High-temperature-resistant thermal barrier coating and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant thermal barrier coating and a preparation method thereof, and belongs to the technical field of composite material protection. The high-temperature-resistant thermal barrier coating sequentially comprises a low-aluminum NiCrAlY bonding layer, a Pt layer, a high-aluminum NiCrAlY bonding layer and a YSZ (Yttria Stabilized Zirconia) ceramic layer from inside to outside, and the Al content of the low-aluminum NiCrAlY bonding layer is lower than that of the high-aluminum NiCrAlY bonding layer. The Pt layer is plated between the low-aluminum NiCrAlY bonding layer and the high-aluminum NiCrAlY bonding layer, so that the high-temperature performance, the oxidation resistance, the adhesive force and the durability of the coating are remarkably improved, the service life of the coating is prolonged, the maintenance and replacement frequency is reduced, the heat efficiency of an engine or a turbine system is further improved, the fuel consumption is reduced, and the effects of energy conservation and emission reduction are achieved. The coating prepared through the preparation method can keep structural integrity under the extreme high-temperature condition, it is ensured that a base body operates permanently and stably in the high-temperature environment, a more efficient and reliable protection scheme is provided for high-temperature components in the aerospace and energy field, and the operation performance of the whole system is improved.

Description

Technical Field

[0001] The invention relates to a high-temperature resistant thermal barrier coating and a preparation method thereof, and belongs to the technical field of composite material protection. Background Art

[0002] In recent years, platinum (Pt) plating has gained widespread attention as an innovative coating material to address the limitations of conventional thermal barrier coating (TBC) bond coats. Platinum (Pt) is a precious metal with excellent oxidation resistance and high-temperature stability, exhibiting excellent oxidation resistance, thermal fatigue resistance, and creep resistance at high temperatures. Therefore, platinum plating on a conventional nickel-based alloy bond coat can significantly improve its high-temperature performance and adhesion. Platinum exhibits far superior stability to nickel-based alloys in high-temperature oxidizing environments, effectively reducing the substrate's reaction with oxygen, thereby slowing the oxidation process of the bond coat and protecting it from direct gas contact, improving the coating's oxidation resistance and extending its service life. Furthermore, the Pt coating not only enhances the bond coat's oxidation resistance but also promotes adhesion between the ceramic top layer and the substrate. Platinum's high melting point and favorable thermal expansion properties help mitigate stress caused by thermal expansion mismatch, thereby reducing creep-induced cracking and spalling in the coating and improving the coating's stability in high-temperature and high-stress environments. Due to the high thermal stability of platinum, the platinum-plated layer can maintain a relatively stable structure in high-temperature environments, reducing coating deformation, cracking and oxidation damage, thereby extending the service life of the coating in long-term working environments and meeting the high performance requirements of thermal barrier coatings for high-temperature equipment such as aircraft engines and gas turbines.

[0003] As the performance requirements for high-temperature components such as turbine blades continue to increase in the aerospace and energy sectors, the development of new bond coats with enhanced high-temperature resistance, oxidation resistance, creep resistance, and improved adhesion is crucial to improving the overall performance of TBC systems. The development of new thermal barrier coatings not only enhances the durability and service life of high-temperature components like turbine blades, but also improves the efficiency of engines or turbine systems, enabling them to operate at higher temperatures, increasing thermal efficiency, reducing fuel consumption, and lowering emissions, thereby contributing to energy conservation and emission reduction. Furthermore, with the continuous advancement of turbine blade materials and manufacturing technologies, new coating technologies will further promote the development of aircraft engines, gas turbines, and other high-temperature equipment, meeting increasingly complex engineering requirements. Summary of the Invention

[0004] In order to overcome the problems in the background technology, the object of the present invention is to provide a high-temperature resistant thermal barrier coating and a preparation method thereof.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A high-temperature resistant thermal barrier coating comprises, from the inside out, a low-aluminum NiCrAlY bonding layer, a Pt layer, a high-aluminum NiCrAlY bonding layer and a YSZ ceramic layer; the Al content of the low-aluminum NiCrAlY bonding layer is lower than that of the high-aluminum NiCrAlY bonding layer.

[0007] Preferably, the thickness of the low-aluminum NiCrAlY bonding layer is 50-60 μm; the thickness of the Pt layer is 5-10 μm; the thickness of the high-aluminum NiCrAlY bonding layer is 50-60 μm; the thickness of the YSZ ceramic layer is 200-240 μm. More preferably, the thickness of the Pt layer is 5-8 μm.

[0008] Preferably, the low-aluminum NiCrAlY bonding layer contains the following components in percentage by mass: 6% Al, 24.5% Cr, 1% Y and 68.5% Ni; the high-aluminum NiCrAlY bonding layer contains the following components in percentage by mass: 10% Al, 24.5% Cr, 1% Y, 64.5% Ni.

[0009] Preferably, the YSZ ceramic layer is ZrO2 doped with 7 wt% Y2O3.

[0010] Preferably, the low-aluminum NiCrAlY bonding layer and the high-aluminum NiCrAlY adhesive layer are produced by high-velocity oxygen fuel spraying / vacuum plasma spraying; the Pt layer is produced by chemical Pt plating; and the YSZ ceramic layer is produced by atmospheric plasma spraying.

