CN111349378A - Long-life high-temperature sealing coating material and preparation method thereof - Google Patents
Long-life high-temperature sealing coating material and preparation method thereof Download PDFInfo
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- 239000011248 coating agent Substances 0.000 title claims abstract description 80
- 239000000463 material Substances 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 37
- 150000002148 esters Chemical class 0.000 claims abstract description 19
- 229920006389 polyphenyl polymer Polymers 0.000 claims abstract description 19
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 8
- 239000011261 inert gas Substances 0.000 claims description 13
- 238000000889 atomisation Methods 0.000 claims description 11
- 238000009689 gas atomisation Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 4
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 4
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 4
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 4
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 4
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 238000005054 agglomeration Methods 0.000 claims description 2
- 230000002776 aggregation Effects 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000001694 spray drying Methods 0.000 claims description 2
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- 238000007254 oxidation reaction Methods 0.000 abstract description 24
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- 239000011651 chromium Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 7
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- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
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- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000943 NiAl Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
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- 229910052727 yttrium Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910003266 NiCo Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 238000011946 reduction process Methods 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
A long-life high-temperature sealing coating material and a preparation method thereof belong to the technical field of aero-engines and gas turbines. The long-life high-temperature sealing coating material is compounded by NiCoCrAlY powder, polyphenyl ester and a binder, and comprises the following three components in percentage by weight: 6-15 of polyphenyl ester; 0-7 parts of a binder; NiCoCrAlY powder and the balance; wherein the NiCoCrAlY powder comprises the following chemical components in percentage by weight: 21-23 parts of Co; 24-26 parts of Cr; 6-8 parts of Al; y, 0-1; ni, the balance. The porous MCrAlY coating prepared from the long-life high-temperature sealing coating material provided by the invention does not fall off after being circularly oxidized for 1700 hours at 1000 ℃, while the coating prepared by the conventional method falls off after being circularly oxidized for about 500 hours under the same test condition, and the oxidation resistance life of the porous MCrAlY coating obtained by the invention is obviously prolonged.
Description
Technical Field
The invention belongs to the technical field of aero-engines and gas turbines, and relates to an abradable seal coating material for controlling the gas path clearance of an aero-engine gas compressor and a preparation method thereof.
Background
In order to improve efficiency, reduce oil consumption and the like, modern aeroengines and gas turbines use a large number of sealing coatings on gas compressors and turbine parts. At present, two types of sealing coatings applied to the high-pressure turbine part of an aeroengine are mainly provided, one type is a metal-based coating, the other type is a ceramic-based coating, the metal-based coating has better thermal expansion matching property with a nickel-based alloy turbine outer ring, the metal-based coating is applied more at present, but the application temperature of the metal-based coating is limited due to the poor oxidation resistance of the coating.
The porous MCrAlY (M can be Ni, Co or NiCo) metal-based sealing coating is a metal-based high-temperature sealing coating which is applied more at present, and the porous MCrAlY coating with the porosity of 20-40 percent is obtained by taking MCrAlY alloy as a framework component and carrying out polyphenyl ester pore-forming. The most common skeleton component is Ni-25Cr-5Al-0.5Y, and the coating taking MCrAlY as the skeleton component has better oxidation resistance at 750 ℃ and below, but has insufficient oxidation resistance at higher temperature, particularly the coating falls off after being circularly oxidized for 500 hours at 1000 ℃, and cannot meet the requirement of 1500-hour coating service life of a large turbofan engine.
Disclosure of Invention
The invention aims to provide a long-life high-temperature sealing coating material and a preparation method thereof, and the porous MCrAlY coating prepared from the powder material does not fall off after being subjected to cyclic oxidation at 1000 ℃ for 1700h, so that the service life is obviously prolonged. The purpose of the invention is realized by the following technical scheme.
