CN101671188A - Gas flow control method of rapid directional infiltration for high-performance carbon-based composite material - Google Patents
Gas flow control method of rapid directional infiltration for high-performance carbon-based composite material Download PDFInfo
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- CN101671188A CN101671188A CN200910093946A CN200910093946A CN101671188A CN 101671188 A CN101671188 A CN 101671188A CN 200910093946 A CN200910093946 A CN 200910093946A CN 200910093946 A CN200910093946 A CN 200910093946A CN 101671188 A CN101671188 A CN 101671188A
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Abstract
An gas flow control method of rapid directional infiltration for carbon-based composite material includes four steps: step 1: input of gas: regulating the flow rate of a plurality of gases such as carbon source gas-natural gas, propane, diluent gas-hydrogen and the like through a gas control valve and a proton flux meter to obtain required flow rate and mixture ratio; step 2: mixing of gases: mixing the plurality of gases through a plurality of layers of graphite circular plates with holes and gaskets in a gas mixing device; step 3: preheating of gas: preheating gas flow through a preheating device in a furnace uniform temperature zone in quite short time; and step 4: output of gas and infiltration furnace pressure control: extracting gas flow by a vacuum pump and regulating the furnace pressure through an electric actuator to achieve optimal infiltration effect. The method can effectively mix, pretreat and directionally diffuse gas flow, realize the gradual deposition of pyrolytic carbon from the inside of preform to the outside and improve infiltration speed and the utilization rate of precusor, and has broad practical value and application prospect in the technical field of carbon-based composite materials.
Description
(1) technical field
The present invention relates to a kind of high-performance carbon-based composite material and ooze the pneumatosis flow control technology, particularly relate to the method that the pneumatosis current control is oozed in a kind of high-performance carbon-based composite material slewing, belong to the based composite material of carbon technical field.
(2) background technology
Based composite material of carbon has been made into aeroplane brake discs and rocket nozzle etc. and has been applied to aerospace field owing to its unique mechanical and heat physical properties.At present, each based composite material of carbon production company of the world mainly adopts Sweet natural gas, propylene, propane etc. to prepare the carbon fiber reinforced carbon based composites as carbon-source gas and hydrogen, nitrogen etc. as diluent gas.Based composite material of carbon ooze air-flow control in the long-pending preparation process determining pyrolytic carbon structure, ooze long-pending speed speed, pyrolytic carbon precursor utilization ratio and ooze long-pending process stability etc.Gas oozes long-pending indoor sooty generation unreasonable the causing easily of the diffusion of oozing long-pending chamber, and the based composite material of carbon density unevenness is even, and the pyrolytic carbon structure is inconsistent, results such as performance carbon-based composite material difference.Gas ooze long-pending indoor effective mixing, preheating and in order diffusion etc. can accelerate precursor prefabricated intravital ooze long-pending, obtain the uniform texture pyrolytic carbon, improve the presoma utilization ratio, solve that present based composite material of carbon preparation cycle is long, pyrolytic carbon precursor utilization ratio is low, ooze long-pending process precast body surface crust and need repeatedly mechanical workout problem such as shell easily.
(3) summary of the invention
1, purpose: in order to overcome prior art surperficial easily crust in preparation based composite material of carbon process, sedimentation rate is slow, shortcomings such as products production cost height, the invention provides a kind of high-performance carbon-based composite material slewing and ooze the method for pneumatosis current control, it can effectively make gas mixing, preheating and directed diffusion, realize that pyrolytic carbon deposits and at carbon fiber surface depositional texture homogeneous pyrolytic carbon gradually from precast body inside to the outside, improved and oozed long-pending speed and precursor utilization ratio, avoided effectively oozing sooty generation in the long-pending process in slewing.
2, technical scheme:
As shown in Figure 1, the pneumatosis flow control device is oozed in a kind of high-performance carbon-based composite material slewing, and it is exported by gas flow control device, gas mixer, gas preheating unit and gas and ooze long-pending furnace pressure device four parts and forms.Connection between them, position relation is: gas flow control device is connected with inlet mouth on the gas mixer by pipeline; Gas preheating unit is positioned on the gas mixer, and they all are placed on oozes within the long-pending furnace wall; Gas output and ooze long-pending furnace pressure device and be connected with air outlet on the gas mixer by pipeline.
