CN105463453B - A kind of thermal barrier coating of interface stability and preparation method thereof - Google Patents
A kind of thermal barrier coating of interface stability and preparation method thereof Download PDFInfo
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- CN105463453B CN105463453B CN201510830081.2A CN201510830081A CN105463453B CN 105463453 B CN105463453 B CN 105463453B CN 201510830081 A CN201510830081 A CN 201510830081A CN 105463453 B CN105463453 B CN 105463453B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Abstract
The present invention provides a kind of thermal barrier coating of interface stability and preparation method thereof, belongs to aero-engine technology field, which is made of YSZ activity diffusion barrier/MCrAlY metals bond coating/aluminized coating/YSZ ceramic topcoats；Wherein YSZ activity diffusion barrier is prepared using electro beam physics vapour deposition method, MCrAlY metal bond coatings are prepared using vacuum arc electroplating method, aluminized coating is prepared using solid powder embedding method or chemical vapor deposition method, YSZ ceramic topcoats are prepared using electro beam physics vapour deposition method, are in typical column crystal structure.The coating has good antioxygenic property and alternating hot and cold circulation ability.This method can not only solve coating interface consistency problem, but also can improve the strain tolerance of coating, to improve the antioxygenic property of high temperature alloy.
Description
Technical field
This technology belongs to aero-engine technology field, the more particularly to thermal barrier coating of a kind of interface stability and its preparation side
Method.
Background technology
As aero-engine develops to high thrust-weight ratio, temperature and pressure is continuously improved in combustion chamber, high turbine entrance temperature
Inlet temperature has become a big feature of high thrust-weight ratio aero-engine.As the kernel component of engine, turbo blade
The long-term impact and erosion for being subjected to high-temperature fuel gas, Service Environment very severe.The high temperature alloy that turbo blade is selected has been subjected to
The challenge of its own service temperature limit.The maximum operation (service) temperature of latest generation nickel base superalloy is also not higher than 1150 at present
DEG C, and already close to the 85% of alloy melting point, then up increase substantially alloy temperature in use it is difficult.According to starting
Machine cooling capacity, the exclusive use as high thrust-weight ratio aero engine turbine blades high-temperature alloy material have been difficult to meet hair
The demand of motivation high speed development.
Thermal barrier coating (TBCs) is generally by high oxidation and corrosion resistance good metal bond coating (PtAl or MCrAlY, M=
Ni, Co or Ni+Co) and the low ceramic topcoats (Y of thermal coefficient2O3Partially stabilized ZrO2, YSZ) and composition.It is widely used in navigating
Empty engine thermal end pieces so that high temperature alloy can bear higher service temperature, improve turbine entrance temperature inlet temperature, together
When also engine life and reliability can be made to increase substantially, fuel consumption reduces, and power performance significantly improves.
Metal bonding coating is as the transition zone between ceramic topcoats and high temperature alloy matrix, and there are two effects mainly：One
It is the thermal stress reduced caused by being mismatched due to coefficient of thermal expansion between ceramic topcoats and high temperature alloy matrix；Second is that improving whole
(YSZ ceramic topcoats are oxygen ion conductors to the high oxidation and corrosion resistance of a thermal barrier coating system, and mostly porous or column crystal knot
Structure, these structures can become the quick diffusion admittance of corrosive medium, aggravate the corrosion of high temperature alloy matrix).The ingredient of adhesive layer
Design has conclusive effect to the binding force etc. of the speed of growth of oxide, ingredient and matrix in Thermal Cycling, and glues
Knot layer material good interface diffusional resistance should be able to be formed with high-temperature alloy base body, to avoid be on active service during occur matrix and
The degeneration of adhesive layer performance (counterdiffusion causes).Common metal bond coating (PtAl or MCrAlY) is being on active service in the process not at present
It can avoid ground and counterdiffusion occur with high temperature alloy matrix, form brittleness counterdiffusion band and open up and mend harmful precipitations such as Mi Dui phases (TCP)
Phase causes alloy structure unstability.The study found that the formation of high-temperature alloy surface brittleness counterdiffusion band and TCP will lead to alloy-based
50% or more the high temperature such as the high cycle fatigue of body and creep rupture life mechanical properties decrease.Meanwhile the inoxidizability in metal bonding coating
Element such as Al, Cr spread the high temperature oxidation corrosion resistance performance decline for also resulting in coating into alloy.