[0011] The present invention also claims a method for preparing the high-temperature resistant thermal barrier coating, comprising:

[0012] (1) Pre-treating the surface of the nickel-based alloy;

[0013] (2) depositing a low-aluminum NiCrAlY bonding layer on the surface of a nickel-based alloy substrate using a high-velocity oxygen-fuel spraying method;

[0014] (3) Plating a Pt film on the low-aluminum NiCrAlY bonding layer using an electroless Pt plating method. After the coating is deposited, the substrate should be rinsed and dried, and finally the Pt film should be annealed to obtain a Pt layer;

[0015] (5) Depositing a high-aluminum NiCrAlY bonding layer on the surface of the Pt layer using HVOF high-velocity oxygen fuel spraying;

[0016] (6) Depositing a ceramic layer on the high-aluminum NiCrAlY bonding layer using atmospheric plasma spraying;

[0017] (7) Finally, heat treatment is performed to obtain a high-temperature resistant thermal barrier coating.

[0018] Preferably, the pretreatment specifically includes: ultrasonically cleaning the nickel-based alloy substrate, then sandblasting the cleaned nickel-based alloy with Al2O3 particles, and then cleaning and drying the surface of the nickel-based alloy.

[0019] The specific process parameters of the sandblasting are sand pressure, and a sandblasting pressure of 0.5-0.8MPa (about 5-8bar) is selected. Too high a pressure may cause excessive coarsening of the substrate surface or damage the coating pretreatment layer. The sandblasting distance is usually controlled between 100-300mm. A closer sandblasting distance can obtain a higher impact force, but may cause damage to the substrate surface. Too far may reduce the sandblasting effect. The sandblasting time should be adjusted according to the surface roughness required and controlled between 3-15 minutes. For surfaces of larger areas or substrates with higher roughness requirements, the sandblasting time will be extended accordingly. The sandblasting angle is 30-90 °, and the sandblasting angle is adjusted according to the shape of the substrate, the coating requirements, and the relative position of the nozzle and the surface. The sandblasting angle affects the adhesion effect of the coating to the substrate surface.

[0020] As a preferred embodiment of the present invention, the parameters of the high-speed oxygen-fuel spraying method are: spraying pressure of 4-6 MPa, fuel type of hydrogen, propylene or natural gas, powder spraying speed of 800-1200 m / s, spraying distance of 150 mm-250 mm, spraying temperature of 2500-3500 ° C, powder flow rate of 5-25 g / min, and oxygen and fuel flow ratio of 2:1-4:1.

[0021] As a preferred embodiment of the present invention, the parameters of the electroless Pt plating method are as follows: the temperature is controlled at 50-80°C. Excessively high temperatures may result in uneven coating or reduced adhesion. The electroless plating solution consists of 5-10g / L chloroplatinic acid, 0.07-0.2M sulfuric acid, 5-20g / L hardener (such as cobalt or nickel), 0.5-5g / L brightener (such as diethylenetriamine), and 0.1-1g / L grain refiner (such as lead or bismuth). The pH of the electroless plating solution is 3-5, depending on the reducing agent and platinum source used. The deposition time is 30-60 minutes, adjusted according to the desired coating thickness, and the coating thickness is 5-10 microns.

[0022] As a preferred embodiment of the present invention, the annealing treatment is performed at a temperature of 300-600° C. and for a time of 1-3 hours, so as to further improve the density and bonding strength of the platinum layer.

[0023] As a preferred embodiment of the present invention, the atmospheric plasma spraying method employs the following parameters: argon flow rate of 60-100 L / min, nitrogen flow rate of 10-20 L / min, hydrogen flow rate of 5-10 L / min, spray gun voltage of 50-80 V, spray gun current (injection power) of 400-800 A, spray distance of 100-150 mm, powder flow rate of 10-50 g / min, spray temperature of 2500-3000°C, and preheating temperature of 100-300°C. Preheating the substrate material (e.g., nickel-based alloy) can reduce thermal stress during spraying.

[0024] As a preferred embodiment of the present invention, the heat treatment temperature is 1050°C, the time is 2h, and the vacuum degree is 10 -5 Pa.

[0025] The present invention has the following beneficial effects: By plating a Pt layer between the low-aluminum NiCrAlY bonding layer and the high-aluminum NiCrAlY adhesive layer, the present invention significantly improves the high-temperature performance, oxidation resistance, adhesion, and durability of the coating, extending the coating's service life and reducing maintenance and replacement frequency. It also improves the thermal efficiency of the engine or turbine system, reduces fuel consumption, and achieves energy conservation and emission reduction. Furthermore, the coating and substrate prepared by the present invention can maintain their structural integrity under extremely high temperature conditions, ensuring the substrate's long-term and stable operation in high-temperature environments. This provides a more efficient and reliable protection solution for high-temperature components in the aerospace and energy sectors, and enhances the overall system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic cross-sectional view of the high-temperature resistant novel thermal barrier coating prepared in Examples 1-3 of the present invention.

[0027] Figure 2 This is a schematic cross-sectional view of the high-temperature resistant new thermal barrier coating prepared in Comparative Example 5 of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

[0029] Example 1

[0030] A new high-temperature-resistant thermal barrier coating comprises a low-aluminum NiCrAlY bonding layer, a Pt layer, a high-aluminum NiCrAlY bonding layer, and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The low-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 6% Al, 24.5% Cr, 1% Y, and 68.5% Ni. The high-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 10% Al, 24.5% Cr, 1% Y, and 64.5% Ni. The 7YSZ material is ZrO2 doped with 7% Y2O3.

[0031] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0032] (1) Low-aluminum NiCrAlY bonding layer powder, high-aluminum NiCrAlY bonding layer powder, and 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes for later use.

[0033] (2) The nickel-based alloy substrate is ultrasonically cleaned to remove surface oil and impurities. The substrate is then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle is 90 degrees, the pressure is about 5 bar, and the spray gun distance is between 100 mm. The surface is then cleaned and dried. The roughness of the nickel-based alloy surface is 30-35 μm, which facilitates effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0034] (3) A low-aluminum NiCrAlY bonding layer with a thickness of 56 μm is deposited on the surface of a rough nickel-based alloy using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 5 MPa, a fuel type of hydrogen, a spraying speed of 1000 m / s, a spraying distance of 200 mm, a spraying temperature of 3000°C, a powder flow rate of 15 g / min, and an oxygen / fuel ratio of 3:1.

[0035] (4) Plating a Pt film on the low-aluminum NiCrAlY bonding layer using an electroless Pt plating method; the parameters of the electroless Pt plating method are: a temperature of 60° C., a chemical plating solution composed of 8 g / L chloroplatinic acid, 0.1 M sulfuric acid, 10 g / L cobalt as a hardener, 3 g / L diethylenetriamine, and 0.8 g / L lead as a grain refiner, and a pH value of 4.

[0036] (5) After the coating deposition is completed, the substrate should be rinsed to remove the residual chemical solution on the surface.

[0037] (6) After the coating is completed, use warm air or dry it in an oven.

[0038] (7) The Pt film was annealed at 500°C for 2 h to obtain a Pt layer with a thickness of 6 μm.

[0039] (8) A high-aluminum NiCrAlY bonding layer with a thickness of 60 μm was deposited on the Pt layer by using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: spraying pressure of 4 MPa, fuel type of propylene, spraying speed of 800 m / s, spraying distance of 250 mm, spraying temperature of 3000°C, powder flow rate of 20 g / min, and oxygen / fuel ratio of 2:1.

[0040] (9) A 220 μm thick 7YSZ ceramic layer was deposited on the high-aluminum NiCrAlY bonding layer by atmospheric plasma spraying. The atmospheric plasma spraying parameters were: argon flow rate of 80 L / min, nitrogen flow rate of 15 L / min, hydrogen flow rate of 8 L / min, spray gun voltage of 70 V, spray gun current (spray power) of 600 A, spray distance of 150 mm, powder flow rate of 30 g / min, spray temperature of 3000°C, and preheating temperature of 200°C.

[0041] (10) The thermal barrier coating obtained in step (9) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0042] Example 2

[0043] A new high-temperature-resistant thermal barrier coating comprises a low-aluminum NiCrAlY bonding layer, a Pt layer, a high-aluminum NiCrAlY bonding layer, and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The low-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 6% Al, 24.5% Cr, 1% Y, and 68.5% Ni. The high-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 10% Al, 24.5% Cr, 1% Y, and 64.5% Ni. The 7YSZ material is ZrO2 doped with 7% Y2O3.

[0044] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0045] (1) Low-aluminum NiCrAlY bonding layer powder, high-aluminum NiCrAlY bonding layer powder, and 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes.

[0046] (2) The nickel-based alloy substrate was ultrasonically cleaned to remove surface oil and impurities. The substrate was then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle was 60 degrees, the pressure was 5 bar, and the spray gun distance was 10 cm. The surface was then cleaned and dried. The surface roughness of the nickel-based alloy surface was 30 μm, which facilitated effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0047] (3) A low-aluminum NiCrAlY bonding layer with a thickness of 60 μm is deposited on the surface of a rough nickel-based alloy using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 6 MPa, a fuel type of natural gas, a spraying speed of 800 m / s, a spraying distance of 250 mm, a spraying temperature of 3500°C, a powder flow rate of 5 g / min, and an oxygen / fuel ratio of 2:1.

[0048] (4) Plating a Pt film on the low-aluminum NiCrAlY bonding layer using an electroless Pt plating method; the parameters of the electroless Pt plating method are: a temperature of 50°C, a chemical plating solution composed of 10 g / L chloroplatinic acid, 0.2 M sulfuric acid, 20 g / L hardener nickel, 0.5 g / L diethylenetriamine, and 1 g / L grain refiner bismuth, and a pH value of 3.

[0049] (5) After the coating deposition is completed, the substrate should be rinsed to remove the residual chemical solution on the surface.

[0050] (6) After the coating is completed, use warm air or dry it in an oven.

[0051] (7) The Pt film was annealed at 300°C for 1 hour to obtain a Pt layer with a thickness of 10 μm.

[0052] (8) A high-aluminum NiCrAlY bonding layer with a thickness of 50 μm was deposited on the Pt layer by using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: spraying pressure of 5 MPa, fuel type of hydrogen, spraying speed of 900 m / s, spraying distance of 150 mm, spraying temperature of 2500°C, powder flow rate of 5 g / min, and oxygen / fuel ratio of 4:1.

[0053] (9) A 240 μm thick 7YSZ ceramic layer was deposited on the high-aluminum NiCrAlY bonding layer by atmospheric plasma spraying. The atmospheric plasma spraying parameters were: argon flow rate of 60 L / min, nitrogen flow rate of 20 L / min, hydrogen flow rate of 5 L / min, and spray gun voltage of 50 V. The spray gun current (spray power) was 400 A, the spray distance was 100 mm, the powder flow rate was 50 g / min, the spray temperature was 2800°C, and the preheating temperature was 300°C.

[0054] (10) The thermal barrier coating obtained in step (9) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0055] Example 3

[0056] A new high-temperature-resistant thermal barrier coating comprises a low-aluminum NiCrAlY bonding layer, a Pt layer, a high-aluminum NiCrAlY bonding layer, and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The low-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 6% Al, 24.5% Cr, 1% Y, and 68.5% Ni. The high-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 10% Al, 24.5% Cr, 1% Y, and 64.5% Ni. The 7YSZ material is ZrO2 doped with 7% Y2O3.

[0057] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0058] (1) Low-aluminum NiCrAlY bonding layer powder, high-aluminum NiCrAlY bonding layer powder, and 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes.

[0059] (2) The nickel-based alloy substrate was ultrasonically cleaned to remove surface oil and impurities. The substrate was then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle was 30 degrees, the pressure was 8 bar, and the spray gun distance was 30 cm. The surface was then cleaned and dried. The surface roughness of the nickel-based alloy surface was 35 μm, which facilitated effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0060] (3) A low-aluminum NiCrAlY bonding layer with a thickness of 50 μm is deposited on the surface of a rough nickel-based alloy using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 4 MPa, a fuel type of propylene, a spraying speed of 1200 m / s, a spraying distance of 150 mm, a spraying temperature of 2500°C, a powder flow rate of 25 g / min, and an oxygen / fuel ratio of 4:1.

[0061] (4) Plating a Pt film on the low-aluminum NiCrAlY bonding layer using an electroless Pt plating method; the parameters of the electroless Pt plating method are: a temperature of 80° C., a chemical plating solution composed of 5 g / L chloroplatinic acid, 0.07 M sulfuric acid, 5 g / L cobalt as a hardener, 5 g / L diethylenetriamine, and 0.1 g / L lead as a grain refiner, and a pH value of 5.

[0062] (5) After the coating deposition is completed, the substrate should be rinsed to remove the residual chemical solution on the surface.

[0063] (6) After the coating is completed, use warm air or dry it in an oven.

[0064] (7) The Pt film was annealed at 600°C for 3 h to obtain a Pt layer with a thickness of 5 μm.

[0065] (8) A high-aluminum NiCrAlY bonding layer with a thickness of 60 μm was deposited on the Pt layer by using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 6 MPa, a fuel type of natural gas, a spraying speed of 1200 m / s, a spraying distance of 250 mm, a spraying temperature of 3500°C, a powder flow rate of 25 g / min, and an oxygen / fuel ratio of 3:1.

[0066] (9) A 200 μm thick 7YSZ ceramic layer was deposited on the high-aluminum NiCrAlY bonding layer by atmospheric plasma spraying. The atmospheric plasma spraying parameters were: argon flow rate of 100 L / min, nitrogen flow rate of 10 L / min, hydrogen flow rate of 10 L / min, spray gun voltage of 80 V, spray gun current (spray power) of 800 A, spray distance of 150 mm, powder flow rate of 10 g / min, spray temperature of 2500°C, and preheating temperature of 100°C.

[0067] (10) The thermal barrier coating obtained in step (9) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0068] Comparative Example 1

[0069] A novel high-temperature-resistant thermal barrier coating comprises a low-aluminum NiCrAlY bonding layer and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The low-aluminum bonding layer is made of NiCrAlY, which contains the following components by weight: 6% Al, 24.5% Cr, 1% Y, and 68.5% Ni. The 7YSZ is ZrO2 doped with 7% Y2O3 by weight.

[0070] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0071] (1) The low-aluminum NiCrAlY bonding layer powder and the 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes.

[0072] (2) The nickel-based alloy substrate is ultrasonically cleaned to remove surface oil and impurities. The substrate is then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle is 90 degrees, the pressure is about 5 bar, and the spray gun distance is between 100 mm. The surface is then cleaned and dried. The roughness of the nickel-based alloy surface is 30-35 μm, which facilitates effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0073] (3) A low-aluminum NiCrAlY bonding layer with a thickness of 56 μm is deposited on the surface of a rough nickel-based alloy using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 5 MPa, a fuel type of hydrogen, a spraying speed of 1000 m / s, a spraying distance of 200 mm, a spraying temperature of 3000°C, a powder flow rate of 15 g / min, and an oxygen / fuel ratio of 3:1.

[0074] (4) A 220 μm thick 7YSZ ceramic layer was deposited on the low-aluminum NiCrAlY bonding layer by atmospheric plasma spraying. The atmospheric plasma spraying parameters were: argon flow rate of 80 L / min, nitrogen flow rate of 15 L / min, hydrogen flow rate of 8 L / min, spray gun voltage of 70 V, spray gun current (spray power) of 600 A, spray distance of 150 mm, powder flow rate of 30 g / min, spray temperature of 3000°C, and preheat temperature of 200°C.

[0075] (5) The thermal barrier coating obtained in step (4) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0076] Comparative Example 2

[0077] A novel high-temperature-resistant thermal barrier coating comprises a high-aluminum NiCrAlY bonding layer and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The high-aluminum bonding layer is made of NiCrAlY, which contains the following components by weight: 10% Al, 24.5% Cr, 1% Y, and 64.5% Ni. The 7YSZ is ZrO2 doped with 7% Y2O3 by weight.

[0078] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0079] (1) The high-aluminum NiCrAlY bonding layer powder and the 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes.

[0080] (2) The nickel-based alloy substrate is ultrasonically cleaned to remove surface oil and impurities. The substrate is then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle is 90 degrees, the pressure is about 5 bar, and the spray gun distance is between 100 mm. The surface is then cleaned and dried. The roughness of the nickel-based alloy surface is 30-35 μm, which facilitates effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0081] (3) A high-aluminum NiCrAlY bonding layer with a thickness of 60 μm is deposited on the surface of the nickel-based alloy by using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 4 MPa, a fuel type of propylene, a spraying speed of 800 m / s, a spraying distance of 250 mm, a spraying temperature of 3000°C, a powder flow rate of 20 g / min, and an oxygen / fuel ratio of 2:1.

[0082] (4) A 220 μm thick 7YSZ ceramic layer was deposited on the high-aluminum NiCrAlY bonding layer by atmospheric plasma spraying. The atmospheric plasma spraying parameters were: argon flow rate of 80 L / min, nitrogen flow rate of 15 L / min, hydrogen flow rate of 8 L / min, spray gun voltage of 70 V, spray gun current (spray power) of 600 A, spray distance of 150 mm, powder flow rate of 30 g / min, spray temperature of 3000°C, and preheating temperature of 200°C.

[0083] (5) The thermal barrier coating obtained in step (4) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0084] Comparative Example 3

[0085] A new high-temperature-resistant thermal barrier coating comprises a low-aluminum NiCrAlY bonding layer, a high-aluminum NiCrAlY bonding layer, and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The low-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 6% Al, 24.5% Cr, 1% Y, and 68.5% Ni. The high-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 10% Al, 24.5% Cr, 1% Y, and 64.5% Ni. The 7YSZ material is ZrO2 doped with 7% Y2O3.

[0086] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0087] (1) Low-aluminum NiCrAlY bonding layer powder, high-aluminum NiCrAlY bonding layer powder, and 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes.

[0088] (2) The nickel-based alloy substrate is ultrasonically cleaned to remove surface oil and impurities. The substrate is then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle is 90 degrees, the pressure is about 5 bar, and the spray gun distance is between 100 mm. The surface is then cleaned and dried. The roughness of the nickel-based alloy surface is 30-35 μm, which facilitates effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0089] (3) A low-aluminum NiCrAlY bonding layer with a thickness of 56 μm is deposited on the surface of a rough nickel-based alloy using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 5 MPa, a fuel type of hydrogen, a spraying speed of 1000 m / s, a spraying distance of 200 mm, a spraying temperature of 3000°C, a powder flow rate of 15 g / min, and an oxygen / fuel ratio of 3:1.

[0090] (4) A high-aluminum NiCrAlY bonding layer with a thickness of 60 μm was deposited on the low-aluminum NiCrAlY bonding layer using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 4 MPa, a fuel type of propylene, a spraying speed of 800 m / s, a spraying distance of 250 mm, a spraying temperature of 3000°C, a powder flow rate of 20 g / min, and an oxygen / fuel ratio of 2:1.

[0091] (5) A 220 μm thick 7YSZ ceramic layer was deposited on the high-aluminum NiCrAlY bonding layer by atmospheric plasma spraying. The atmospheric plasma spraying parameters were: argon flow rate of 80 L / min, nitrogen flow rate of 15 L / min, hydrogen flow rate of 8 L / min, spray gun voltage of 70 V, spray gun current (spray power) of 600 A, spray distance of 150 mm, powder flow rate of 30 g / min, spray temperature of 3000°C, and preheating temperature of 200°C.

[0092] (6) The thermal barrier coating obtained in step (5) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0093] Comparative Example 4

[0094] A new high-temperature-resistant thermal barrier coating comprises a high-aluminum NiCrAlY bonding layer, a low-aluminum NiCrAlY bonding layer, and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The low-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 6% Al, 24.5% Cr, 1% Y, and 68.5% Ni. The high-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 10% Al, 24.5% Cr, 1% Y, and 64.5% Ni. The 7YSZ material is ZrO2 doped with 7% Y2O3.

[0095] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0096] (1) Low-aluminum NiCrAlY bonding layer powder, high-aluminum NiCrAlY bonding layer powder, and 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes.

[0097] (2) The nickel-based alloy substrate is ultrasonically cleaned to remove surface oil and impurities. The substrate is then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle is 90 degrees, the pressure is about 5 bar, and the spray gun distance is between 100 mm. The surface is then cleaned and dried. The roughness of the nickel-based alloy surface is 30-35 μm, which facilitates effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0098] (3) A high-aluminum NiCrAlY bonding layer with a thickness of 60 μm is deposited on a rough nickel-based alloy surface using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 4 MPa, a fuel type of propylene, a spraying speed of 800 m / s, a spraying distance of 250 mm, a spraying temperature of 3000°C, a powder flow rate of 20 g / min, and an oxygen / fuel ratio of 2:1.

[0099] (4) A low-aluminum NiCrAlY bonding layer with a thickness of 56 μm was deposited on the surface of the high-aluminum NiCrAlY bonding layer by using the HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: spraying pressure of 5 MPa, fuel type of hydrogen, spraying speed of 1000 m / s, spraying distance of 200 mm, spraying temperature of 3000°C, powder flow rate of 15 g / min, and oxygen / fuel ratio of 3:1.

[0100] (5) A 220 μm thick 7YSZ ceramic layer was deposited on the low-aluminum NiCrAlY bonding layer by atmospheric plasma spraying. The atmospheric plasma spraying parameters were: argon flow rate of 80 L / min, nitrogen flow rate of 15 L / min, hydrogen flow rate of 8 L / min, spray gun voltage of 70 V, spray gun current (spray power) of 600 A, spray distance of 150 mm, powder flow rate of 30 g / min, spray temperature of 3000°C, and preheating temperature of 200°C.

[0101] (6) The thermal barrier coating obtained in step (5) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0102] Comparative Example 5

[0103] A new high-temperature-resistant thermal barrier coating comprises a high-aluminum NiCrAlY bonding layer, a Pt layer, a low-aluminum NiCrAlY bonding layer, and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The low-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 6% Al, 24.5% Cr, 1% Y, and 68.5% Ni. The high-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 10% Al, 24.5% Cr, 1% Y, and 64.5% Ni. The 7YSZ material is ZrO2 doped with 7% Y2O3.

[0104] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0105] (1) Low-aluminum NiCrAlY bonding layer powder, high-aluminum NiCrAlY bonding layer powder, and 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes for later use.

[0106] (2) The nickel-based alloy substrate is ultrasonically cleaned to remove surface oil and impurities. The substrate is then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle is 90 degrees, the pressure is about 5 bar, and the spray gun distance is between 100 mm. The surface is then cleaned and dried. The roughness of the nickel-based alloy surface is 30-35 μm, which facilitates effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0107] (3) A high-aluminum NiCrAlY bonding layer with a thickness of 60 μm is deposited on a rough nickel-based alloy surface using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 4 MPa, a fuel type of propylene, a spraying speed of 800 m / s, a spraying distance of 250 mm, a spraying temperature of 3000°C, a powder flow rate of 20 g / min, and an oxygen / fuel ratio of 2:1.

[0108] (4) Plating a Pt film on the high-aluminum NiCrAlY bonding layer using an electroless Pt plating method; the parameters of the electroless Pt plating method are: a temperature of 60° C., a chemical plating solution composed of 8 g / L chloroplatinic acid, 0.1 M sulfuric acid, 10 g / L cobalt as a hardener, 3 g / L diethylenetriamine, and 0.8 g / L lead as a grain refiner, and a pH value of 4.

[0109] (5) After the coating deposition is completed, the substrate should be rinsed to remove the residual chemical solution on the surface.

[0110] (6) After the coating is completed, use warm air or dry it in an oven.

[0111] (7) The Pt film was annealed at 500°C for 1 h to obtain a Pt layer with a thickness of 6 μm.

[0112] (8) A low-aluminum NiCrAlY bonding layer with a thickness of 56 μm was deposited on the Pt layer by using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 5 MPa, a fuel type of hydrogen, a spraying speed of 1000 m / s, a spraying distance of 200 mm, a spraying temperature of 3000°C, a powder flow rate of 15 g / min, and an oxygen / fuel ratio of 3:1.

[0113] (9) A 220 μm thick 7YSZ ceramic layer was deposited on the high-aluminum NiCrAlY bonding layer by atmospheric plasma spraying. The atmospheric plasma spraying parameters were: argon flow rate of 80 L / min, nitrogen flow rate of 15 L / min, hydrogen flow rate of 8 L / min, spray gun voltage of 70 V, spray gun current (spray power) of 600 A, spray distance of 150 mm, powder flow rate of 30 g / min, spray temperature of 3000°C, and preheating temperature of 200°C.

[0114] (10) The thermal barrier coating obtained in step (9) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0115] Comparative Example 6

[0116] A novel high-temperature-resistant thermal barrier coating comprises a low-aluminum NiCrAlY bonding layer, a high-aluminum NiCrAlY bonding layer, a Pt layer, and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The low-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 6% Al, 24.5% Cr, 1% Y, and 68.5% Ni. The high-aluminum bonding layer is made of NiCrAlY, containing the following weight percentages: 10% Al, 24.5% Cr, 1% Y, and 64.5% Ni. The 7YSZ material is ZrO2 doped with 7% Y2O3.

[0117] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0118] (1) Low-aluminum NiCrAlY bonding layer powder, high-aluminum NiCrAlY bonding layer powder, and 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes.

[0119] (2) The nickel-based alloy substrate is ultrasonically cleaned to remove surface oil and impurities. The substrate is then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle is 90 degrees, the pressure is about 5 bar, and the spray gun distance is between 100 mm. The surface is then cleaned and dried. The roughness of the nickel-based alloy surface is 30-35 μm, which facilitates effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0120] (3) A low-aluminum NiCrAlY bonding layer with a thickness of 56 μm is deposited on the surface of a rough nickel-based alloy using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 5 MPa, a fuel type of hydrogen, a spraying speed of 1000 m / s, a spraying distance of 200 mm, a spraying temperature of 3000°C, a powder flow rate of 15 g / min, and an oxygen / fuel ratio of 3:1.

[0121] (4) A high-aluminum NiCrAlY bonding layer with a thickness of 60 μm was deposited on the low-aluminum NiCrAlY bonding layer using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 4 MPa, a fuel type of propylene, a spraying speed of 800 m / s, a spraying distance of 250 mm, a spraying temperature of 3000°C, a powder flow rate of 20 g / min, and an oxygen / fuel ratio of 2:1.

[0122] (5) Plating a Pt film on the high-aluminum NiCrAlY bonding layer using an electroless Pt plating method; the parameters of the electroless Pt plating method are: a temperature of 60° C., a chemical plating solution composed of 8 g / L chloroplatinic acid, 0.1 M sulfuric acid, 10 g / L cobalt as a hardener, 3 g / L diethylenetriamine, and 0.8 g / L lead as a grain refiner, and a pH value of 4.

[0123] (6) After the coating deposition is completed, the substrate should be rinsed to remove the residual chemical solution on the surface.

[0124] (7) After the coating is completed, use warm air or dry it in an oven.

[0125] (8) The Pt film was annealed at 500°C for 1 h to obtain a Pt layer with a thickness of 6 μm.

[0126] (9) A 220 μm thick 7YSZ ceramic layer was deposited on the Pt film by atmospheric plasma spraying. The atmospheric plasma spraying parameters were: argon flow rate of 80 L / min, nitrogen flow rate of 15 L / min, hydrogen flow rate of 8 L / min, and spray gun voltage of 70 V. The spray gun current (spray power) was 600 A, the spray distance was 150 mm, the powder flow rate was 30 g / min, the spray temperature was 3000°C, and the preheating temperature was 200°C.

[0127] (10) The thermal barrier coating obtained in step (9) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0128] Comparative Example 7

[0129] A novel high-temperature-resistant thermal barrier coating comprises a low-aluminum NiCrAlY bonding layer, a Pt layer, and a 7YSZ ceramic layer, sequentially sprayed onto a nickel-based alloy surface. The low-aluminum bonding layer is made of NiCrAlY, which contains the following components by weight: 6% Al, 24.5% Cr, 1% Y, and 68.5% Ni. The 7YSZ is ZrO2 doped with 7% Y2O3.

[0130] A method for preparing a high-temperature resistant thermal barrier coating comprises:

[0131] (1) The low-aluminum NiCrAlY bonding layer powder and the 7YSZ ceramic powder were dried in an oven at 80° C. for 180 minutes.

[0132] (2) The nickel-based alloy substrate is ultrasonically cleaned to remove surface oil and impurities. The substrate is then sandblasted with Al2O3 particles to increase surface roughness. The sandblasting angle is 90 degrees, the pressure is about 5 bar, and the spray gun distance is between 100 mm. The surface is then cleaned and dried. The roughness of the nickel-based alloy surface is 30-35 μm, which facilitates effective physical bonding between the coating and the substrate, thereby improving the bonding strength between the coating and the substrate.

[0133] (3) A low-aluminum NiCrAlY bonding layer with a thickness of 56 μm is deposited on the surface of a rough nickel-based alloy using an HVOF high-velocity oxygen fuel spraying method; the specific parameters of the HVOF high-velocity oxygen fuel spraying method include: a spraying pressure of 5 MPa, a fuel type of hydrogen, a spraying speed of 1000 m / s, a spraying distance of 200 mm, a spraying temperature of 3000°C, a powder flow rate of 15 g / min, and an oxygen / fuel ratio of 3:1.

[0134] (4) Plating a Pt film on the low-aluminum NiCrAlY bonding layer using an electroless Pt plating method; the parameters of the electroless Pt plating method are: a temperature of 60° C., a chemical plating solution composed of 8 g / L chloroplatinic acid, 0.1 M sulfuric acid, 10 g / L cobalt as a hardener, 3 g / L diethylenetriamine, and 0.8 g / L lead as a grain refiner, and a pH value of 4.

[0135] (5) After the coating deposition is completed, the substrate should be rinsed to remove the residual chemical solution on the surface.

[0136] (6) After the coating is completed, use warm air or dry it in an oven.

[0137] (7) The Pt film was annealed at 500°C for 1 h to obtain a Pt layer with a thickness of 6 μm.

[0138] (8) A 220 μm thick 7YSZ ceramic layer was deposited on the Pt layer by atmospheric plasma spraying. The atmospheric plasma spraying parameters were as follows: argon flow rate of 80 L / min, nitrogen flow rate of 15 L / min, hydrogen flow rate of 8 L / min, and spray gun voltage of 70 V. The spray gun current (spray power) was 600 A, the spray distance was 150 mm, the powder flow rate was 30 g / min, the spray temperature was 3000°C, and the preheating temperature was 200°C.

[0139] (9) The thermal barrier coating obtained in step (8) was heated to 1050°C and vacuum to 10 -5 Pa was heat treated for 2 hours.

[0140] Effect Examples

[0141] The service life results of the high-temperature resistant new thermal barrier coatings obtained in the examples and comparative examples are shown in Table 1.

[0142] Table 1

[0143]

[0144]

[0145] According to Examples 1-3 and Comparative Examples 1-7, the high-temperature resistant new thermal barrier coating prepared in the examples has a long service life, and the Pt layer plated between the low-aluminum NiCrAlY bonding layer and the high-aluminum NiCrAlY bonding layer by chemical Pt film plating significantly improves the high-temperature service life of the thermal barrier coating.

