 120 DEG C
When vacuum impregnation for a period of time, finally naturally cool to room temperature under vacuum conditions；
(4) step (2), (3) are repeated 10 times again.Enhance asphaltic base C/C composite material up to band-like carbon filament；
(5) dipping in step (4)/be carbonized 10 times samples are subjected to high temperature graphitization processing, specific steps are as follows: put sample
Enter in graphitizing furnace, first vacuumize, then pass to inert gas, set heating rate and be warming up to 2300 DEG C, at this temperature
Heat preservation a period of time, then cooled to room temperature, all carries out under inert gas protection from heating, heat preservation to cooling.
The density of the high thermal conductivity C/C composite material prepared by the above process is 1.46g/cm3, high thermal conductivity carbon filament volume point
Number is 30%, and resistivity is 17.7m cm, and thermal conductivity is up to 432.05W/m.K, and bending strength is lower, is 54.42Mpa.
Embodiment 2:
Process is with embodiment 1, the difference is that pressure is 1Mpa in 1 step of embodiment (1).Thus the high thermal conductivity C/C prepared is multiple
The density of condensation material is 1.51g/cm3, high thermal conductivity carbon filament volume fraction is 42%, and resistivity is 15.2m cm, and thermal conductivity is up to
553.05W/m.K, bending strength is relatively low, is 42.65Mpa.
Embodiment 3:
Process is with embodiment 1, the difference is that pressure is 1.5Mpa in 1 step of embodiment (1).Thus the high thermal conductivity C/C prepared
The density of composite material is 1.50g/cm3, high thermal conductivity carbon filament volume fraction is 65%, and resistivity is 3.3m cm, and thermal conductivity is high
Up to 667.13W/m.K, bending strength is lower, is 28.17Mpa.
Embodiment 4
Process is with embodiment 1, the difference is that carburizing temperature is 1500 DEG C in 1 step of embodiment (2), and without step
(5) graphitization processing.Thus the density of the high thermal conductivity C/C composite material prepared is 1.50g/cm3, the volume of high thermal conductivity carbon filament
Score is 65%, and resistivity is 7.2m cm, thermal conductivity 617.53W/m.K, bending strength 26.25Mpa.
Embodiment 5
Process is with embodiment 1, the difference is that the graphitization processing without 1 step of embodiment (5).Thus the high thermal conductivity C/ prepared
The density of C composite is 1.50g/cm3, the volume fraction of high thermal conductivity carbon filament is 65%, and resistivity is 14.4m cm, thermal conductivity
Rate is 579.16W/m.K, bending strength 23.39Mpa.
Embodiment 6
Process is with embodiment 1, the difference is that carbonization/dipping time is 7 times in 1 step of embodiment (4).Thus the height prepared
The density of thermally conductive C/C composite material is 1.47g/cm3, the volume fraction of high thermal conductivity carbon filament is 39.5%, resistivity 16.3m
Cm, thermal conductivity 520.65W/m.K, bending strength is relatively low, is 29.67Mpa.
Embodiment 7
Process is with embodiment 1, the difference is that carbonization/dipping time is 4 times in 1 step of embodiment (4).Thus the height prepared is led
The density of hot C/C composite material is 1.45g/cm3, the volume fraction of high thermal conductivity carbon filament is 49%, and resistivity is 14.9m cm,
Thermal conductivity is 573.34W/m.K, bending strength 19.39Mpa.
Claims (7)
1. a kind of preparation method of the band-like carbon filament enhancing asphaltic base C/C composite material of high thermal conductivity, it is characterised in that be by following
What step obtained:
(1) selection of pitch, by consulting literatures, we have selected, and charring rate is high, viscosity is low and band-like carbon filament contact angle is small,
The good dipping agent bitumen of dipping effect is used to prepare such C/C composite material；
(2) compression molding of composite material takes a certain amount of band-like carbon filament of pretreatment to be added in asphalt impregnant and impregnates, then
The band-like carbon filament for impregnating pitch is unidirectionally laid in mold, then mold is placed in moulding press and is pressed and molded, has been molded
By article removal after；
(3) the high thermal conductivity carbon filament enhancing asphalt-base composite materials after compression molding are put into carbide furnace by the carbonization of composite material
It is passed through inert gas and carries out high temperature cabonization, obtain high thermal conductivity carbon filament enhancing asphaltic base C/C composite material；
(4) the C/C composite material after carbonization is put in the mold full of pitch and is placed in vacuum baking by the dipping of C/C composite material
It carries out vacuumizing dipping in case；
(5) dipping/be carbonized 4~10 times samples are put into graphitizing furnace and in indifferent gas by the graphitization of C/C composite material
Body protection is lower to carry out high temperature graphitization, obtains the high thermal conductivity C/C composite material of band-like carbon filament enhancing.
