CN115028475A - Method for repairing carbon-carbon thermal field product - Google Patents
Method for repairing carbon-carbon thermal field product Download PDFInfo
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- CN115028475A CN115028475A CN202210715483.8A CN202210715483A CN115028475A CN 115028475 A CN115028475 A CN 115028475A CN 202210715483 A CN202210715483 A CN 202210715483A CN 115028475 A CN115028475 A CN 115028475A
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- carbon
- thermal field
- field product
- drying
- coating
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- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000011203 carbon fibre reinforced carbon Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 51
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000001035 drying Methods 0.000 claims abstract description 43
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 36
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 238000000576 coating method Methods 0.000 claims abstract description 31
- 230000007547 defect Effects 0.000 claims abstract description 25
- 238000000227 grinding Methods 0.000 claims abstract description 20
- 238000005229 chemical vapour deposition Methods 0.000 claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 239000003085 diluting agent Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 238000007873 sieving Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 13
- 239000003973 paint Substances 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000005011 phenolic resin Substances 0.000 claims description 5
- 229920001568 phenolic resin Polymers 0.000 claims description 5
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 5
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 4
- 239000007849 furan resin Substances 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 15
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 description 12
- 230000008021 deposition Effects 0.000 description 12
- 239000006185 dispersion Substances 0.000 description 7
- 238000005498 polishing Methods 0.000 description 7
- 244000137852 Petrea volubilis Species 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 238000007605 air drying Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- C09D163/10—Epoxy resins modified by unsaturated compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
- C30B15/10—Crucibles or containers for supporting the melt
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Metallurgy (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a method for repairing a carbon-carbon thermal field product, which comprises the steps of drying carbon slag generated in the mechanical processing process of the carbon-carbon thermal field product, sieving the carbon slag by a 100-mesh sieve, taking undersize products to obtain carbon powder, and stirring and mixing the carbon powder, resin and a diluent to obtain a coating; and coating the coating on the defect position of the carbon-carbon thermal field product, drying, finely grinding, and carrying out chemical vapor deposition to obtain the carbon-carbon thermal field product. According to the invention, the carbon slag generated in the mechanical processing process of the carbon-carbon thermal field product is used as a raw material, the defect part of the carbon-carbon thermal field product is coated, the consistency of the material can be ensured, the cracking phenomenon caused by material mismatch can be avoided, and meanwhile, the carbon slag is repaired by chemical vapor deposition after being coated, so that the compactness of a repair area can be improved, and the bonding force between the repair material and a substrate can be increased. The method can effectively repair the corrosion stripping defect generated in the using process of the carbon-carbon thermal field product, thereby prolonging the service life of the thermal field product.
Description
Technical Field
The invention belongs to the technical field of carbon-carbon composite materials, and particularly relates to a method for repairing a carbon-carbon thermal field product.
Background
Carbon-carbon composite materials (i.e., carbon fiber reinforced carbon composite materials) are novel inorganic non-metal based composite materials, have excellent properties such as high strength, high modulus, high temperature resistance, corrosion resistance, abrasion resistance, thermal shock resistance and the like, and have been widely used in chemical industry, metallurgy, rail transit and aerospace industry. In the photovoltaic industry, with the continuous development of the modern industry towards large size of the requirements of the specification of the thermal field material of the single crystal furnace, the carbon-carbon composite material is used as the main thermal field material for the single crystal silicon drawing furnace by basically replacing graphite at present.
In the crystal pulling process, because of high temperature, a quartz crucible used for containing silicon materials and melted silicon materials are volatilized to generate a large amount of SiO and Si steam, and the gases are easy to generate oxidation reaction and silicification reaction to generate corrosion when contacting carbon-carbon thermal field products (including crucibles, guide cylinders, heat preservation cylinders and the like), so that the surface of the carbon-carbon thermal field products is peeled off. Along with the use, the pores at the peeling parts are enlarged, the density is reduced, and silicon steam gradually reacts with carbon fibers to cause necking, splitting and the like of the carbon fibers, so that the mechanical property is greatly reduced. The above steps are repeated, so that the carbon-carbon thermal field product becomes thinner gradually or cracks appear, and the carbon-carbon thermal field product is damaged and cannot be used.
To solve this problem, the conventional method is to coat the peeled part of the product with graphite emulsion to prolong the service life of the thermal field product. The repairing method is simple to operate and low in cost, but the improving effect is very limited due to the fact that the bonding strength of the repairing method and a matrix is poor and the density is not high.