A long-life high-temperature sealing coating material is compounded by NiCoCrAlY powder, polyphenyl ester and a binder, and the coating material comprises the following three components in percentage by weight: 6-15 of polyphenyl ester; 0-7 parts of a binder; NiCoCrAlY powder and the balance; wherein the NiCoCrAlY powder comprises the following chemical components in percentage by weight: 21-23 parts of Co; 24-26 parts of Cr; 6-8 parts of Al; y, 0-1; ni, the balance. The chemical components of NiCoCrAlY powder are key points, and the NiCoCrAlY of the chemical components has the characteristic that the thermal expansion coefficient does not generate mutation along with the rise and the fall of the temperature, so that the adhesion of a thermal growth oxide film on the surface of a skeleton of a porous NiCoCrAlY coating under the working condition of cold and hot circulation can be obviously improved, and the service life of the coating is obviously prolonged.
In order to obtain better technical effect, the impurity content in NiCoCrAlY powder can be controlled: o, less than or equal to 600 ppm; c, less than or equal to 300 ppm; n is less than or equal to 200 ppm.
Further, the NiCoCrAlY powder is prepared by adopting an atomization process, including but not limited to inert gas atomization in a vacuum environment and inert gas atomization in an inert gas protection environment.
Further, the binder is selected from: one or more of polyvinylpyrrolidone, polyvinyl alcohol, epoxy resin, acrylate, sodium carboxymethylcellulose and sodium metasilicate.
According to the preparation method of the long-life high-temperature sealing coating material, NiCoCrAlY powder is prepared according to the chemical components, three components of NiCoCrAlY powder, polyphenyl ester and a binder are prepared according to the proportion, and then the three components are compounded by adopting one or a combination of several powder compounding processes of agglomeration compounding, spray drying, mechanical coating and the like, so that the long-life high-temperature sealing coating material is obtained.
Further, the NiCoCrAlY powder is prepared by adopting an atomization process, including but not limited to inert gas atomization in a vacuum environment and inert gas atomization in an inert gas protection environment.
Further, the binder is selected from: one or more of polyvinylpyrrolidone, polyvinyl alcohol, epoxy resin, acrylate, sodium carboxymethylcellulose and sodium metasilicate.
The Oxidation resistance of the MCrAlY coating results from a protective oxide film, or so-called Thermally Grown Oxide (TGO), formed on its surface, the main component of which is alumina. The stronger the adhesion and the slower the growth rate of the TGO film layer, the better the oxidation resistance of the coating. Typical approaches to improve the oxidation resistance of MCrAlY coatings include: (1) adding microelements such as Hf, Si and Y to improve the interface quality of TGO and the alloy matrix; (2) the compactness of the coating is improved, and oxygen diffusion channels are reduced; (3) addition of Ta, Re, and other elements lowers the diffusion rate of Al. Through a large amount of research work, the technical personnel of the invention find that for the porous MCrAlY sealing coating, the MCrAlY skeleton components are improved by adopting the three methods, and the satisfactory cyclic oxidation resistance of the coating can not be obtained all the time.
After the inventors' diligent efforts, it was found that TGO of conventional dense MCrAlY coatings generally grows only on the coating surface, while TGO of porous MCrAlY coatings grows not only on the coating surface but also on the inner surface of the pores inside the coating in large quantities.A main component of TGO is alumina, which has a thermal expansion coefficient of about 7 × 10-6/° C, whereas the coefficient of thermal expansion of the MCrAlY alloy is about 13 × 10-6The thermal expansion coefficient difference between the two is large, TGO is easy to fall off due to volume stress generated under the working condition of cold and hot circulation, and the oxidation resistance of the coating is reduced. For conventional dense MCrAlY coatings, the surface is smoother and TGO grows on open surfaces, so the difference in expansion coefficients only leads to TGO spallation when the TGO thickness is large (about 3-5 μm). The TGO in the porous MCrAlY coating grows not only on the surface of the coating but also on the surface of the internal pores in a large amount, and the growing surface is a curved surface with large curvature and a closed surface, so the TG in the porous MCrAlY coatingO is more susceptible to exfoliation due to the difference in thermal expansion coefficients. Schematic representation of the growth state of the dense MCrAlY and porous MCrAlY coatings TGO is shown in fig. 1a and 1 b.
