CN215628291U - Device for preparing carbon-carbon composite material - Google Patents
Device for preparing carbon-carbon composite material Download PDFInfo
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- CN215628291U CN215628291U CN202120725779.9U CN202120725779U CN215628291U CN 215628291 U CN215628291 U CN 215628291U CN 202120725779 U CN202120725779 U CN 202120725779U CN 215628291 U CN215628291 U CN 215628291U
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Abstract
A device for preparing carbon-carbon composite material relates to the technical field of new material preparation, wherein a prefabricated body is arranged in a tool, a heater is arranged outside the tool, an air inlet pipe (1) is arranged inside the prefabricated body, an air exhaust port (15) is arranged at the bottom of the tool, air is conveyed from inside to outside, deposition of pyrolytic carbon is propelled from high temperature to low temperature to complete densification, so that the deposition rate is improved, the uniformity of density is ensured, the surface of the prefabricated body is effectively prevented from crusting, one-step forming of the prefabricated body can be realized, and the device has the characteristics of high deposition efficiency, good product performance, large development potential and the like, and is suitable for large-scale popularization and application.
Description
Technical Field
The utility model relates to the technical field of new material preparation, in particular to a device for preparing a carbon-carbon composite material.
Background
Carbon/carbon composites (c-c composite or carbon-carbon composite materials) are known as carbon matrix composites reinforced with carbon fibers and their fabrics. Has a low density of<2.0g/cm3) The material has the advantages of high strength, high specific modulus, high thermal conductivity, low expansion coefficient, good friction performance, good thermal shock resistance, high dimensional stability and the like, is a few of alternative materials applied at the temperature of more than 1650 ℃, and has the highest theoretical temperature of 2600 ℃ higher.
Due to its unique properties, carbon/carbon composites have been widely used in the fields of intraocular lens preparation, aerospace, automotive industry, medicine, etc., such as rocket engine nozzles and throat liners thereof, thermal protection systems for end caps and wing leading edges of space shuttles, aircraft brake discs, etc.
The existing carbon/carbon composite material is usually prepared by a chemical vapor deposition method (CVD) and a traditional chemical liquid deposition method (CLD), wherein the traditional chemical liquid deposition method (CLD) is specifically realized by a chemical liquid deposition furnace, the heating time of a preform in the production of the equipment is 1/50-1/100 hours of the chemical vapor deposition method (CVD), and the skeleton density of the preform can be controlled from 0.3-0.8 g/cm3Is increased to 1.3 g/cm3However, the condensing device of the equipment adopts a blade type condenser, the recovery rate of the precursor is low, the environmental pollution is large, the method is not easy to control the product density, the production cost is greatly increased, the size of the prefabricated part is strictly limited, if the prefabricated part is large, the equipment power is extremely high, and the traditional Chemical Liquid Deposition (CLD) can not be popularized and applied in a large range by combining the factors. Wherein the specific device for realizing the Chemical Vapor Deposition (CVD) method is a chemical vapor deposition furnace, the device heats the whole preform in the production process, the process time lasts about 500-2000 hours, and the skeleton density of the preform is from 0.3-0.8 g/cm3Is increased to 1.3 g/cm3The above. In the existing chemical vapor deposition device, the surface of the prefabricated part is easy to crust in the deposition processThe gas circuit is closed, continuous deposition cannot be carried out, when continuous deposition cannot be carried out, the prefabricated body needs to be taken out for graphitization treatment, the crusting part on the surface of the prefabricated body is mechanically machined and removed after graphitization treatment, a gas circuit channel is opened, then the prefabricated body is placed into the deposition device again for deposition, if the crusting phenomenon occurs again, graphitization and machining are repeated, subsequent deposition can be carried out, the design requirement is met until the deposition of the prefabricated body is completed, the process is complicated, the production period is long, and the cost is high finally. It is important how to provide an apparatus for preparing a carbon-carbon composite material.
