CN109722883A - The preparation method of double base matrix carbon fiber Tooth preparation - Google Patents
The preparation method of double base matrix carbon fiber Tooth preparation Download PDFInfo
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- CN109722883A CN109722883A CN201811600376.0A CN201811600376A CN109722883A CN 109722883 A CN109722883 A CN 109722883A CN 201811600376 A CN201811600376 A CN 201811600376A CN 109722883 A CN109722883 A CN 109722883A
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Abstract
A kind of preparation method of QTCC double base matrix carbon fiber precast body, the invention belongs to carbon fiber precast body production technical field, the present invention holds the characteristics such as difference with the thermally conductive of fiber axial direction in diametrical direction according to the thermal conductivity of carbon fiber and the relevance of density and carbon fiber.Double base matrix, carbon fiber precast body are used with QTCC principle, preparation method works out low-density, high temperature resistant, the precast body of good in insulation effect.
Description
Technical field
The invention belongs to carbon fiber precast body production technical fields, and in particular to a kind of quantum critical state QTCC double base matrix
The preparation method of carbon fiber precast body.
Background technique
C/C-Sic composite material is as high-quality friction material of new generation, in bullet train, aircraft, automobile, engineering machinery
The fields such as braking system have good application market.The C/C-SiC composite temperature of traditional (LSI) method preparation is higher,
Easily and fiber-reactive, larger to Carbon Fiber Damage, material internal residual Si content is higher, the use of temperature is more than Si fusing point for liquid Si
When can make material loss mechanical strength, friction temperature performance is poor, is restricted in high-temperature applications.Existing market high temperature is set
Standby heat-barrier material is used to be entwined containing miscellaneous soft felt, and service life is short, of poor benefits.Felt is net tire list made of being tiled as multilayer
Member, the structure made of plane vertical mode needle system.The product structure shape that it is prepared is single, there are pin hole producing
Product using when easily infiltrate into other corrosive substances, damage product quality.And the existing carbon fiber that can be applied to hot environment
Precast body, the pyrolytic carbon face preparation time such as prepared using chemical vapor deposition method is long, preparation temperature height and polymeric matrix
The disadvantages of conjugation is weaker, declines so as to cause the strength of materials.
QTCC(quantum critical state): know that the intensity of material is improved with the reduction of crystallite dimension.It is advanced using the world
In the magnetic " quantum critical state " without nematic of solid state NMR technique (75As) control C/C carbon group compound, no nematic
Magnon critical state speciality in, the spin fluctuation of no nematic is the main driving key factor feature of high-temperature superconductivity, lead to
Crossing two data adjusting high temperature and pressure of three-dimensional CAD modeling and Magics software makes the hydrothermal solution activity and minor fluctuations width of material core
Novel magnetic order is presented in degree, and reaches " quantum critical state " best peak and refer to, " causing precise and tiny, vast to the greatest extent " optimization design a new generation high-quality
Functional material.
Summary of the invention
The present invention is axial with fiber in diametrical direction according to the thermal conductivity of carbon fiber and the relevance of density and carbon fiber
Thermally conductive hold the characteristics such as difference.Double base matrix, carbon fiber precast body are used with QTCC principle, preparation method prepares low-density, resistance to
High temperature, the precast body of good in insulation effect.