2. a kind of method for preparing the band-like carbon filament enhancing asphaltic base C/C composite material of high thermal conductivity according to claim 1,
It is characterized in that replacing the band-like carbon filament of reinforcement high thermal conductivity Carbon fiber Wesy high thermal conductivity in traditional high thermal conductivity C/C composite material, band
Shape carbon filament is many higher compared with the thermal conductivity of Carbon fibe, and cost is relatively low, Dao Re Shuai≤600W/ of the high thermal conductivity carbon filament in length direction
Du≤4 μm m.K, Hou, tensile strength > 5Mpa.
3. a kind of method for preparing the band-like carbon filament enhancing asphaltic base C/C composite material of high thermal conductivity according to claim 1,
The compression molding condition for being characterized in that composite material in step (2) is to be pressurized to 0.3~1.5Mpa in moulding press, be warming up to 90
Pressure maintaining certain time, makes sample formation at~150 DEG C.
4. a kind of method for preparing the band-like carbon filament enhancing asphaltic base C/C composite material of high thermal conductivity according to claim 1,
It is characterized in that the high temperature cabonization condition of composite material in step (3) are as follows: rise to 800 ~ 1800 DEG C with certain heating rate, and herein
At a temperature of keep the temperature 1~3h after, cooled to room temperature, entire carbonisation all carries out under inert gas protection.
5. a kind of method for preparing the band-like carbon filament enhancing asphaltic base C/C composite material of high thermal conductivity according to claim 1,
The immersion condition for being characterized in that C/C composite material in step (4) is that dipping certain time is vacuumized at 90 ~ 180 DEG C.
6. a kind of method for preparing the band-like carbon filament enhancing asphaltic base C/C composite material of high thermal conductivity according to claim 1,
It is characterized in that step (3), (4) are wanted repetitive cycling 4~10 times, to increase the density and consistency of composite material, to increase multiple
The thermally conductive and mechanical property of condensation material.
7. a kind of method for preparing the band-like carbon filament enhancing asphaltic base C/C composite material of high thermal conductivity according to claim 1,
The high temperature graphitization condition for being characterized in that composite material in step (5) is that 2300~3000 DEG C are risen to certain heating rate, is protected
After warm a period of time, cooled to room temperature, entire graphitizing process all carries out under inert gas protection.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064340A (en) * | 2020-09-14 | 2020-12-11 | 湖南东映碳材料科技有限公司 | Quasi-isotropic high-thermal-conductivity composite material and preparation method thereof |
| CN113277866A (en) * | 2021-04-30 | 2021-08-20 | 北京化工大学 | Preparation method of bidirectional high-thermal-conductivity carbon/carbon composite material |
| CN114436669A (en) * | 2022-02-21 | 2022-05-06 | 武汉科技大学 | Preparation method of one-dimensional high-thermal-conductivity C/C composite material |
| CN114524681A (en) * | 2020-11-23 | 2022-05-24 | 航天特种材料及工艺技术研究所 | High-strength high-thermal-conductivity ceramic matrix composite material, and preparation method and application thereof |
| CN115572174A (en) * | 2022-11-03 | 2023-01-06 | 北京天仁道和新材料有限公司 | Preparation method of carbon-carbon composite material, carbon-carbon composite material and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102690125A (en) * | 2012-06-26 | 2012-09-26 | 武汉科技大学 | Highly-oriented highly-heat-conducting carbon/carbon composite material and preparation method thereof |
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| CN112064340A (en) * | 2020-09-14 | 2020-12-11 | 湖南东映碳材料科技有限公司 | Quasi-isotropic high-thermal-conductivity composite material and preparation method thereof |
| CN112064340B (en) * | 2020-09-14 | 2022-12-13 | 湖南东映碳材料科技有限公司 | Quasi-isotropic high-thermal-conductivity composite material and preparation method thereof |
| CN114524681A (en) * | 2020-11-23 | 2022-05-24 | 航天特种材料及工艺技术研究所 | High-strength high-thermal-conductivity ceramic matrix composite material, and preparation method and application thereof |
| CN113277866A (en) * | 2021-04-30 | 2021-08-20 | 北京化工大学 | Preparation method of bidirectional high-thermal-conductivity carbon/carbon composite material |
| CN113277866B (en) * | 2021-04-30 | 2022-09-23 | 北京化工大学 | Preparation method of bidirectional high-thermal-conductivity carbon/carbon composite material |
| CN114436669A (en) * | 2022-02-21 | 2022-05-06 | 武汉科技大学 | Preparation method of one-dimensional high-thermal-conductivity C/C composite material |
| CN115572174A (en) * | 2022-11-03 | 2023-01-06 | 北京天仁道和新材料有限公司 | Preparation method of carbon-carbon composite material, carbon-carbon composite material and application thereof |
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Application publication date: 20190416 |