Disclosure of Invention
In order to overcome the defects in the background art, the utility model provides a device for preparing a carbon-carbon composite material, which can force gas to be conveyed from inside to outside, and the deposition of pyrolytic carbon is advanced from high temperature to low temperature to finish densification, thereby improving the deposition rate, ensuring the uniformity of density, effectively avoiding the surface incrustation of a preform, realizing the one-step molding of the preform and the like.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a device for preparing carbon-carbon composite, includes heater, preform apron, frock, intake pipe and furnace body be equipped with at least one inclosed frock in the furnace body be equipped with at least one preform in the frock, be equipped with the preform apron at the open end of preform, be equipped with the intake pipe on the frock apron in the frock, the lower extreme of intake pipe passes the inside that the preform apron extends to the preform downwards, and the upper end of intake pipe passes the outside gas mixer of furnace body coupling, is equipped with at least one extraction opening on the frock bottom plate between preform outer wall and frock inner wall, the external mechanism of bleeding of extraction opening is equipped with the heater in the outside of frock, the heater connection heating source form the device for preparing carbon-carbon composite.
The device for preparing the carbon-carbon composite material is characterized in that the heater is an induction heater or a resistance heater.
The device for preparing the carbon-carbon composite material comprises a tool cover plate, a tool main body and a tool bottom plate, wherein the tool main body is arranged on the tool bottom plate, the tool cover plate is arranged on the tool main body to enable the tool to form a cavity, an air inlet pipe is arranged on the tool cover plate, and at least one air suction opening is formed in the bottom surface of the tool bottom plate.
When the plurality of prefabricated bodies are arranged, the plurality of prefabricated bodies are arranged in a sleeved mode.
The device for preparing the carbon-carbon composite material is characterized in that when the number of the prefabricated bodies is three, the three prefabricated bodies are arranged into a prefabricated body C, a prefabricated body B and a prefabricated body A, a prefabricated body cover plate C is arranged at the opening end of the prefabricated body C, the prefabricated body B is sleeved outside the prefabricated body C, a prefabricated body cover plate B is arranged at the opening end of the prefabricated body B, the prefabricated body A is sleeved outside the prefabricated body B, a prefabricated body cover plate A is arranged at the opening end of the prefabricated body A, and air inlet pipe through holes are formed in the prefabricated body cover plate A, the prefabricated body cover plate B and the prefabricated body cover plate C respectively.
The device for preparing the carbon-carbon composite material is characterized in that when a plurality of tools are arranged, the plurality of tools are vertically overlapped.
The device for preparing the carbon-carbon composite material is characterized in that when the tool is set to be three, the three tools are stacked up and down, the tool bottom plate in the upper tool is arranged on the tool main body in the middle tool, the tool bottom plate in the middle tool is arranged on the tool main body in the lower tool, the upper tool, the middle tool and the lower tool are communicated through the air exhaust port in the tool bottom plate to form an air exhaust passage, the lower end of the air inlet pipe in the tool cover plate in the upper tool sequentially penetrates through the tool bottom plate in the upper tool and the tool bottom plate in the middle tool and then extends into the tool in the lower layer, a plurality of air outlets are formed in the outer edge surface of the air inlet pipe in the upper tool, and a plurality of air outlets are formed in the outer edge surface of the air inlet pipe in the middle tool.
According to the device for preparing the carbon-carbon composite material, the vertical plate is arranged below the tool bottom plate, the air pipe fixing plate is arranged below the vertical plate to form a closed cavity, the air pipe fixing plate is provided with the air exhaust pipe, and the air exhaust pipe is externally connected with the air exhaust mechanism.
In the device for preparing the carbon-carbon composite material, the gas mixer is respectively connected with a gas source and a carrier gas.
The device for preparing the carbon-carbon composite material is characterized in that the air exhaust mechanism comprises a vacuum pump, an air pipe and an air faucet, the air faucet is arranged on the air exhaust opening, and the air faucet is connected with the vacuum pump through the air pipe.
By adopting the technical scheme, the utility model has the following advantages:
the utility model has the characteristics of high deposition efficiency, good product performance, large development potential and the like, and is suitable for large-scale popularization and application.