Described gas flow control device is made up of gas valve, proton under meter, pipeline;
Described gas mixer is made up of graphite plectane with holes, pad, graphite cylinder, inlet mouth;
Described gas preheating unit is by the air outlet, ooze long-pending furnace wall, heating graphite sleeve, graphite cover plate, Graphite pad, precast body, graphite guiding device, through hole, graphite plectane, graphite plectane with holes and form;
Described gas is exported and is oozed long-pending furnace pressure device, is made up of gas quench system, YE, vacuum pump, exhaust gas processing device, gas valve.
A kind of carbon-based composite material through rapid directional infiltration flow controlling method of air of the present invention, these method concrete steps are as follows:
Step 1: the input of gas: precast body is placed in by Fig. 1 oozes in the long-pending stove, cover the graphite cover plate, vacuumize the heating prefabricated component, regulate the flow of multiple gases such as carbon-source gas Sweet natural gas, propane and diluent gas hydrogen by gas control valve and proton under meter, with flow and the proportioning that need to obtain;
Wherein, oozing the interior vacuum tightness of the stove that amasss stove is-0.1MPa;
Step 2: the mixing of gas: it is the water conservancy diversion graphite cylinder that multiple gases such as above-mentioned carbon-source gas Sweet natural gas, propane and diluent gas hydrogen enter the graphite guiding device, by graphite plectane with holes of the multilayer in the gas mixer and pad, multiple gases mixes, the pyrolytic carbon structure that can avoid the precast body different positions to ooze after amassing is different, causes the based composite material of carbon each several part performance of oozing after amassing inconsistent;
Wherein, the thickness of graphite plectane is 10mm～15mm;
Wherein, the thickness of pad is 15～25mm;
Wherein, the height of water conservancy diversion graphite cylinder is 200mm～300mm.
Step 3: the preheating of gas: multiple gases such as above-mentioned carbon-source gas Sweet natural gas, propane and diluent gas hydrogen are passed through primary heater unit, uniform temperature zone preheating in the inherent stove of very short time.When warm can make above-mentioned multiple gases arrive prefabricated component, temperature reaches oozed the accumulated temperature degree, improved gas effciency;
Step 4: the output of gas and ooze long-pending furnace pressure control: vacuum pump is extracted multiple gases such as above-mentioned carbon-source gas Sweet natural gas, propane and diluent gas hydrogen out, regulate furnace pressure by YE, controlled and oozed long-pending furnace pressure and air-flow is oozing long-pending residing time in furnace, reached the best and ooze long-pending effect.
Wherein, gas quench system is installed in before the YE, the parallel installation with gas valve of YE.
3, advantage and effect: the present invention compared with prior art has the following advantages:
1) accumulation of multilayer graphite cake with holes, frock is simple, but has realized that well multiple gases is mixed in stove and preliminary preheating is carried out simultaneously, has saved energy consumption.Particularly ooze fast when long-pending for the big flow of gas, the mixing of gas and preliminary preheating are very necessary.
2) multiple gases has well realized the air-flow preheating in the preheating of oozing long-pending stove isothermal region, and when guaranteeing that air-flow arrives preform surfaces, temperature reaches predetermined temperature.
3) can well the condition furnace pressure and the air-flow residence time by electronic modulator and vacuum pump, guarantee to obtain the pyrolytic carbon of predetermined structure tissue.
4) it is long-pending that the technology of the present invention can be generalized to oozing of SiC matrix, and the slewing of suitable complex structural member is oozed long-pending, and air current flow is unobstructed, can not form " dead band " in oozing long-pending stove, effectively suppresses the generation of impurity such as carbon black.
(4) description of drawings
The structural representation of Fig. 1 the invention process equipment
Nomenclature is as follows among the figure:
The 1-air outlet; 2-oozes long-pending furnace wall; 3-heating graphite sleeve;
4-graphite cover plate; The 5-Graphite pad; The 6-precast body;
7-graphite guiding device; The 8-through hole; 9-graphite plectane;
10-graphite plectane with holes; The 11-pad; The 12-graphite cylinder;
The 13-inlet mouth; The 14-gas control valve; 15-proton under meter;
The 16-gas flow control device; 17-gas is exported and is oozed and amasss the furnace pressure device; The 18-gas mixer;
The 19-gas preheating unit; The 20-gas quench system; The 21-YE; The 22-vacuum pump;
The 23-exhaust gas processing device; The 24-gas valve.