The preparation method of the QTCC double base matrix carbon fiber precast body, specifically comprises the following steps: carbon fiber precast body
Braiding and high-temperature process:
A kind of preparation method of QTCC double base matrix carbon fiber precast body, the preparation method include the following steps:
(1), using the carbon fiber of carbon content >=90% as raw material, fiber is chopped into 56-60mm, is combed into lousiness simultaneously with carding machine
Net tire elementary layer is made, carbon fiber arragement direction and all planes of net tire elementary layer are almost the same；
(2), it uses interval to hand over laminated cloth/net tire of body for the continuous auxiliary layer of structural unit, 20-40 layers of net tire elementary layer is passed through
Needle thorn is connected to one, and net tire is made；
(3), laminated cloth and net tire ratio are (70-90): (30-15), and interlayer density is 12 ~ 20 layers/cm, and needling density is 30 ~ 50
Carbon fiber entirety felt is made by continuous needle mode in needle/cm2；
(4), whole felt is pierced as carbon fiber precast body, in argon inert protective condition using the needle that density is 0.40 ~ 0.55g/cm3
Under 1800 ~ 2000 DEG C of high-temperature heat treatments are carried out to it；
(5), pyrolysis carbon protective layer preparation: using natural gas as carbon source, using chemical vapour deposition technique in above-mentioned carbon fiber precast body
Carbon fiber surface preparation, be pyrolyzed carbon protective layer, obtain bulk density be 0.55 ~ 0.70g/cm3 porous carbon/carbon green body, obtain
To finished product；The condition of chemical vapor deposition are as follows: depositing temperature is 1000 ~ 1100 DEG C, and deposition pressure is 1.2 ~ 1.8kpa, when deposition
Between be 30 ~ 50 hours.
Preferably, the net tire elementary layer grammes per square metre in step 1 is 20-400g/m2, and with a thickness of 0.2-200mm, density is
0.08-0.2g/cm³。
Preferably, the auxiliary layer mode of laminated cloth is (0 °/45 °/90 °/- 45 °) in step 3.
The invention has the benefit that
According to thermally conductive the holding of the relevance and carbon fiber of the thermal conductivity of carbon fiber and density in diametrical direction with fiber axial direction
Difference characteristic, the carbon fiber entirety Nomex of use；The auxiliary layer mode of laminated cloth is (0 °/45 °/90 °/- 45 °), is improved pre-
Body opening gap structure distribution processed is more uniform.Prefabricated volume density improves material friction stability in 0.1g/cm3 to 0.18g/cm3,
The Interlaminar shear strengths of material are enhanced simultaneously.
It is pierced using arc stripping net needle device needle, forms the green body of an entirety using tire unit, while in acupuncture course
It is mobile according to crawl synchronous with axial direction clockwise, guarantee needling fiber not Repeated Acupuncture, big pin hole is avoided to influence life of product.
Market is widely used, and using a variety of vacuum high-temperature sintering equipment, heat insulating effect is excellent, and preparation method is simple,
It is at low cost, profitable.
Specific embodiment
Embodiment 1
QTCC double base matrix, the preparation method of carbon fiber precast body specifically comprise the following steps:
(1), using the carbon fiber of carbon content >=90% as raw material, carbon fiber is chopped into 60mm, lousiness is combed into carding machine and makes
Networking tire elementary layer, net tire elementary layer grammes per square metre 80g/m2 are flat where carbon fiber arragement direction and net tire elementary layer with a thickness of 1mm
Face is almost the same.
(2), use laminated cloth/net tire for alternating for the continuous auxiliary layer of structural unit, the auxiliary layer mode of laminated cloth be (0 °/
45 °/90 °/- 45 °), it is connected to one using 10 layers of net tire elementary layer and by needle thorn, is combined into a net tire.
(3), laminated cloth and net tire ratio are 7:3, and interlayer density is 10 layers/cm, and carbon fiber is made by continuous needle mode
Whole felt, needling density are 30 needles/cm2, and bulk density is made for 0.42g/cm3 carbon fiber precast body, under argon gas protective condition
Whole felt is pierced to carbon fiber needle and carries out 1800 DEG C of heat treatments 2 hours.
(4), pyrocarbon coating is prepared in carbon fiber surface using chemical vapour deposition technique, depositing temperature is 1010 DEG C, is sunk
Overstocking power is 1.2kpa, and sedimentation time is 30 hours, and porous carbon/carbon green body that bulk density is 0.55g/cm3 is made.
Embodiment 2
QTCC double base matrix, the preparation method of carbon fiber precast body specifically comprise the following steps:
(1), using the carbon fiber of carbon content >=87% as raw material, carbon fiber is chopped into 58mm, lousiness is combed into carding machine and makes
Networking tire elementary layer, net tire elementary layer grammes per square metre 78g/m2 are flat where carbon fiber arragement direction and net tire elementary layer with a thickness of 1mm
Face is almost the same.