Therefore, how to ensure the interface of coating and high temperature alloy while ensureing metal bonding coating good oxidation resistance energy
Matching and stability become the critical issue of development high-temperature alloy protecting coating.
Invention content
The purpose of the present invention is to provide a kind of good with high temperature alloy interface compatibility, antioxygenic property is excellent, answers transfiguration
The preparation method of the high temperature alloy thermal barrier coating of limit for height.
A kind of thermal barrier coating of interface stability of the present invention, the coating bond bottom by YSZ activity diffusion barrier/MCrAlY metals
Layer/aluminized coating/YSZ ceramic topcoats composition；Wherein YSZ activity diffusion barrier is prepared using electro beam physics vapour deposition method,
MCrAlY metal bond coatings are prepared using vacuum arc electroplating method, and aluminized coating uses solid powder embedding method or chemical gaseous phase
Prepared by deposition method, YSZ ceramic topcoats are prepared using electro beam physics vapour deposition method, is in typical column crystal structure.
A kind of preparation method of the thermal barrier coating of interface stability of the present invention, follows the steps below：
(1) preparation of YSZ activity diffusion barrier：
YSZ activity diffusion barriers are prepared in single crystal super alloy matrix using electro beam physics vapour deposition method, it will be above-mentioned
The test piece for having deposited YSZ activity diffusion barriers carries out air-stable annealing 4~6 hours at 750 DEG C；
(2) preparation of MCrAlY bottoms：
The MCrAlY that the coating surface prepared in step (1) using vacuum arc electroplating method prepares 20~40 μm or so is applied
Then layer carries out diffusion in vacuum at 1050 DEG C and is heat-treated 2~4 hours；
(3) bottom post-processing technology：
Wet blast surface peening planarizing technique is used to diffusion state MCrAlY bottoms prepared by step (2), protection is improved and applies
Bed boundary binding force improves secondary aluminized coating structure；
(4) preparation of aluminized coating：
Secondary aluminising is carried out to the MCrAlY coatings of step (3) using solid entrapping method or chemical vapor deposition method；
(5) calorized coating post-processing technology：
Wet blast processing is carried out to coating prepared by step (4), finishing coating surface promotes Al2O3The quick shape of oxidation film
At；
(6) YSZ ceramic topcoats preparation method：
YSZ ceramic topcoats are prepared on coating prepared by step (5) using electro beam physics vapour deposition method, were prepared
Ion Cleaning is used in journey 5~10 minutes, electron beam heats single crystal super alloy matrix to 850~900 DEG C；
(7) YSZ ceramic topcoats post-processing approach：
Coating prepared by step (6) is subjected at 700~900 DEG C air-stable annealing 4~20 hours, improves thermal boundary painting
The structure stability of layer.
In order to solve the issue of inter-diffusion in traditional MCrAlY coatings between high temperature alloy matrix, in MCrAlY coatings
One layer of active diffusion barrier is added between high temperature alloy matrix.During high-temperature service, high temperature alloy matrix/YSZ activity diffusion
Two layers of continuous richness Al oxide, this two layers richness Al oxidation can be formed at barrier and YSZ activity diffusion barrier/MCrAlY coating interfaces
Object effectively prevents the diffusion between MCrAlY coatings and high temperature alloy matrix, improves between MCrAlY coatings and high temperature alloy matrix
Interface stability.
In order to solve the problems, such as that Al constituent contents are limited in MCrAlY coatings, MCrAlY coatings are carried out at secondary aluminising
Reason makes MCrAlY coating surfaces form one layer of Al layers of richness.Al layers of the richness can form the Al of continuous densification in oxidation process2O3Oxygen
Change film, the interface stability of MCrAlY bottoms and YSZ ceramic topcoats can be improved.
In order to further increase the strain tolerance of thermal barrier coating, YSZ ceramic topcoats use electro beam physics vapour deposition side
Prepared by method, be in typical column crystal structure.
The coating has good antioxygenic property and alternating hot and cold circulation ability.This method can both solve coating interface
Consistency problem, and the strain tolerance of coating can be improved, to improve the antioxygenic property of high temperature alloy.
