CN1438359A - Method for coating SIC protection layer on surface of carbon fiber weaved article - Google Patents
Method for coating SIC protection layer on surface of carbon fiber weaved article Download PDFInfo
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- CN1438359A CN1438359A CN 03104595 CN03104595A CN1438359A CN 1438359 A CN1438359 A CN 1438359A CN 03104595 CN03104595 CN 03104595 CN 03104595 A CN03104595 A CN 03104595A CN 1438359 A CN1438359 A CN 1438359A
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Abstract
The invention relates to a method of smearing a layer of SIC on carbon fiber (including graphite carbon fiber) basketwork, the invention uses parallel double lines high frequency inductive coil to approach the surface of carbon fiber and drive strong vortex to form the partial high temperature, at the same time, sprays trichloromethyl-silicon hydride and hydrogen to the high temperature part, after reaction the created SIC subsides in the part and forms a tight SIC protective layer. It uses inductive coil and the scan displacement of synchronous nozzle to plate a layer of SIC protective layer. The process is in a closed container, the trichloromethyl-silicon hydride can be circulated to be used again, the product HC1 can be separated by chemical method.
Description
Technical field
The invention belongs to method to carbon fiber (comprising graphitized carbon fibre) and the processing of continuity product high-temp antioxidizing thereof.
Background technology
Carbon fiber (comprising graphitized carbon fibre) becomes the first-selection of matrix material with its distinctive high specific strength and is used widely, but it is in air ambient, particularly easily oxidation and being greatly limited under the hot environment.Yet carbon fiber is done matrix material and is applied in the aerospace field more, and its operating ambient temperature rangeability of living in is very big, how to prevent that oxidation is an important problems in the structure design.
Silicon carbide has good high-temperature adaptability and ideal intensity and hardness, but common method is difficult to realize the coating of SIC layer to carbon fiber, comes ideal as the protective layer of carbon fiber in field of compound material with the SIC top coat.But do not find the method that realizes this purpose technology up to now, and become this area scientific and technical personnel popular research topic.
Summary of the invention
The objective of the invention is to design the method that directly applies the SIC layer on the surface for carbon fiber preform.
The present invention's design utilizes radio-frequency induction coil can inspire a powerful induced current at the carbon fiber preform surface layer, the instantaneous high temperature of local top layer generation more than 1000 ℃ that makes of the inductive loop that is produced, if the mode at high-temperature area winding-up trichloromethyl silane and hydrogen makes the vapour deposition at high-temperature area generation SIC simultaneously, just can form the mortise on SIC layer and carbon fiber top layer.Continuous mobile ruhmkorff coil and will be connected with the nozzle synchronous shift of reaction mixture gas; make and produce the outside surface that induction pyritous fabric face localized regions of elevated temperature scans whole fabrics; SIC vapour deposition layer region also expands to whole outside surfaces thereupon simultaneously; form complete and fine and close SIC upper layer coating, this has just formed the protection against oxidation layer under the complete high temperature.The above course of processing is carried out in encloses container, operates in to finish under the atmosphere that keeps trichloromethyl silane in the encloses container.
The objective of the invention is how to realize below in conjunction with the processing sketch that provides is furthermore bright.
Description of drawings
Fig. 1 is a working method synoptic diagram of the present invention.
Wherein 1 represent encloses container, 1A represents the inflation inlet of trichloromethyl silane, and 1B is the tail gas venting port, 2 is carbon fiber preform to be processed, 2A is the shape tire, and 2B is a turning axle, and 3 is parallel wire formula high-frequency induction coil, 4 is trichloromethyl silane and hydrogen gas mixture nozzle, 4A is the inflation inlet of trichloromethyl silane and hydrogen mixed gas, and 5 are the location ceramics bracket, and 6 representatives make the servo control mechanism of ruhmkorff coil and nozzle synchronous shift, 7 represent high frequency electric source, and 8 represent the match and regulate device.
Embodiment
From given accompanying drawing 1 device synoptic diagram method involved in the present invention, come down to the coating district by district of the SIC layer realized by the vapor deposition reaction mixed gas nozzle 4 of the high-frequency induction heating coil 3 of dynamic scanning type and synchronous shift, trichloromethyl silane mixes back public affairs under 1200 ℃～1350 ℃ hot conditionss and reacts with hydrogen, chlorine atom and hydrogen are combined into HCL and discharge with tail gas.Under depositing, the SIC that is generated forms the SIC coating in red-hot zone, along with driving the deposition region, servo control mechanism can the SIC coating be arrived whole fabrics top layer with process spread in the displacement of full surface scan formula, this braiding body to plane, the combination of rotation geometry face all can be realized, only be the design and the matching problem of servo control mechanism.
The radio-frequency generator of being taked 7 is taked 13.56M industry HF oscillation power supply, by matching box 8 high-frequency energy is added on the parallel wire induction coil 3, will when coil is adjusted to apart from carbon fibre fabric top layer 5～15mm, motivate powerful inductive loop and form 1200 ℃～1350 ℃ high temperature, create condition for producing vapor deposition reaction at the carbon fiber surface layer.