After the diligent efforts of the inventor, the thermal expansion coefficient of Ni-25Cr-5Al-0.5Y is found to have a remarkable abrupt change at 800-900 ℃, and the thermal expansion coefficient is characterized by nonlinear change along with the temperature rise and fall, compared with a coating with the thermal expansion coefficient linearly changing along with the temperature rise and fall, the volume stress between TGO and MCrAlY is increased, the stress state is complicated, and the TGO is easier to fall off under the cold and hot circulation conditions. Therefore, the technical personnel of the invention think that the MCrAlY framework material with the thermal expansion coefficient changing linearly along with the temperature change can be obtained by optimizing the MCrAlY alloy composition, and the cyclic oxidation resistance of the coating can be improved.
After the diligent efforts of the inventor, the inventors found that the reason for causing the thermal expansion coefficient of Ni-25Cr-5Al-0.5Y to change suddenly with the temperature is that the tissue is transformed from α -Cr phase to β -NiAl phase when the temperature is increased from low temperature to 800-900 ℃, and the tissue is recovered from the temperature reduction process, the expansion coefficient of α -Cr phase is about 8.1 × 10-6/° C, and the coefficient of expansion of the β -NiAl phase is about 12 × 10-6The Ni-25Cr-5Al-0.5Y thermal expansion coefficient abruptly increases and decreases as the phase transformation proceeds, and thus, it is thought by those skilled in the art that the phase transformation can be eliminated by eliminating α -Cr phase through composition optimization, thereby obtaining an MCrAlY skeleton component having a linear thermal expansion coefficient.
The inventor continuously tries to optimize a NiCoCrAlY component, and Co is introduced into a NiCrAlY component system to inhibit the generation of α -Cr phase, but the reduction of the Cr content can influence the oxidation resistance and the hot corrosion resistance of the coating, so the Al content is properly increased as supplement, and through the continuous effort of the technicians of the invention, by means of simulation calculation and a large amount of experimental research, the coating with linear thermal expansion coefficient and better oxidation resistance and corrosion resistance balance is obtained, wherein the chemical components comprise, by weight, Co 21-23, Cr 24-26, Al 6-8, Y0-1, Ni and the balance, and the thermal expansion coefficient of the coating and Ni-25Cr-5Al-0.5Y is changed along with the temperature, and the curve of the thermal expansion coefficient of the coating and the thermal expansion coefficient of Ni-25Cr-5Al-0.5Y along with the temperature is shown in figure 2.
Through a large number of experiments, the inventor finds that the porous MCrAlY sealing coating with excellent cyclic oxidation resistance can be prepared by the spraying material obtained by compounding the NiCoCrAlY framework component powder and the polyphenyl ester powder according to a specific proportion. The specific mixture ratio is that the weight percentages of three components are as follows: 6-15 of polyphenyl ester; 0-7 parts of a binder; NiCoCrAlY, balance. If the content of the polyphenyl ester in the composite powder is lower than 6 percent, the content of the polyphenyl ester (which becomes holes after being burnt out) in the prepared coating is insufficient, and the coating hardness is too high (more than 80 HR45Y) to be used as a sealing coating; the content of the polyphenyl ester in the composite powder is higher than 15 percent, the content of the polyphenyl ester in the prepared coating is too high, the NiCoCrAlY component in the coating structure is in discontinuous state distribution, the polyphenyl ester is in continuous state distribution, and the coating is pulverized and fails after the polyphenyl ester is decomposed at high temperature (about 1000 ℃) under the service working condition. The spraying material contains a certain amount of binder to improve the uniformity of the material components, but if the content is higher than 7%, the residue of the binder in the coating is higher than 4%, which causes adverse effects such as obviously reducing the bonding strength and hardness of the coating.
The porous MCrAlY coating prepared from the long-life high-temperature sealing coating material provided by the invention does not fall off after being circularly oxidized for 1700 hours at 1000 ℃, while the coating prepared by the conventional method falls off after being circularly oxidized for about 500 hours under the same test condition, and the oxidation resistance life of the porous MCrAlY coating obtained by the invention is obviously prolonged. The cyclic oxidation test conditions are as follows: and placing the porous MCrAlY coating sample coated on the nickel-based superalloy substrate in an air resistance furnace at the temperature of 1000 ℃ and preserving heat for 50min, then quickly taking out the sample and cooling the sample in the air at room temperature for 10min, namely a 1-hour cyclic oxidation test, and repeating the test until the coating is peeled off or other coatings are obviously damaged.
