CN104652120A - Technology and device for coating surfaces of carbon fibers with silicon carbide - Google Patents
Technology and device for coating surfaces of carbon fibers with silicon carbide Download PDFInfo
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- CN104652120A CN104652120A CN201310599601.4A CN201310599601A CN104652120A CN 104652120 A CN104652120 A CN 104652120A CN 201310599601 A CN201310599601 A CN 201310599601A CN 104652120 A CN104652120 A CN 104652120A
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- carbon fiber
- chlorosilane
- carbon fibers
- silicon carbide
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Abstract
The invention discloses a technology and device for coating surfaces of carbon fibers with silicon carbide. The device is an improved 3 radio frequency focusing heater. Through a focusing electromagnetic field, carbon fibers are heated to a temperature of 1100-1300 DEG C, and a chlorosilane and high-purity hydrogen reaction environment is constructed in a quartz tube or reactor so that chlorosilane cracks to produce hydrogen chloride and a silicon carbide gas phase is deposited on the surfaces of the carbon fibers so that a high temperature-resistant surface coating is formed.
Description
Technical field
The present invention relates to improving further and supplementary technology of a kind of radio frequency method carbon fiber and graphite metallization processes, is also the improvement prepared the existing radio frequency of production high-quality graphite fibre.
Background technology
The processing technology of carbon fiber and graphite, obtains larger progress, greatly reduces the energy consumption in production technology, improve quality, reduce cost, thus be extremely conducive to application and the popularization of graphitized carbon fibre after have employed radio frequency method processing.As a kind of structural material with outstanding mechanical property, that produces compared with traditional graphite electric furnace process has truly had significant progress.New device and technique do not change the chemical characteristic that Traditional Method produces graphitized carbon fibre.Particularly oxidizable in high temperature environments, and make its mechanical property be subject to serious threat and destruction, there will be strong reaction with metal material compound tense, and the mechanical properties decrease of material after making compound.How improve the chemical quality of graphitized carbon fibre by the advance of radio frequency method processing carbon fiber product technology and equipment further, thus make this fiber obtain qualitative leap just to become the problem that processing industry is extremely urgent for this reason.
Summary of the invention
The object of the invention is to utilize radio frequency focusing formula heater to realize the object of the resistant to elevated temperatures carborundum surface layer of carbon fiber (graphite fibre) coated.
To achieve these goals, technical scheme of the present invention is as follows:
The high frequency linearity focused electromagnetic formed by radio frequency focusing formula heater is to the carbon fiber heating in motion, the reaction environment of a chlorosilane and high-purity hydrogen is manufactured in quartz tube reactor, make chlorosilane cracking generate carborundum vapour deposition while hydrogen chloride at carbon fiber surface, form resistant to elevated temperatures face coat.The hydrogen chloride generated in reaction is discharged reactor and is absorbed by limewash.Continue through focused electromagnetic along with carbon fiber and be heated to 1100 ~ 1300 DEG C, reverse chlorosilane and the high-purity hydrogen of being filled with will react thereupon form one deck SiC coating on the surface of carbon fiber, speed, the reaction temperature of suitable grasp wire and be filled with amount of reactant gases, can the thickness of control surface coating.
Accompanying drawing explanation
Fig. 1 is special-purpose radio-frequency heater structural representation of the present invention.
Wherein: 1. radio-frequency generator, 2. radio frequency adaptation, 3. radio-frequency cable, 4. RF-coupled chamber, 5. quartz tube reactor, 5A. mist adds entrance, 5B. hydrogen chloride bleeding point, 5C, 5D. seal Ar inlet, 6. mix gas distributing chamber, 6A. chlorosilane flowmeter, 6B. hydrogen flowmeter, 7. chlorosilane source of the gas, 8. High Purity Hydrogen source of the gas, 9. carbon fiber, 10,11. carbon fiber folding and unfolding silk mechanisms.
Detailed description of the invention
As shown in Figure 1, specific embodiments of the invention mainly comprise the following steps:
When carbon fiber 9 is by quartz tube reactor 5, be easy to sensedly in radio frequency focusing district be heated to 1100 ~ 1300 DEG C, to the gaseous mixture along carbon fiber sport reverse sourcing chlorosilane and high-purity hydrogen in quartz tube reactor (5), form a reaction environment, realize SiC while making chlorosilane cracking generate hydrogen chloride and be deposited on celion surface formation coating.