(5) embodiment:
As shown in Figure 1, a kind of carbon-based composite material through rapid directional infiltration flow controlling method of air of the present invention, ooze in the pneumatosis flow control device in slewing and to implement, this operating device is by gas flow control device 16, gas mixer 18, gas preheating unit 19 and gas are exported and are oozed long-pending furnace pressure device 17 4 parts and form.Connection between them, position relation is: gas flow control device 16 is connected with inlet mouth 13 on the gas mixer 18 by pipeline; Gas preheating unit 19 is positioned on the gas mixer 18, and they all are placed on oozes within the long-pending furnace wall 2; Gas output and ooze long-pending furnace pressure device 17 and be connected with air outlet 1 on the gas mixer 18 by pipeline.
Described gas flow control device 16 is made up of gas valve 14, proton under meter 15, pipeline;
Described gas mixer 18 is made up of graphite plectane 10 with holes, pad 11, graphite cylinder 12, inlet mouth 13;
Described gas preheating unit 19 is by air outlet 1, ooze long-pending furnace wall 2, heating graphite sleeve 3, graphite cover plate 4, Graphite pad 5, precast body 6, graphite guiding device 7, through hole 8, graphite plectane 9, graphite plectane 10 with holes and form;
Described gas is exported and is oozed long-pending furnace pressure device 17, is made up of gas quench system 20, YE 21, vacuum pump 22, exhaust gas processing device 23, gas valve 24.
A kind of carbon-based composite material through rapid directional infiltration flow controlling method of air of the present invention, these method concrete steps are as follows: step 1: precast body 6 is placed in by Fig. 1 oozes in the long-pending stove, cover graphite cover plate 4, vacuumize the heating prefabricated component, when preform temperatures reaches the temperature that needs, open gas control valve 14, proton under meter 15 is set to target flow, multiple gases such as carbon-source gas Sweet natural gas, propane and diluent gas hydrogen enter from inlet mouth 13 oozes in the long-pending stove.
Wherein, oozing the interior vacuum tightness of the stove that amasss stove is-0.1MPa;
Step 2: multiple gases such as above-mentioned carbon-source gas Sweet natural gas, propane and diluent gas hydrogen enter water conservancy diversion graphite cylinder 12, placement of multiple layers graphite plectane 10 with holes in the cylinder 12, use pad 11 between the graphite plectane 10 with holes, the thickness of pad 11 is 20mm, the thickness of graphite plectane 10 is 12mm, the height of graphite guiding device 7 is 250mm, and above-mentioned multiple gases is unordered flowing between graphite plectane with holes, realizes effective mixing of multiple gases.
Step 3: multiple gases such as above-mentioned carbon-source gas Sweet natural gas, propane and the diluent gas hydrogen of mixing flow out from through hole 8 again after isothermal region then by the pipe flow in the primary heater unit 19, and the air-flow directed flow is by precast body, in the precast body inside deposition.
Step 4: close gas output and ooze the gas valve 24 that amasss in the furnace pressure device 17, by YE 21 control furnace pressures, multiple gases such as above-mentioned carbon-source gas Sweet natural gas, propane and diluent gas hydrogen are extracted out by vacuum pump 22, are undertaken discharging after the aftertreatment by exhaust gas processing device 17.Gas quench system 20 is installed in before the YE 21, YE 21 and gas valve 24 parallel installations.According to oozing long-pending different steps of carrying out, by control proton under meter 15 and YE 21, regulate the flow of air-flow and ooze long-pending furnace pressure, obtain the fastest oozing and amass speed and best pyrolytic carbon structure.After oozing long-pending the end, open gas output and ooze the gas valve 24 that amasss in the furnace pressure device 17, will ooze long-pending furnace gas and vacuumize cooling.
Claims (6)
1, a kind of carbon-based composite material through rapid directional infiltration flow controlling method of air, these method concrete steps are as follows:
Step 1: the input of gas: precast body is placed in oozes in the long-pending stove, cover the graphite cover plate, vacuumize the heating prefabricated component, by the flow of gas control valve and proton under meter adjusting carbon-source gas Sweet natural gas, propane and these gases of diluent gas hydrogen, with flow and the proportioning that need to obtain;
Step 2: the mixing of gas: it is the water conservancy diversion graphite cylinder that multiple gases such as above-mentioned carbon-source gas Sweet natural gas, propane and diluent gas hydrogen enter the graphite guiding device, by graphite plectane with holes of the multilayer in the gas mixer and pad, multiple gases mixes, the pyrolytic carbon structure that can avoid the precast body different positions to ooze after amassing is different, causes the based composite material of carbon each several part performance of oozing after amassing inconsistent;
Step 3: the preheating of gas: above-mentioned carbon-source gas Sweet natural gas, propane and diluent gas hydrogen gas mixture pass through primary heater unit, uniform temperature zone preheating in the inherent stove of very short time, when warm can make above-mentioned these gases arrive prefabricated component, temperature reaches oozes the accumulated temperature degree, improves gas effciency;
Step 4: the output of gas and ooze long-pending furnace pressure control: vacuum pump is extracted above-mentioned carbon-source gas Sweet natural gas, propane and diluent gas hydrogen gas mixture out, regulate furnace pressure by YE, ooze long-pending furnace pressure and air-flow is oozing long-pending residing time in furnace with control, reach the best and ooze long-pending effect.