Disclosure of Invention
The invention provides a simple and reliable method for repairing a carbon-carbon thermal field product, aiming at the problem of corrosion and peeling of the carbon-carbon thermal field product in the using process and the defects of the existing repairing method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a method for repairing a carbon-carbon thermal field product, which comprises the steps of drying carbon slag generated in the mechanical processing process of the carbon-carbon thermal field product, sieving the carbon slag by a 100-mesh sieve, taking undersize products to obtain carbon powder, and stirring and mixing the carbon powder, resin and a diluent to obtain a coating; and coating the paint on the defect position of the carbon-carbon thermal field product, drying, finely grinding and carrying out chemical vapor deposition to obtain the carbon-carbon thermal field product.
According to the repairing method provided by the invention, the carbon slag generated in the mechanical processing process of the carbon-carbon thermal field product is used as a raw material, the defect part of the carbon-carbon thermal field product is coated, the consistency of the material can be ensured, the cracking phenomenon caused by material mismatch is avoided, and meanwhile, the repairing is carried out through chemical vapor deposition after coating, so that the compactness of a repairing area can be improved, and the bonding force between the repairing material and a substrate can be increased.
The repairing method provided by the invention not only can be used for carbon-carbon thermal field products which are peeled off when being applied to a thermal field, but also can be used for carbon-carbon thermal field products which generate defects in the production process.
According to the preferable scheme, carbon slag generated in the mechanical processing process of the carbon-carbon thermal field product is dried for 5-8 hours at the temperature of 80-150 ℃, and is filtered through a 100-mesh standard sieve after being cooled, and undersize products are taken to obtain carbon powder.
Preferably, the resin is at least one selected from phenolic resin, furan resin and epoxy resin.
In the preferable scheme, in the coating, the mass ratio of carbon powder to resin is 5-7: 3 to 5.
In the invention, the mass ratio of the carbon powder to the resin needs to be effectively controlled, and if the mass ratio of the carbon powder to the resin is too large, the viscosity of the coating is too high, which is not beneficial to coating defects of products. Conversely, too low a viscosity is not favorable for coating.
Preferably, the diluent is industrial alcohol, and the diluent is added to enable the viscosity of the coating to be 1000-5000 mPa.s.
In the preferable scheme, the rotating speed of stirring and mixing is 1000-3000 r/min; the stirring and mixing time is 15-40 min.
The inventor finds that the stirring speed and time need to be effectively controlled, and if the stirring speed is too high and the stirring time is too long, the temperature of the coating can be increased, so that the viscosity of the coating is increased, and the coating is not favorable for coating. On the contrary, the coating is not uniformly dispersed, which is not favorable for coating.
Preferably, when the defect of the carbon-carbon thermal field product is a loose part, a coarse grinding sand paper or a grinding wheel is used for grinding to remove the peeling and loose part, and if the defect of the carbon-carbon thermal field product is a pit, a file is used for grinding.
According to the preferable scheme, the coating is coated on the defect position of the carbon-carbon thermal field product, the defect position is scraped by a scraper, then the coating is naturally dried for 3-5 hours, and then the coating is transferred to a drying box for drying, wherein the drying is carried out for 2-4 hours at the temperature of 80-100 ℃ and then for 3-5 hours at the temperature of 150-200 ℃.
The inventors have found that by using the drying process of the present invention, a repair area with good bonding properties, which is flat and smooth and free of cracks, can be obtained, while if the drying process of the present invention is not used, even if the temperature is increased too fast, the repair area may crack.
In the actual operation process, the repairing area is ground by sand paper in time after the drying is finished.
In a preferred embodiment, in the chemical vapor deposition, the carbon source gas used is at least one selected from methane, propylene and natural gas; the diluent gas is selected from H 2 、Ar、N 2 At least one of the carbon source gas and the diluent gas, wherein the flow ratio of the carbon source gas to the diluent gas is 50-115: 10 to 20.
In the preferable scheme, the temperature of the chemical vapor deposition is 900-1200 ℃, the time of the chemical vapor deposition is 10-80 h, and the pressure of the chemical vapor deposition is 0.1-10 kPa.
The carbon-carbon thermal field product repaired by the method can effectively prolong the service life.
Has the advantages that:
1. the carbon slag after the carbon-carbon thermal field product is machined and cut is used as a repairing raw material, so that the consistency of the material is ensured, the cracking phenomenon caused by material mismatch is avoided, the resource is recycled, and good social and economic benefits are brought;
2. by the process method combining brushing and chemical vapor deposition, the compactness of a repair area can be improved, and the bonding force between the repair material and a matrix can be increased, so that the repair effect of the product is effectively ensured.
Detailed Description
Example 1
Drying carbon slag generated in the carbon mechanical processing process of a carbon-carbon thermal field product at 150 ℃ for 5 hours, and passing through a standard sieve of 100 meshes after cooling; sequentially adding phenolic resin E027 and carbon powder into a stirring dispersion machine according to the mass ratio of 5:5, wherein the rotating speed of the dispersion machine is 3000r/min, the stirring time is 15min, and a proper amount of industrial alcohol is added into the dispersion machine according to the change of the viscosity of the coating to adjust the viscosity to be 5000 mPa.s; polishing the carbon-carbon thermal field product with the surface having corrosion peeling defects by using 200-mesh coarse grinding abrasive paper to remove peeling and loose parts, and polishing the pits by using a file; smearing the prepared coating on the polished area, and leveling by using a scraper; naturally drying for 3 hours, and then transferring the repaired product to an air drying oven for drying at the drying temperature of 100 ℃ for 2 hours and at the drying temperature of 200 ℃ for 3 hours; after drying, accurately grinding the repaired area by 600-mesh sand paper in time; placing the finely ground product into a chemical vapor deposition furnace, and mixing the materials according to a volume ratio of 50: 10: 10 introduction of propylene and H 2 And Ar, wherein the deposition temperature is 900 ℃, the deposition pressure is 5kPa, and the deposition time is 80 h.
Example 2
Drying carbon slag generated in the carbon mechanical processing process of the carbon-carbon thermal field product at 80 ℃ for 8 hours, and passing through a standard sieve of 100 meshes after cooling; sequentially adding phenolic resin E027, furan resin and carbon powder into a stirring disperser according to the mass ratio of 3:3:4, wherein the rotating speed of the disperser is 2500r/min, the stirring time is 30min, and a proper amount of industrial alcohol is added into the dispersing machine according to the change of the viscosity of the coating to adjust the viscosity to 3500 mPa.s; grinding carbon with corrosion stripping defect on surface by using grinding wheelPolishing the carbon thermal field product to remove the peeling and loosening parts, and polishing the pits by adopting a file; smearing the prepared paint on the polished area, and scraping the paint by using a scraper; naturally drying for 4 hours, and then transferring the repaired product to a forced air drying oven for drying at the drying temperature of 90 ℃ for 3 hours and at the drying temperature of 180 ℃ for 4 hours; after drying, accurately grinding the repaired area by 600-mesh sand paper in time; putting the finely ground product into a chemical vapor deposition furnace, and mixing the materials according to a volume ratio of 100: 15: 6: 6 introducing natural gas, propylene and H 2 And N 2 The deposition temperature is 1000 ℃, the deposition pressure is 2kPa, and the deposition time is 60 h.
Example 3
Drying carbon slag generated in the carbon mechanical processing process of a carbon-carbon thermal field product at 105 ℃ for 6 hours, and passing the carbon slag through a 100-mesh standard sieve after cooling; sequentially adding phenolic resin E026 and carbon powder into a stirring dispersion machine according to the mass ratio of 7:3, wherein the rotating speed of the dispersion machine is 1000r/min, the stirring time is 40min, and a proper amount of industrial alcohol is added into the dispersion machine according to the change of the viscosity of the coating to adjust the viscosity to 1000 mPa.s; polishing the carbon-carbon thermal field product with the surface having corrosion peeling defects by using 200-mesh coarse grinding abrasive paper to remove peeling and loose parts, and polishing the pits by using a file; smearing the prepared paint on the polished area, and scraping the paint by using a scraper; naturally drying for 5 hours, and then transferring the repaired product to an air drying oven for drying at the drying temperature of 80 ℃ for 4 hours and at the drying temperature of 150 ℃ for 5 hours; after drying, accurately grinding the repaired area by using 800-mesh sand paper in time; placing the finely ground product into a chemical vapor deposition furnace, and mixing the materials according to a volume ratio of 60: 10: 10 introduction of propylene and N 2 And Ar, wherein the deposition temperature is 900 ℃, the deposition pressure is 0.1kPa, and the deposition time is 80 h.
Example 4
Drying carbon slag generated in the carbon mechanical processing process of a carbon-carbon thermal field product at 105 ℃ for 6 hours, and passing through a 100-mesh standard sieve after cooling; adding epoxy vinyl resin and carbon powder in a stirring disperser in a mass ratio of 6:4 in sequence, wherein the rotating speed of the disperser is 2500r/min, the stirring time is 20min, and the dispersing process is carried out according to the viscosity of the coatingChanging, adding a proper amount of industrial alcohol to adjust the viscosity to 2000 mPa.s; polishing the carbon-carbon thermal field product with the surface having corrosion stripping defects by using a grinding wheel to remove stripping and loose parts, and polishing the pits by using a file; smearing the prepared paint on the polished area, and scraping the paint by using a scraper; naturally drying for 5 hours, and then transferring the repaired product to an air drying oven for drying at the drying temperature of 100 ℃ for 3 hours and at the drying temperature of 200 ℃ for 4 hours; after drying, accurately grinding the repaired area by using 800-mesh sand paper in time; placing the finely ground product into a chemical vapor deposition furnace, and mixing the raw materials in a volume ratio of 95: 8: 8 introducing methane and N 2 And Ar, wherein the deposition temperature is 1200 ℃, the deposition pressure is 10kPa, and the deposition time is 10 h.