Drawings
FIG. 1 is a schematic view of a first structure of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is a schematic view of a third structure according to the present invention;
FIG. 4 is a schematic gas flow diagram of the present invention;
in the figure: 1. an air inlet pipe; 2. a tooling cover plate; 3. a prefabricated cover plate A; 4. a prefabricated cover plate B; 5. a prefabricated cover plate C; 6. a preform C; 7. a preform B; 8. a preform A; 9. a tool main body; 10. a tooling bottom plate; 11. an induction heater; 12. an air exhaust pipe; 13. a trachea fixing plate; 14. a vertical plate; 15. an air extraction opening; 16. a furnace body; 17. an air outlet; 18. a resistance heater.
Detailed Description
The present invention will be explained in more detail by the following examples, which are not intended to limit the utility model;
it should be noted that the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., used in describing the structure of the present invention are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
With reference to the accompanying drawings 1-4, the device for preparing the carbon-carbon composite material comprises a heater, a prefabricated body cover plate, a tool, an air inlet pipe 1 and a furnace body 16, wherein a heat preservation layer is arranged on the inner wall of the furnace body 16, at least one closed tool is arranged in the furnace body 16, at least one prefabricated body is arranged in the tool, the prefabricated body cover plate is arranged at the opening end of the prefabricated body, the air inlet pipe 1 is arranged on a tool cover plate 2 in the tool, the lower end of the air inlet pipe 1 downwards penetrates through the prefabricated body cover plate to extend to the inside of the prefabricated body, the upper end of the air inlet pipe 1 penetrates through the furnace body 16 to be connected with an external gas mixer, the gas mixer is respectively connected with an air source and a carrier gas, and the gas of the air source is carbon-containing gas (mainly hydrocarbon gas), such as methane, natural gas, propane, butane and the like. The carrier gas is nitrogen, argon, hydrogen, helium and the like; the tool bottom plate 10 between the outer wall of the prefabricated body and the inner wall of the tool is provided with at least one air extraction opening 15, the air extraction opening 15 is externally connected with an air extraction mechanism, the air extraction mechanism can enable air in the tool to realize forced flow, and prevent the prefabricated body from crusting and blocking an air channel, during implementation, the air extraction mechanism comprises a vacuum pump, an air pipe and an air nozzle, the air nozzle is arranged on the air extraction opening 15, and the air nozzle is connected with the vacuum pump through the air pipe; the air exhaust mechanism can also be arranged into other devices with air exhaust function, a heater is arranged outside the tool, the heater is an induction heater 11 or a resistance heater 18, and the heater is connected with a heating source to form the device for preparing the carbon-carbon composite material.
The tool comprises a tool cover plate 2, a tool main body 9 and a tool bottom plate 10, wherein the tool main body 9 is arranged on the tool bottom plate 10, the tool cover plate 2 is arranged on the tool main body 9 to enable the tool to form a cavity, an air inlet pipe 1 is arranged on the tool cover plate 2, and at least one air suction opening 15 is formed in the bottom surface of the tool bottom plate 10. In implementation, when the plurality of air extraction openings 15 are provided, the plurality of air extraction openings 15 may be respectively connected to the air extraction mechanism through an air pipe, or the vertical plate 14 may be provided below the tool bottom plate 10, the air pipe fixing plate 13 is provided below the vertical plate 14 to form an enclosed cavity, at this time, the plurality of air extraction openings 15 are respectively located in the cavity of the enclosed cavity, so that the enclosed cavity may be communicated with the tool, the air pipe fixing plate 13 is provided with the air extraction pipe 12, and the air extraction pipe 12 is externally connected to the air extraction mechanism.
Further, as shown in fig. 1, 2 and 3, when a plurality of preforms are provided, the plurality of preforms are sleeved. When the number of the prefabricated bodies is three, the three prefabricated bodies are arranged into a prefabricated body C6, a prefabricated body B7 and a prefabricated body A8, a prefabricated body cover plate C5 is arranged at the opening end of the prefabricated body C6, a prefabricated body B7 is sleeved outside the prefabricated body C6, a prefabricated body cover plate B4 is arranged at the opening end of the prefabricated body B7, a prefabricated body A8 is sleeved outside the prefabricated body B7, a prefabricated body cover plate A3 is arranged at the opening end of the prefabricated body A8, and air inlet pipe through holes are formed in the prefabricated body cover plate A3, the prefabricated body cover plate B4 and the prefabricated body cover plate C5 respectively.