(2), use laminated cloth/net tire for alternating for the continuous auxiliary layer of structural unit, the auxiliary layer mode of laminated cloth be (0 °/
45 °/90 °/- 45 °), it is connected to one using 10 layers of net tire elementary layer and by needle thorn, is combined into a net tire.
(3), laminated cloth and net tire ratio are 7:3, and interlayer density is 10 layers/cm, and carbon fiber is made by continuous needle mode
Whole felt, needling density are 30 needles/cm2, and bulk density is made for 0.42g/cm3 carbon fiber precast body, under argon gas protective condition
Whole felt is pierced to carbon fiber needle and carries out 1750 DEG C of heat treatments 2.5 hours.
(4), pyrocarbon coating is prepared in carbon fiber surface using chemical vapour deposition technique, depositing temperature is 1000 DEG C, is sunk
Overstocking power is 1.4kpa, and sedimentation time is 28 hours, and porous carbon/carbon green body that bulk density is 0.55g/cm3 is made.
Embodiment 3
QTCC double base matrix, the preparation method of carbon fiber precast body specifically comprise the following steps:
(1), using the carbon fiber of carbon content >=90% as raw material, carbon fiber is chopped into 56mm, lousiness is combed into carding machine and makes
Networking tire elementary layer, net tire elementary layer grammes per square metre 72g/m2 are flat where carbon fiber arragement direction and net tire elementary layer with a thickness of 1mm
Face is almost the same.
(2), use laminated cloth/net tire for alternating for the continuous auxiliary layer of structural unit, the auxiliary layer mode of laminated cloth be (0 °/
45 °/90 °/- 45 °), it is connected to one using 10 layers of net tire elementary layer and by needle thorn, is combined into a net tire.
(3), laminated cloth and net tire ratio are 7:3, and interlayer density is 10 layers/cm, and carbon fiber is made by continuous needle mode
Whole felt, needling density are 30 needles/cm2, and bulk density is made for 0.42g/cm3 carbon fiber precast body, under argon gas protective condition
Whole felt is pierced to carbon fiber needle and carries out 1700 DEG C of heat treatments 3 hours.
(4), pyrocarbon coating is prepared in carbon fiber surface using chemical vapour deposition technique, depositing temperature is 1050 DEG C, is sunk
Overstocking power is 1.5kpa, and sedimentation time is 32 hours, and porous carbon/carbon green body that bulk density is 0.55g/cm3 is made.
Comparative example: existing felt is the knot made of plane vertical mode needle thorn of net tire unit made of multilayer tiling
Structure.The product structure shape that it is prepared is single, with when hour hands thorn there are big pin hole, pin hole product using when easily infiltrate into
Other corrosive substances, corrosion and damage product, if being easy to produce density using the product of aforesaid way preparation surface radian
The uniformity is poor, and the technical problem of the pressure control capability difference of each angle eventually leads to product poor thermal insulation property.
Carbon fiber precast body product in 1-embodiment of the embodiment of the present application 3 is passed through using arc stripping net needling device
The structure that the needle thorn mode of multi-angle is prepared.
Above embodiments be only limitted to be further elaborated the attainable technical effect of technical solution of the present invention institute and
Illustrate, be not the further restriction to technical solution of the present invention, those skilled in the art make non-on this basis
Essential characteristics outstanding and non-significant progress, belong to protection category of the invention.