Drawings
FIG. 1a is a schematic representation of a dense MCrAlY coating TGO.
FIG. 1b is a schematic representation of porous MCrAlY coating TGO.
FIG. 2 is a graph of the coefficient of thermal expansion versus temperature for NiCoCrAlY and conventional NiCrAlY coatings of the present invention.
FIG. 3a is the TGO morphology after cyclic oxidation of a NiCoCrAlY coating.
FIG. 3b is a TGO morphology after cyclic oxidation of a conventional NiCrAlY coating.
FIG. 4 is a photograph showing the morphology of NiCoCrAlY/polyphenyl ester composite powder according to the present invention.
Detailed Description
The present invention is further explained below.
A long-life high-temperature sealing coating framework material and a preparation method thereof comprise the following implementation steps:
step 1: 13.5kg of nickel plate, 7kg of cobalt plate, 7.8kg of chromium block, 2.8kg of aluminum block and 0.5kg of yttrium block were measured.
Step 2: inert gas atomization powder preparation is carried out on a Germany ALD large-scale vacuum atomization system, the raw materials in the step 1 are added into a vacuum melting furnace of the atomization system, medium-frequency induction heating is utilized, the melting power is 55kW, after the alloy liquid is homogenized, argon is utilized for atomization, and the atomization parameters are as follows: the temperature is 1650 ℃, the atomization pressure is 4MPa, the atomization angle is 60 degrees, and the diameter of the nozzle is 4mm, thus obtaining NiCoCrAlY alloy powder.
And step 3: and (3) screening the NiCoCrAlY powder obtained in the step (2) by using a 140-mesh screen meeting the GB T5330-2003 standard, and taking undersize for later use.
And 4, step 4: weighing 8.8kg of NiCoCrAlY powder obtained in the step 3 and 1.0kg of CGZ-400 polyphenyl ester powder produced by Zhonghao Chen photochemical research institute Co.
And 5: 0.2kg of polyvinyl alcohol is measured, 5L of deionized water is added, heated to 80 ℃ and fully dissolved, and the mixture is placed to room temperature to obtain the binder.
Step 6: and (4) pouring the binder obtained in the step (5) into the powder mixture obtained in the step (4), fully and uniformly stirring, and continuing stirring until the powder is granulated.
And 7: and (3) screening the powder obtained in the step (6) by using a 60-mesh screen and a 400-mesh screen which meet the GB T5330-2003 standard, wherein the obtained-60-400-mesh powder is the long-life high-temperature sealing material, and the appearance of the material is shown in FIG. 4.
The porous MCrAlY coating prepared by the long-life high-temperature sealing material does not fall off after cyclic oxidation at 1000 ℃ for 1700h, and the appearance of TGO after cyclic oxidation of the coating is shown in figure 3 a; and the coating prepared by the conventional method is peeled off after cyclic oxidation for about 500h under the same test condition, and the TGO appearance of the coating after cyclic oxidation is shown in figure 3 b. The oxidation resistance life of the porous MCrAlY coating prepared by the long-life high-temperature sealing material is obviously prolonged.
Claims (7)
1. The long-life high-temperature sealing coating material is characterized by being compounded by NiCoCrAlY powder, polyphenyl ester and a binder, wherein the coating material comprises the following three components in percentage by weight: 6-15 of polyphenyl ester; 0-7 parts of a binder; NiCoCrAlY powder and the balance; wherein the NiCoCrAlY powder comprises the following chemical components in percentage by weight: 21-23 parts of Co; 24-26 parts of Cr; 6-8 parts of Al; y, 0-1; ni, the balance.
2. The long life high temperature seal coating material of claim 1, wherein the NiCoCrAlY powder has an impurity content of: o, less than or equal to 600 ppm; c, less than or equal to 300 ppm; n is less than or equal to 200 ppm.