Further, as shown in fig. 2 and 3, when the plurality of tools are arranged, the plurality of tools are arranged in an up-and-down overlapping manner. When the tooling is set to be three, the three tooling is overlapped up and down, the tooling bottom plate 10 in the upper layer tooling is arranged on the tooling main body 9 in the middle layer tooling, the tooling bottom plate 10 in the middle layer tooling is arranged on the tooling main body 9 in the lower layer tooling, the upper layer tooling, the middle layer tooling and the lower layer tooling are communicated through the air exhaust opening 15 on the tooling bottom plate 10 to form an air exhaust passage, the lower end of the air inlet pipe 1 in the tooling cover plate 2 in the upper layer tooling sequentially penetrates through the tooling bottom plate 10 in the upper layer tooling and the tooling bottom plate 10 in the middle layer tooling and then extends into the tooling in the lower layer, a plurality of air outlets 17 are arranged on the outer edge surface of the air inlet pipe 1 in the upper layer tooling, and a plurality of air outlets 17 are arranged on the outer edge surface of the air inlet pipe 1 in the middle layer tooling.
In the specific implementation of the utility model, the flow direction of the gas is as shown in fig. 4, the mixed gas can enter the tooling of the upper layer, the middle layer and the lower layer through the gas inlet pipe 1, then sequentially pass through the preform C6, the preform B7 and the preform A8, then enter the gas extraction pipe 12 through the gas extraction opening 15, and the gas is extracted by the gas extraction mechanism, when the gas extraction device is used for implementing the utility model, the heater heats the tooling main body 9 in the tooling, the tooling main body 9 uniformly transfers the heat to the preform A8, the preform B7 and the preform C6, at this time, because the temperature of the preform A8 close to the tooling main body 9 is the highest, the temperature of the preform B7 is slightly lower than that of the preform A8, the temperature of the preform C6 is the lowest, when the mixed gas flows out of the gas inlet pipe C6, the gas inlet pipe B7 and the preform A8, the carbon-containing gas in the mixed gas is adsorbed on the surface of the fiber, then carbon is converted into carbon, and the gas phase pyrolysis by-product molecule is desorbed and diffused and discharged out of the preform A8, The preform B7 and the preform C6, the final by-product is discharged out of the tool through the extraction opening 15, the carbon-containing gas is conveyed from inside to outside, and the deposition of pyrolytic carbon is advanced from high temperature to low temperature to complete densification, so that the deposition rate is improved, the uniformity of density is ensured, the surface crusting of the preform is effectively avoided, and the one-step forming of the preform can be realized.
In the implementation of the utility model, the main parameters for preparing the carbon-carbon composite material are as follows:
| heating temperature/. degree.C | Pressure/pa | Flow rate | Deposition time/hour | Incrustation | Uniformity of | Formation of carbon Black | Final density g/cm3 | Further deposit |
| 1050 | 3000 | 1 | 200 | Whether or not | Is that | Whether or not | 1.6 | Whether or not |
| 1150 | 133 | 0.5 | 280 | Whether or not | Is that | Whether or not | 1.55 | Whether or not |
| 1200 | 7000 | 1.2 | 180 | Whether or not | Is that | Whether or not | 1.45 | Whether or not |
The present invention is not described in detail in the prior art.
The embodiments selected for the purpose of disclosing the utility model, are presently considered to be suitable, it being understood, however, that the utility model is intended to cover all variations and modifications of the embodiments which fall within the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a device for preparing carbon-carbon composite, includes heater, preform apron, frock, intake pipe (1) and furnace body (16), characterized by: be equipped with at least one inclosed frock in furnace body (16) be equipped with at least one preform in the frock, be equipped with the preform apron at the open end of preform, be equipped with intake pipe (1) on frock apron (2) in the frock, the lower extreme of intake pipe (1) passes the preform apron downwards and extends to the inside of preform, and the upper end of intake pipe (1) is passed furnace body (16) and is connected outside gas mixer, is equipped with at least one extraction opening (15) on frock bottom plate (10) between preform outer wall and the frock inner wall, the external mechanism of bleeding of extraction opening (15) is equipped with the heater in the outside of frock, the heater connection heating source form the device that is used for preparing carbon-carbon combined material.