Claims (3)
1. a kind of preparation method of QTCC double base matrix carbon fiber precast body, which is characterized in that the preparation method includes such as
Lower step:
(1), using the carbon fiber of carbon content >=90% as raw material, fiber is chopped into 56-60mm, is combed into lousiness simultaneously with carding machine
Net tire elementary layer is made, carbon fiber arragement direction and all planes of net tire elementary layer are almost the same；
(2), it uses interval to hand over laminated cloth/net tire of body for the continuous auxiliary layer of structural unit, 20-40 layers of net tire elementary layer is passed through
Needle thorn is connected to one, and net tire is made；
(3), laminated cloth and net tire ratio are (70-90): (30-15), and interlayer density is 12 ~ 20 layers/cm, and needling density is 30 ~ 50
Carbon fiber entirety felt is made by continuous needle mode in needle/cm2；
(4), whole felt is pierced as carbon fiber precast body, in argon inert protective condition using the needle that density is 0.40 ~ 0.55g/cm3
Under 1800 ~ 2000 DEG C of high-temperature heat treatments are carried out to it；
(5), pyrolysis carbon protective layer preparation: using natural gas as carbon source, using chemical vapour deposition technique in above-mentioned carbon fiber precast body
Carbon fiber surface preparation, be pyrolyzed carbon protective layer, obtain bulk density be 0.55 ~ 0.70g/cm3 porous carbon/carbon green body, obtain
To finished product；The condition of chemical vapor deposition are as follows: depositing temperature is 1000 ~ 1100 DEG C, and deposition pressure is 1.2 ~ 1.8kpa, when deposition
Between be 30 ~ 50 hours.
2. the preparation method of QTCC double base matrix carbon fiber precast body as described in claim 1, which is characterized in that in step 1
Net tire elementary layer grammes per square metre be 20-400g/m2, with a thickness of 0.2-200mm, density 0.08-0.2g/cm3.
3. the preparation method of QTCC double base matrix carbon fiber precast body as described in claim 1, which is characterized in that in step 3
The auxiliary layer mode of laminated cloth is (0 °/45 °/90 °/- 45 °).
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| CN201811600376.0A CN109722883A (en) | 2018-12-26 | 2018-12-26 | The preparation method of double base matrix carbon fiber Tooth preparation |
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| CN201811600376.0A CN109722883A (en) | 2018-12-26 | 2018-12-26 | The preparation method of double base matrix carbon fiber Tooth preparation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276157A (en) * | 2021-12-09 | 2022-04-05 | 安徽绿能技术研究院有限公司 | High-purity carbon-based composite material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2587992A1 (en) * | 1985-10-02 | 1987-04-03 | Europ Propulsion | CARBON-CARBON COMPOSITE MATERIAL FOR FRICTION COMPONENTS, AND ITS APPLICATION TO BRAKING DEVICES |
| CN102002819A (en) * | 2010-11-17 | 2011-04-06 | 大连创达技术交易市场有限公司 | Carbon fiber composite needling preform and preparation method thereof |
| CN105479829A (en) * | 2016-01-13 | 2016-04-13 | 青岛高泰新材料有限公司 | Low-density carbon fiber hard insulation quilt and preparation method thereof |
| CN108516852A (en) * | 2018-04-08 | 2018-09-11 | 中南大学 | A kind of carbon-silicon carbide double base matrix carbon fibre composite, preparation method and application |
-
2018
- 2018-12-26 CN CN201811600376.0A patent/CN109722883A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2587992A1 (en) * | 1985-10-02 | 1987-04-03 | Europ Propulsion | CARBON-CARBON COMPOSITE MATERIAL FOR FRICTION COMPONENTS, AND ITS APPLICATION TO BRAKING DEVICES |
| CN102002819A (en) * | 2010-11-17 | 2011-04-06 | 大连创达技术交易市场有限公司 | Carbon fiber composite needling preform and preparation method thereof |
| CN105479829A (en) * | 2016-01-13 | 2016-04-13 | 青岛高泰新材料有限公司 | Low-density carbon fiber hard insulation quilt and preparation method thereof |
| CN108516852A (en) * | 2018-04-08 | 2018-09-11 | 中南大学 | A kind of carbon-silicon carbide double base matrix carbon fibre composite, preparation method and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276157A (en) * | 2021-12-09 | 2022-04-05 | 安徽绿能技术研究院有限公司 | High-purity carbon-based composite material |
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