3. The long life high temperature seal coating material of claim 1, wherein said NiCoCrAlY powder is prepared using an atomization process comprising inert gas atomization in a vacuum environment, inert gas atomization in an inert gas protected environment.
4. The long life, high temperature seal coating material of claim 1, wherein said binder is selected from the group consisting of: one or more of polyvinylpyrrolidone, polyvinyl alcohol, epoxy resin, acrylate, sodium carboxymethylcellulose and sodium metasilicate.
5. A preparation method of a long-life high-temperature sealing coating material is characterized in that NiCoCrAlY powder is prepared according to the chemical components in claim 1 or 2, three components of the NiCoCrAlY powder, polyphenyl ester and a binder are prepared according to the proportion in claim 1, and then the three components are compounded by adopting one or more of powder compounding processes of agglomeration compounding, spray drying, mechanical coating and the like to obtain the long-life high-temperature sealing coating material.
6. The preparation method of claim 5, wherein the NiCoCrAlY powder is prepared by an atomization process, and the atomization process comprises inert gas atomization in a vacuum environment and inert gas atomization in an inert gas protection environment.
7. The method of claim 5, wherein the binder is selected from the group consisting of: one or more of polyvinylpyrrolidone, polyvinyl alcohol, epoxy resin, acrylate, sodium carboxymethylcellulose and sodium metasilicate.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6410159B1 (en) * | 1999-10-29 | 2002-06-25 | Praxair S. T. Technology, Inc. | Self-bonding MCrAly powder |
| US20030054196A1 (en) * | 2001-05-24 | 2003-03-20 | Yuk-Chiu Lau | High temperature abradable coating for turbine shrouds without bucket tipping |
| CN1621557A (en) * | 2004-12-28 | 2005-06-01 | 北京航空航天大学 | Thermal barrier coating suitable for nickel-based high-temperature alloy with high Mo content |
| CN1844445A (en) * | 2006-05-11 | 2006-10-11 | 北京航空航天大学 | Thermal Barrier Coating Method for Porous Dendritic Ceramic Layers by Electron Beam Physical Vapor Deposition |
| CN102888538A (en) * | 2012-10-12 | 2013-01-23 | 华北电力大学 | Protective coating material for power plant steel and preparation method thereof |
| CN110527940A (en) * | 2019-10-16 | 2019-12-03 | 北京矿冶科技集团有限公司 | Porous MCrAlY abradable coating of high bond strength resistance to high temperature oxidation and preparation method thereof |
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- 2020-05-06 CN CN202010370907.2A patent/CN111349378A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6410159B1 (en) * | 1999-10-29 | 2002-06-25 | Praxair S. T. Technology, Inc. | Self-bonding MCrAly powder |
| US20030054196A1 (en) * | 2001-05-24 | 2003-03-20 | Yuk-Chiu Lau | High temperature abradable coating for turbine shrouds without bucket tipping |
| CN1621557A (en) * | 2004-12-28 | 2005-06-01 | 北京航空航天大学 | Thermal barrier coating suitable for nickel-based high-temperature alloy with high Mo content |
| CN1844445A (en) * | 2006-05-11 | 2006-10-11 | 北京航空航天大学 | Thermal Barrier Coating Method for Porous Dendritic Ceramic Layers by Electron Beam Physical Vapor Deposition |
| CN102888538A (en) * | 2012-10-12 | 2013-01-23 | 华北电力大学 | Protective coating material for power plant steel and preparation method thereof |
| CN110527940A (en) * | 2019-10-16 | 2019-12-03 | 北京矿冶科技集团有限公司 | Porous MCrAlY abradable coating of high bond strength resistance to high temperature oxidation and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| KANG YUAN ET AL.: "A study on the thermal cyclic behavior of thermal barrier coatings with different MCrAlY roughness", 《VACUUM》 * |
| 刘建明 等: "可磨耗相尺寸对脆性断裂机制封严涂层可磨耗性的影响研究", 《热喷涂技术》 * |
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