[0146] Compared to Comparative Examples 1-4, Example 1-3 utilizes an electroless Pt plating method to deposit a Pt film. The structure and function of the coating are optimized by utilizing the synergistic effects of a low-aluminum NiCrAlY bonding layer, a Pt layer, and a high-aluminum NiCrAlY bonding layer. The platinum layer not only exhibits excellent oxidation resistance and high-temperature resistance, but also improves the bonding strength between the coatings, preventing delamination between the top ceramic layer and the substrate. The high-aluminum bonding layer further enhances the bonding layer's high-temperature resistance and creep resistance. This hierarchical design effectively mitigates the substrate's oxidation, creep, and thermal stress at high temperatures, enhancing the overall performance and service life of the coating and improving its stability and adhesion at high temperatures. At high temperatures, aluminum diffuses from the low-aluminum NiCrAlY bonding layer to the high-aluminum NiCrAlY bonding layer, providing the necessary aluminum source for the formation of a dense aluminum oxide (Al2O3) layer. The alumina layer is a protective layer that is stable at high temperatures and has excellent anti-oxidation properties. It can effectively prevent oxygen and high-temperature gases from directly contacting the substrate material, slowing down the oxidation process and enhancing the high-temperature resistance and corrosion resistance of the coating. Platinum can also promote good bonding between the coating and the top ceramic layer, enhance the adhesion of the coating, and extend the service life of the thermal barrier coating.

[0147] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A high-temperature resistant thermal barrier coating, characterized in that: It comprises, from the inside out, a low-aluminum NiCrAlY bonding layer, a Pt layer, a high-aluminum NiCrAlY bonding layer and a YSZ ceramic layer; the Al content of the low-aluminum NiCrAlY bonding layer is lower than that of the high-aluminum NiCrAlY bonding layer.

2. The high-temperature resistant thermal barrier coating according to claim 1, characterized in that: The thickness of the low-aluminum NiCrAlY bonding layer is 50-60 μm; the thickness of the Pt layer is 5-10 μm; the thickness of the high-aluminum NiCrAlY bonding layer is 50-60 μm; and the thickness of the YSZ ceramic layer is 200-240 μm.

3. The high temperature resistant thermal barrier coating according to claim 1, characterized in that: The low-aluminum NiCrAlY bonding layer contains the following components in percentage by mass: 6% Al, 24.5% Cr, 1% Y and 68.5% Ni; the high-aluminum NiCrAlY bonding layer contains the following components in percentage by mass: 10% Al, 24.5% Cr, 1% Y, 64.5% Ni.

4. The high temperature resistant thermal barrier coating according to claim 1, characterized in that: The low-aluminum NiCrAlY bonding layer and the high-aluminum NiCrAlY adhesive layer are prepared by high-velocity oxygen fuel spraying / vacuum plasma spraying; the Pt layer is prepared by chemical Pt plating; and the YSZ ceramic layer is prepared by atmospheric plasma spraying.

5. The method for preparing a high-temperature resistant thermal barrier coating according to any one of claims 1 to 4, characterized in that: The steps include: (1) Pre-treating the surface of the nickel-based alloy; (2) depositing a low-aluminum NiCrAlY bonding layer on the surface of a nickel-based alloy substrate using a high-velocity oxygen-fuel spraying method; (3) Plating a Pt film on the low-aluminum NiCrAlY bonding layer using an electroless Pt plating method. After the coating is deposited, the substrate should be rinsed and dried, and finally the Pt film should be annealed to obtain a Pt layer; (5) Depositing a high-aluminum NiCrAlY bonding layer on the surface of the Pt layer using HVOF high-velocity oxygen fuel spraying; (6) Depositing a ceramic layer on the high-aluminum NiCrAlY bonding layer using atmospheric plasma spraying; (7) Finally, heat treatment is performed to obtain a high-temperature resistant thermal barrier coating.

6. The method for preparing a high-temperature resistant thermal barrier coating according to claim 5, characterized in that: The parameters of the high-speed oxygen-fuel spraying method are: spraying pressure of 4-6 MPa, fuel type of hydrogen, propylene or natural gas, spraying speed of low-aluminum NiCrAlY bonding layer powder or high-aluminum NiCrAlY bonding layer powder of 800-1200 m / s, spraying distance of 150 mm-250 mm, spraying temperature of 2500-3500°C, powder flow rate of 5-25 g / min, and oxygen to fuel flow ratio of 2:1-4:

1.

7. The method for preparing a high-temperature resistant thermal barrier coating according to claim 5, characterized in that: The parameters of the chemical Pt plating method are: temperature of 50-80° C.; chemical plating solution composed of 5-10 g / L chloroplatinic acid, 0.07-0.2 M sulfuric acid, 5-20 g / L hardener, 0.5-5 g / L brightener, 0.1-1 g / L grain refiner, pH value of 3-5; coating deposition time of 30-60 minutes.

8. The method for preparing a high-temperature resistant thermal barrier coating according to claim 5, characterized in that: The annealing treatment is performed at a temperature of 300-600° C. and for a time of 1-3 hours.

9. The method for preparing a high-temperature resistant thermal barrier coating according to claim 5, characterized in that: The parameters of the atmospheric plasma spraying method are: argon flow rate of 60-100 L / min, nitrogen flow rate of 10-20 L / min, hydrogen flow rate of 5-10 L / min, spray gun voltage of 50-80 V, spray gun current of 400-800 A, spraying distance of 100-150 mm, powder flow rate of 10-50 g / min, spraying temperature of 2500° C.-3000° C., and preheating temperature of 100-300° C.

10. The method for preparing a high-temperature resistant thermal barrier coating according to claim 5, characterized in that: The heat treatment temperature is 1050℃-1250℃, the time is 1-2h, and the vacuum degree is 10 -5 Pa.

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