2, a kind of carbon-based composite material through rapid directional infiltration flow controlling method of air according to claim 1 is characterized in that: ooze long-pending stove described in the step 1, vacuum tightness is-0.1MPa in its stove.
3, a kind of carbon-based composite material through rapid directional infiltration flow controlling method of air according to claim 1, it is characterized in that: the graphite plectane described in the step 2, its thickness are 10mm～15mm.
4, a kind of carbon-based composite material through rapid directional infiltration flow controlling method of air according to claim 1, it is characterized in that: the pad described in the step 2, its thickness are 15～25mm.
5, a kind of carbon-based composite material through rapid directional infiltration flow controlling method of air according to claim 1, it is characterized in that: the height of the water conservancy diversion graphite cylinder described in the step 2 is 200mm～300mm.
6, a kind of carbon-based composite material through rapid directional infiltration flow controlling method of air according to claim 1, it is characterized in that: the gas quench system described in the step 4 is installed in before the YE, the parallel installation with gas valve of YE.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330070A (en) * | 2011-10-20 | 2012-01-25 | 西安航空制动科技有限公司 | Preheating device for chemical vapor deposition furnace |
| CN102420120A (en) * | 2011-11-04 | 2012-04-18 | 中国科学院微电子研究所 | Air inlet structure |
| CN104446585A (en) * | 2013-09-24 | 2015-03-25 | 江门市硕普科技开发有限公司 | Method for rapidly preparing high-density carbon/carbon composite material in batches |
| CN111072397A (en) * | 2019-12-03 | 2020-04-28 | 北京优材百慕航空器材有限公司 | Carbon/carbon composite material brake disc and preparation method thereof |
| CN114411115A (en) * | 2021-12-09 | 2022-04-29 | 安徽绿能技术研究院有限公司 | Double-loop double-carbon-source rapid directional vapor deposition method |
-
2009
- 2009-09-23 CN CN200910093946A patent/CN101671188A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330070A (en) * | 2011-10-20 | 2012-01-25 | 西安航空制动科技有限公司 | Preheating device for chemical vapor deposition furnace |
| CN102420120A (en) * | 2011-11-04 | 2012-04-18 | 中国科学院微电子研究所 | Air inlet structure |
| CN102420120B (en) * | 2011-11-04 | 2016-08-03 | 中国科学院微电子研究所 | Air inlet structure |
| CN104446585A (en) * | 2013-09-24 | 2015-03-25 | 江门市硕普科技开发有限公司 | Method for rapidly preparing high-density carbon/carbon composite material in batches |
| CN104446585B (en) * | 2013-09-24 | 2018-04-17 | 江门市硕普科技开发有限公司 | The method that batch quickly prepares high-density carbon/carbon composite material |
| CN111072397A (en) * | 2019-12-03 | 2020-04-28 | 北京优材百慕航空器材有限公司 | Carbon/carbon composite material brake disc and preparation method thereof |
| CN114411115A (en) * | 2021-12-09 | 2022-04-29 | 安徽绿能技术研究院有限公司 | Double-loop double-carbon-source rapid directional vapor deposition method |
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Inventor after: Luo Ruiying Inventor after: Zhang You Inventor after: Zhang Jincao Inventor after: Zhang Yunfeng Inventor after: Hu Yujie Inventor after: Li Jinsong Inventor before: Luo Ruiying Inventor before: Zhang Jincao Inventor before: Zhang Yunfeng Inventor before: Hu Yujie Inventor before: Li Jinsong |
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Free format text: CORRECT: INVENTOR; FROM: LUO RUIYING ZHANG JINCAO ZHANG YUNFENG HU YUJIE LI JINSONG TO: LUO RUIYINGZHANG YOU ZHANG JINCAO ZHANG YUNFENG HU YUJIE LI JINSONG |
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Application publication date: 20100317 |