Carbon fiber 9 realizes motion by folding and unfolding silk mechanism 10,11, and through quartz tube reactor 5, its wire velocity control is at 2-2.5 m/min.The flow of the chlorosilane be filled with is 0.5-0.8 l/h, the charge of high-purity hydrogen is 0.3-0.6 l/h, two ends sealing argon gas charge is 0.3-0.5 l/h, and can ensure the standard reaction atmosphere in quartz tube reactor, the purity requirement of high-purity hydrogen reaches 99.99%.
The special equipment structure realizing coating silicon carblde on carbon fiber surface comprises radio-frequency generator 1, radio frequency adaptation 2, RF-coupled chamber 4, be connected to the radio-frequency cable 3 between adaptation 2 and coupling cavity 4, the quartz tube reactor 5 passed from RF-coupled chamber 4, thread supplying machine received by carbon fiber, 10,11 compositions.And quartz tube reactor 5 is for the present invention is specially designed, it is elongated tubular product, pore pipe shin is closed up at two ends, carbon fiber 9 out enters quartz tube reactor 5 from wire drawing wheel, sealing Ar inlet 5C is equipped with inside the pipe shin of two ends, 5D, reacting gas-chlorosilane is provided with and high-purity hydrogen mist adds entrance 5A at filament mouth end reactor, hydrogen chloride bleeding point 5B is provided with at the middle part of quartz tube reactor, this injection gas port 5A is connected on chlorosilane and hydrogen mixing gas distributing chamber 6 by pipeline, passing through flowmeter 6A, 6B respectively with chlorosilane and high-purity hydrogen source of the gas 7, 8 are connected.So just by production engineering specifications, chlorosilane and high-purity hydrogen can be injected compounding chamber 6 by a certain percentage respectively, then inject quartz tube reactor 5 to realize the course of reaction of SiC vapour deposition in this ratio.
Utilize above device and designed technological requirement finally can realize carbon fiber surface and form densification, firmly silicon carbide compound layer, thus substantially increase oxidation-resistance property in carbon fiber application, and improve the composite quality of it and metal, the expansion of carbon fiber range of application and mechanical property are strengthened to playing an important role.
Claims (1)
1. the method for a coating silicon carblde on carbon fiber surface, it is characterized in that: the method by radio frequency focusing formula heater to motion in carbon fiber heating, when it is characterized in that carbon fiber (9) by heating, to the gaseous mixture along carbon fiber sport reverse sourcing chlorosilane and high-purity hydrogen in quartz tube reactor (5), form a reaction environment, realize SiC while making chlorosilane cracking generate hydrogen chloride and be deposited on celion surface formation coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310599601.4A CN104652120A (en) | 2013-11-25 | 2013-11-25 | Technology and device for coating surfaces of carbon fibers with silicon carbide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310599601.4A CN104652120A (en) | 2013-11-25 | 2013-11-25 | Technology and device for coating surfaces of carbon fibers with silicon carbide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104652120A true CN104652120A (en) | 2015-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310599601.4A Pending CN104652120A (en) | 2013-11-25 | 2013-11-25 | Technology and device for coating surfaces of carbon fibers with silicon carbide |
Country Status (1)
| Country | Link |
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| CN (1) | CN104652120A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110079996A (en) * | 2019-05-24 | 2019-08-02 | 中国人民解放军国防科技大学 | Method for repairing surface defects of silicon carbide fibers and silicon carbide fibers repaired by same |
| CN110818438A (en) * | 2019-11-28 | 2020-02-21 | 北京化工大学 | Graphite fiber/silicon carbide composite material laser in-situ forming device and method |
-
2013
- 2013-11-25 CN CN201310599601.4A patent/CN104652120A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110079996A (en) * | 2019-05-24 | 2019-08-02 | 中国人民解放军国防科技大学 | Method for repairing surface defects of silicon carbide fibers and silicon carbide fibers repaired by same |
| CN110079996B (en) * | 2019-05-24 | 2021-08-13 | 中国人民解放军国防科技大学 | Method for repairing surface defects of silicon carbide fibers and silicon carbide fibers repaired by same |
| CN110818438A (en) * | 2019-11-28 | 2020-02-21 | 北京化工大学 | Graphite fiber/silicon carbide composite material laser in-situ forming device and method |
| CN110818438B (en) * | 2019-11-28 | 2023-05-26 | 北京化工大学 | Graphite fiber/silicon carbide composite material laser in-situ forming device and method |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |