CN213507160U - Thermal barrier coating device - Google Patents
Thermal barrier coating device Download PDFInfo
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- CN213507160U CN213507160U CN202022277950.2U CN202022277950U CN213507160U CN 213507160 U CN213507160 U CN 213507160U CN 202022277950 U CN202022277950 U CN 202022277950U CN 213507160 U CN213507160 U CN 213507160U
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Abstract
The utility model discloses a thermal barrier coating device, including plasma spray gun, sample platform, powder feeder, vacuum pump, power, filtration dust pelletizing system, central controller, cooling system, vacuum studio. The plasma spray gun is welded on the sample table, the plasma spray gun and the sample table are located inside the vacuum working chamber, the vacuum pump is arranged on the left side of the powder feeder, the powder feeder is installed on the left side of the filtering and dust removing system, the vacuum working chamber is arranged on the left side of the cooling system, the vacuum working chamber is connected with the power supply, and the vacuum working chamber is arranged above the central controller. The device has the advantages of both plasma spraying and electron beam physical vapor deposition technologies, can gasify the spraying material under ultra-vacuum to realize non-line-of-sight deposition, and can prepare various coating structures of flaky, columnar crystals, and the combination of flaky and columnar crystals, so that the uniform deposition of the thermal barrier coating structure and the structure of a workpiece is realized.
Description
Technical Field
The utility model discloses a thermal barrier coating device relates to metal processing technology field.
Background
Thermal and environmental barrier coatings are necessary coatings to protect metal and ceramic components in the high temperature environment of a turbine engine. To meet the increasing temperature requirements, the composition and structure of these coatings are becoming more and more complex. Thermal spray technology is currently a long-term process for depositing thermal barrier coatings and electron beam coatings. In a conventional atmospheric plasma spray process, the coating is formed by the build-up of molten ceramic material as the spray gun passes through the substrate. In this process, the resulting coating has a microstructure that is well suited for turbine airfoil components.
The current coating is mainly prepared by means of atmospheric plasma spraying, plasma enhanced chemical vapor deposition, electron beam physical vapor deposition, electrostatic spraying assisted vapor deposition and the like.
The coating prepared by atmospheric plasma spraying is loose, has a lamellar structure, low surface roughness, poor thermal shock resistance and easy oxidation.
The coating prepared by plasma enhanced chemical vapor deposition and electron beam physical vapor deposition has a compact structure, a columnar crystal structure and better oxidation resistance and corrosion resistance, but the electron beam physical vapor deposition has high manufacturing cost, high coating thermal conductivity and difficult control of coating material components, and has the defects of so-called shadow effect, low utilization rate of raw materials and the like.
Electrostatic spray assisted vapor deposition is a method for producing ceramic coatings on heated substrate superalloys by spraying the powder under an electric field, which can effectively protect gas turbine rotors or blades and have a long service life. However, after the coating is deposited, a heat treatment process is required to eliminate the stress and the carbon content on the surface of the coating, so that the preparation process is complicated and takes much time.
Compare with above-mentioned traditional atmosphere plasma spraying, the utility model discloses a thermal barrier coating device, it is based on plasma spraying-physical vapor deposition technique, and the protective coating who prepares is difficult for the oxidation, moreover the utility model discloses power is big, and spraying material easily melts, gasifies, and injection speed is fast, can realize column coating structure or layer post composite coating structure, improves the performance of coating. The utility model has the biggest advantage that the coating structure can be flexibly changed according to the processing conditions. Thin dense coatings can be deposited with the same chamber with a planar-like microstructure and a columnar coating similar to physical vapor deposition. The variety of microstructures and rapid deposition rates make this technique extremely attractive for a wide range of applications in wear resistant or resistive coatings, diffusion barriers, ion transport layers for fuel cell components or gas sensing membranes, including due to the significant difference between plasma spray deposition and conventional plasma spray deposition.
The utility model discloses above problem can be overcome to the thermal barrier coating device to compensate the difference between traditional atmospheric plasma spraying and the physical vapor deposition technique, thereby create unique microstructure. The ceramic coating is prepared on the metal substrate by using a plasma spraying-physical vapor deposition method, and the good mechanical property of the metal material is combined with the high-temperature resistance, wear resistance and corrosion resistance of the ceramic material, so that the mechanical property and the environmental property of the material during working are met, and the material completely meeting the working requirement is obtained.
The utility model discloses a also can further reduce dynamic pressure, make spraying flame flow more even with speed, make it possess more extensive application in relevant fields such as semiconductor, superconductive coating, fuel cell and solar cell's preparation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defect that exists among the above-mentioned prior art, provide a thermal barrier coating device. In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the utility model relates to a thermal barrier coating device mainly comprises parts such as plasma spray gun, vacuum studio, vacuum pump, powder feeder, central controller.
In the structure, the spraying process is controlled by the central controller, the plasma spray gun, the workpiece and the sample stage are all positioned in an ultra-low pressure vacuum closed chamber, the vacuum chamber is connected with a vacuum pump and a filtering and dedusting system, and a certain vacuum degree can be kept during spraying.
As a further proposal, the utility model discloses a working environment and the high power high enthalpy value of ultralow pressure plasma spray gun, plasma gas flow can reach 220 standard liters per minute, and spraying power can reach about 110 kilowatts, and plasma jet form and characteristic all can take place very big change this moment. Plasma gas is heated and dissociated into high-energy and high-pressure plasma in the vacuum working chamber by electric arcs, and the high-energy and high-pressure plasma enters the vacuum working chamber through the plasma torch and then expands rapidly to form supersonic plasma jet.