The unrepaired carbon products are cracked and cannot be used after being used for about 6 months, but the repaired carbon products subjected to the schemes of the embodiments 1, 2, 3 and 4 have the repairing areas which are not peeled off or cracked for more than 6 months, and the final service life of the repaired carbon products reaches more than 9 months.
Comparative example 1
The other conditions are the same as example 1, except that the raw material is not carbon slag generated in the carbon mechanical processing process of the carbon thermal field product, but conventional graphite powder. After the carbon-carbon product repaired by the scheme is used for 13 days, the repairing area begins to be peeled or cracked, and the service life is not prolonged obviously.
Comparative example 2
The other conditions were the same as in example 2 except that the mass ratio of resin to carbon powder was 8: 2. After the carbon-carbon product repaired by the scheme is used for 8 days, the repairing area begins to be peeled or cracked, and the service life is not prolonged obviously.
Comparative example 3
The other conditions were the same as in example 3 except that the dispersion time was 5min when preparing the coating material. After the carbon-carbon product repaired by the scheme is used for 3 days, the repairing area begins to be peeled off or cracked, and the service life is not prolonged obviously.
Comparative example 4
The other conditions were the same as in example 4 except that the drying process was not carried out stepwise and the temperature was directly raised to 300 ℃. After the carbon-carbon product repaired by the scheme is used for 5 days, the repairing area begins to be peeled or cracked, and the service life is not prolonged obviously.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly and indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (10)
1. A method for repairing a carbon-carbon thermal field product is characterized by comprising the following steps: drying carbon slag generated in the mechanical processing process of the carbon-carbon thermal field product, sieving the carbon slag with a 100-mesh sieve, taking undersize products to obtain carbon powder, and stirring and mixing the carbon powder, resin and a diluent to obtain a coating; and coating the coating on the defect position of the carbon-carbon thermal field product, drying, finely grinding, and carrying out chemical vapor deposition to obtain the carbon-carbon thermal field product.
2. The method of claim 1, wherein the method comprises the steps of: and (3) drying carbon slag generated in the mechanical processing process of the carbon-carbon thermal field product at 80-150 ℃ for 5-8 h, cooling, sieving by a 100-mesh standard sieve, and taking undersize products to obtain carbon powder.
3. The method of claim 1, wherein the method comprises the steps of: the resin is selected from at least one of phenolic resin, furan resin and epoxy resin.
4. The method of claim 1, wherein the method comprises the steps of: in the coating, the mass ratio of carbon powder to resin is 5-7: 3 to 5.
5. The method of claim 1, wherein the method comprises the steps of: the diluent is industrial alcohol, and the viscosity of the coating is 1000-5000 mPa.s by adding the diluent.
6. The method of claim 1, wherein the method comprises the steps of: the rotating speed of stirring and mixing is 1000-3000 r/min; the stirring and mixing time is 15-40 min.
7. The method of claim 1, wherein the method comprises the steps of: when the defect position of the carbon-carbon thermal field product is a loose part, firstly, grinding by using coarse grinding abrasive paper or a grinding wheel to remove the peeling and loose part, and if the defect position of the carbon-carbon thermal field product is a pit, grinding by using a file.
8. The method of claim 1 or 7, wherein the method comprises the steps of: coating the paint on the defect position of a carbon-carbon thermal field product, scraping the defect position by using a scraper, naturally drying the defect position for 3-5 hours, transferring the defect position to a drying box for drying, drying the defect position for 2-4 hours at 80-100 ℃, and drying the defect position for 3-5 hours at 150-200 ℃.
9. The method of claim 1, wherein the method comprises the steps of: in the chemical vapor deposition, the carbon source gas is selected from at least one of methane, propylene and natural gas; the diluent gas is selected from H 2 、Ar、N 2 At least one of the carbon source gas and the diluent gas, wherein the flow ratio of the carbon source gas to the diluent gas is 50-115: 10 to 20.
10. The method for repairing a carbon-carbon thermal field product according to claim 1, wherein: the temperature of the chemical vapor deposition is 900-1200 ℃, the time of the chemical vapor deposition is 10-80 h, and the pressure of the chemical vapor deposition is 0.1-10 kPa.
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| CN117886630A (en) * | 2024-03-14 | 2024-04-16 | 浙江星辉新材料科技有限公司 | Carbon-carbon repair material composition, carbon-carbon repair material and carbon-carbon repair material repair method |
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