Parallel lines spacing in the parallel wire formula ruhmkorff coil is between 10mm～20mm, the centre is provided with a flat mouthful of nozzle 4, the mixed gas of three chloromethane chlorosilanes and the hydrogen of feeding is sprayed on 1200 ℃～1350 ℃ red-hot carbon fibre fabric top layer just, the SIC that produces the generation of reaction back is deposited on the heating zone, the HCL that is generated becomes tail gas with excessive trichloromethyl silane and discharges, and after the HCL in the tail gas is absorbed the trichloromethyl silane gas recovery in the tail gas is utilized again.
Parallel wire formula ruhmkorff coil 3 is contained on the same movably ceramics bracket 5 with flat-shaped nozzle 4 mutual group, ceramics bracket 5 is positioned at movably on the servo control mechanism 6, the jet direction of the outlet of nozzle 4 is pointed in the eddy current heating region under the high-frequency induction, along with the moving of ceramics bracket 5, the two synchronous shift realizes the operation of coating district by district to the carbon fiber scan-type like this.If this moment, specific product that carbon fiber preform is made was with mold 2A supporting and shaping, and corresponding ruhmkorff coil 3 and nozzle 4 are done relative motion under slowly driving under the driving of servo control mechanism 6.
If the then corresponding servo control mechanism of single plane or rotation geometry face is simple driven in parallel only just, or rotation drives.If plane, rotation geometry face in conjunction with body, the driving mechanism in its process operation is done corresponding design, and is a bit complicated, still can adopt method of the present invention to finish complex-curved SIC layer coating.
Utilize method of the present invention; all processing is to finish in encloses container 1; and in trichloromethyl silane atmosphere, carry out; can realize the carbon fibre fabric top layer of complicated shape is realized the coating of SIC layer easily; thereby make carbon fiber obtain the strong high temperature protection layer of one deck, make its application that adaptability widely be arranged.
Claims (6)
1, the method for carbon fiber preform surface applied SIC coating; it is characterized in that this method is to take to make the corresponding regional area of textile surface at generation induction high temperature the SIC vapour deposition take place simultaneously to the mode of winding-up trichloromethyl silane and hydrogen mixed gas in the heating of fabric face local high-frequency in airtight container (1); the nozzle (4) of continuous mobile induction heating induction coil (3) and synchronous mobile response gas mixture; make induction heating and the whole textile surface of vapour deposition sector scan, can form the anti-oxidant SIC protective layer on carbon fiber preform surface.
2, according to the said method of claim 1, its feature is the industrial HF oscillation power supply of 13.56MHZ at the high frequency electric source of being taked (7), is carried on the parallel wire ruhmkorff coil (3) by matching box (8).
3, according to the said method of claim 2, the spacing that it is characterized in that run-in index ruhmkorff coil (3) is 10～20mm, keep 5～15mm with processed carbon fibre fabric surface spacing when it is used, regulate power and apply and to make 1200 ℃～1350 ℃ high temperature of regional area generation.
4, according to the said method of claim 1, it is characterized in that the required mixed gas nozzle (4) of radio-frequency induction coil (3) and gas-phase reaction is assembled into one by ceramics bracket (5), the direction of nozzle (4) is pointed to and is produced the high-frequency vortex heating region, and nozzle (4) and ruhmkorff coil (3) be same moved further under servo control mechanism drives.
5,, it is characterized in that the carbon fiber textile surfaces does relative motion realization to the whole outerplanar spraying scanning of carbon fiber preform with respect to ruhmkorff coil (3) and gas-phase reaction gas jet (4) under servo control mechanism drives according to the said method of claim 4.
6, according to the said method of claim 1, it is characterized in that carbon fiber preform is plane, also can be made into rotation geometry body shape, the servo control mechanism of corresponding spraying scanning is parallel moving mechanism or rotary drive mechanism, the area of application of SIC is expanded to the top layer of whole cloth by relative movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03104595 CN1209492C (en) | 2003-02-20 | 2003-02-20 | Method for coating SIC protection layer on surface of carbon fiber weaved article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03104595 CN1209492C (en) | 2003-02-20 | 2003-02-20 | Method for coating SIC protection layer on surface of carbon fiber weaved article |
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| Publication Number | Publication Date |
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| CN1438359A true CN1438359A (en) | 2003-08-27 |
| CN1209492C CN1209492C (en) | 2005-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03104595 Expired - Fee Related CN1209492C (en) | 2003-02-20 | 2003-02-20 | Method for coating SIC protection layer on surface of carbon fiber weaved article |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100345006C (en) * | 2005-06-29 | 2007-10-24 | 中国人民解放军国防科学技术大学 | Preparation method of dense silicon carbide coating layer for optical reflection mirrow |
| CN104947074A (en) * | 2014-11-19 | 2015-09-30 | 叶羽敏 | Textile surface high-polymer coating method based on chemical vapor deposition |
-
2003
- 2003-02-20 CN CN 03104595 patent/CN1209492C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100345006C (en) * | 2005-06-29 | 2007-10-24 | 中国人民解放军国防科学技术大学 | Preparation method of dense silicon carbide coating layer for optical reflection mirrow |
| CN104947074A (en) * | 2014-11-19 | 2015-09-30 | 叶羽敏 | Textile surface high-polymer coating method based on chemical vapor deposition |
| CN104947074B (en) * | 2014-11-19 | 2019-07-05 | 宁波聚膜新材料科技有限公司 | A kind of textile surfaces high molecular film method based on chemical vapor deposition |
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| Publication number | Publication date |
|---|---|
| CN1209492C (en) | 2005-07-06 |
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