2. The apparatus for preparing a carbon-carbon composite material as set forth in claim 1, wherein: the heater is an induction heater (11) or a resistance heater (18).
3. The apparatus for preparing a carbon-carbon composite material as set forth in claim 1, wherein: the tool comprises a tool cover plate (2), a tool main body (9) and a tool bottom plate (10), wherein the tool main body (9) is arranged on the tool bottom plate (10), the tool cover plate (2) is arranged on the tool main body (9) to enable the tool to form a cavity, an air inlet pipe (1) is arranged on the tool cover plate (2), and at least one air suction opening (15) is formed in the bottom surface of the tool bottom plate (10).
4. The apparatus for preparing a carbon-carbon composite material as set forth in claim 1, wherein: when the prefabricated part sets up to a plurality of, a plurality of prefabricated parts are for cup jointing the setting.
5. The apparatus for preparing a carbon-carbon composite material as set forth in any one of claims 1 or 4, wherein: when the prefabricated part sets up to three, three prefabricated part sets up to prefabricated part C (6), prefabricated part B (7) and prefabricated part A (8) the open end of prefabricated part C (6) is equipped with prefabricated part apron C (5), cup joints prefabricated part B (7) in the outside of prefabricated part C (6) the open end of prefabricated part B (7) is equipped with prefabricated part apron B (4), cup joints prefabricated part A (8) in the outside of prefabricated part B (7) the open end of prefabricated part A (8) is equipped with prefabricated part apron A (3) be equipped with the intake pipe perforation on prefabricated part apron A (3), prefabricated part apron B (4) and the prefabricated part apron C (5) respectively.
6. The apparatus for preparing a carbon-carbon composite material as set forth in claim 1, wherein: when the frock sets up to a plurality ofly, stack setting about a plurality of frocks.
7. The apparatus for preparing a carbon-carbon composite material as claimed in any one of claims 1, 3 or 6, wherein: when the tool is three, the three tools are stacked up and down, a tool bottom plate (10) in the upper tool is arranged on a tool main body (9) in the middle tool, the tool bottom plate (10) in the middle tool is arranged on the tool main body (9) in the lower tool, the upper tool, the middle tool and the lower tool are communicated through an air exhaust opening (15) in the tool bottom plate (10) to form an air exhaust passage, the lower end of an air inlet pipe (1) in a tool cover plate (2) in the upper tool sequentially penetrates through the tool bottom plate (10) in the upper tool and the tool bottom plate (10) in the middle tool and then extends into the lower tool, a plurality of air outlets (17) are formed in the outer edge surface of the air inlet pipe (1) in the upper tool, and a plurality of air outlets (17) are formed in the outer edge surface of the air inlet pipe (1) in the middle tool.
8. The apparatus for preparing a carbon-carbon composite material as set forth in any one of claims 1 or 3, wherein: the tool is characterized in that a vertical plate (14) is arranged below the tool bottom plate (10), a gas pipe fixing plate (13) is arranged below the vertical plate (14) to form a closed cavity, a gas extraction pipe (12) is arranged on the gas pipe fixing plate (13), and the gas extraction pipe (12) is externally connected with a gas extraction mechanism.
9. The apparatus for preparing a carbon-carbon composite material as set forth in claim 1, wherein: the gas mixer is respectively connected with a gas source and a carrier gas.
10. The apparatus for preparing a carbon-carbon composite material as set forth in claim 1, wherein: the air exhaust mechanism comprises a vacuum pump, an air pipe and an air faucet, wherein the air faucet is arranged on the air exhaust port (15), and the air faucet is connected with the vacuum pump through the air pipe.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136570A (en) * | 2021-04-09 | 2021-07-20 | 郭李梁 | Device for preparing carbon-carbon composite material |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136570A (en) * | 2021-04-09 | 2021-07-20 | 郭李梁 | Device for preparing carbon-carbon composite material |
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