As a further aspect of the present invention, the utility model discloses generally adopt the mode of sending powder in the rifle, the spraying powder is directly injected into among the plasma jet in the spray gun, be favorable to the heating of powder to melt like this.
Drawings
Fig. 1 is a schematic view of the overall structure of a thermal barrier coating apparatus according to the present invention.
Reference numerals: the device comprises a plasma spray gun 1, a sample table 2, a powder feeder 3, a vacuum pump 4, a power supply 5, a filtering and dedusting system 6, a central controller 7, a cooling system 8 and a vacuum working chamber 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "disposed", "connected" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1, the specific embodiment of the present invention adopts the following technical solutions: the utility model discloses a plasma spray gun 1, sample platform 2, powder feeder 3, vacuum pump 4, power 5, filtration dust pelletizing system 6, central controller 7, cooling system 8, vacuum studio 9.
The utility model discloses based on original low pressure plasma spraying, adopt the dynamic operating pressure in the large-traffic vacuum pump 4 messenger container reaches the certain degree, and the configuration 1 messenger high-power plasma spray gun of high-power plasma spray gun high temperature powder is followed the spray gun blowout. During heating, the device reaches a certain vaporization rate. The utility model discloses with traditional plasma spraying or low pressure plasma spraying solidification, form spraying and physical vapor deposition to gas/solid mode forms the deposit film.
Preferably, the plasma spray gun 1 is installed on the sample stage 2, and the spray gun 1 is connected with the sample stage 2 and is jointly placed in the vacuum working chamber 9.
Preferably, the central controller 7 is located below the vacuum working chamber 9.
Preferably, the high voltage of the power supply 5 may be generated by a high voltage source installed inside or outside the spray coating system 1.
Preferably, the powder feeder 3 is connected to the vacuum pump 4, and the filtering and dust removing system 6 is connected to the powder feeder 3.
Preferably, the cooling system 8 is located below the filtering and dust removing system 6 and is connected with the vacuum working chamber 9.
The utility model discloses a working environment and the high power high enthalpy value of ultralow pressure plasma spray gun 1, plasma gas flow are 220 standard liters per minute, and spraying power is about 110 kilowatts, and plasma jet form and characteristic all can take place very big change this moment. Plasma gas is heated by electric arc in the vacuum working chamber 9 and is dissociated into high-energy and high-pressure plasma, and the high-energy and high-pressure plasma enters the vacuum working chamber 9 through the plasma torch 1 and then is expanded sharply to form supersonic plasma jet.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A thermal barrier coating apparatus, characterized by: comprises a plasma spray gun (1), a sample table (2), a powder feeder (3), a vacuum pump (4), a power supply (5), a filtering and dedusting system (6), a central controller (7), a cooling system (8) and a vacuum working chamber (9); plasma spray gun (1) welding is in above sample platform (2), plasma spray gun (1) with sample platform (2) are located jointly inside vacuum working chamber (9), powder feeder (3) left side is provided with vacuum pump (4), powder feeder (3) are installed in filtration dust pelletizing system (6) left side, cooling system (8) left side is provided with vacuum working chamber (9), vacuum working chamber (9) are connected with power (5), central controller (7) top is provided with vacuum working chamber (9).
2. A thermal barrier coating arrangement as claimed in claim 1, characterized in that the spraying process is controlled by the central controller (7).
3. A thermal barrier coating device according to claim 1, characterized in that the plasma torch (1) is adapted to inject the spray powder into a plasma jet and to heat it for melting.
4. A thermal barrier coating device according to claim 1, characterized in that the plasma torch (1), the workpiece and the sample stage (2) are located in an ultra low pressure vacuum chamber (9).
5. The thermal barrier coating device of claim 1, wherein the plasma torch (1) has an ultra-low pressure operating environment and a high power and high enthalpy value, the plasma gas flow rate is 220 standard liters per minute, and the spraying power is about 110 kw.
6. A thermal barrier coating device according to claim 1, characterized in that the vacuum pump (4) is of high flow capacity.
7. A thermal barrier coating device according to claim 1, characterized in that the dynamic working pressure of the vacuum working chamber (9) is 80 pa or less.
8. The thermal barrier coating device of claim 6, characterized in that high-temperature powder is ejected from the high-capacity vacuum pump (4) and the high-power plasma spray gun (1).
9. A thermal barrier coating device according to claim 1, characterized in that the high voltage of the power supply (5) is generated by a high voltage source installed inside or outside the spray system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022277950.2U CN213507160U (en) | 2020-10-14 | 2020-10-14 | Thermal barrier coating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022277950.2U CN213507160U (en) | 2020-10-14 | 2020-10-14 | Thermal barrier coating device |
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| CN213507160U true CN213507160U (en) | 2021-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115287600A (en) * | 2022-07-14 | 2022-11-04 | 北京金轮坤天特种机械有限公司 | Plasma physical vapor deposition system and continuous loading spraying control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115287600A (en) * | 2022-07-14 | 2022-11-04 | 北京金轮坤天特种机械有限公司 | Plasma physical vapor deposition system and continuous loading spraying control method |
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