The present invention has following major advantage compared with prior art：
It (1), both can be in high-temperature oxydation by introducing active diffusion barrier between MCrAlY bottoms and high temperature alloy matrix
Process floating coat/alloy interface both sides in-situ preparation densification Al2O3Film effectively prevents the counterdiffusion of coating and alloy constituent element,
Meanwhile the Al formed by interfacial reaction2O3Film is conducive to improve the adhesiveness of oxide diffusion barrier, improves MCrAlY bottoms
Interface stability between high temperature alloy matrix.
(2) aluminising processing is carried out to MCrAlY bottoms, MCrAlY coating surfaces can be made to form one layer of Al layers of richness.Richness Al
Layer can form the Al of continuous densification in oxidation process2O3Oxidation film improves the boundary between MCrAlY bottoms and YSZ ceramic topcoats
Face stability.
(3), wet blast surface peening planarizing technique is used to diffusion state MCrAlY bottoms, protective coating interface can be improved
Binding force improves aluminized coating structure.
(4), the wet blast processing after aluminized coating helps to improve the structure of ceramic topcoats, improves coating interface binding force.
(5), the columnar crystal structure YSZ ceramic topcoats prepared using electro beam physics vapour deposition (EB-PVD) can improve
The strain tolerance of coating improves protective coating cold-and-heat resistent circulation ability.
(6), the technologies such as the cleaning of ceramic topcoats preparation process intermediate ion, matrix heating assist in removing interface pollution object, carry
High protective coating interface binding power.
(7), ceramic topcoats post-processing helps to improve the structure stability of ceramic topcoats.
(8), the thermal barrier coating system interphase match is good, and antioxygenic property is excellent, and strain tolerance is high.
Description of the drawings
Fig. 1 is that conventional high temperature alloy substrate/1000 DEG C of MCrAlY coating systems aoxidize the Cross Section Morphology after 100h.
Fig. 2 is that high temperature alloy matrix/YSZ activity diffusion barrier/1000 DEG C of MCrAlY coating systems aoxidize the section after 100h
Pattern.
Specific implementation mode
Embodiment 1
A kind of thermal barrier coating of interface stability, the coating is by YSZ activity diffusion barrier/MCrAlY metals bond coating/aluminising
Layer/YSZ ceramic topcoats form；Wherein YSZ activity diffusion barrier is prepared using electro beam physics vapour deposition method, MCrAlY metals
Bond coating is prepared using vacuum arc electroplating method, and aluminized coating uses solid powder embedding method or chemical vapor deposition method system
Standby, YSZ ceramic topcoats are prepared using electro beam physics vapour deposition method, are in typical column crystal structure.
A kind of preparation method of the thermal barrier coating of interface stability of the present invention, follows the steps below：
(1) preparation of YSZ activity diffusion barrier：
It is prepared using electro beam physics vapour deposition method, will the DZ125 samples after wet blast be packed into high temperature first closes
Golden fixture is sent into working vacuum room using straight feeding system, and the heated current of YSZ targets is 1.3~1.5A, DZ125 alloys
The heating temperature of test piece is 850~900 DEG C, and the rotary speed of DZ125 alloy test pieces is 12~15 revs/min, controls sedimentation time
It is 2 μm to make coating layer thickness, and the complete YSZ test pieces of above-mentioned deposition, which are secondly carried out air-stable at 750 DEG C, anneals 4 hours.
(2) preparation of MCrAlY bottoms
Above-mentioned test piece is packed into vacuum arc coating apparatus progress Ion Cleaning and prepares NiCrAlY bottoms, using vacuum electric
Arc electroplating method prepares 20~40 μm or so of MCrAlY coatings in high-temperature alloy surface, and diffusion in vacuum heat is then carried out at 1050 DEG C
Processing 2 hours；Vacuum arc plating method and technology parameter is：700~750A of arc current, coating time 120min, bias -34V.
(3) bottom post-processing technology
Wet blast processing is carried out to above-mentioned diffusion state MCrAlY bottoms, and carry out ultrasonic cleaning, acetone soln embathes, dries
It is dry；Wet blast technological parameter is：White fused alumina fineness of sand is 180 mesh, and emergy content 20%, wind pressure 0.15MPa, blast distance is
180mm。
(4) preparation of aluminized coating
Above-mentioned test piece is installed on special fixture and is fastened with high temperature alloy silk.Test piece is installed in aluminising tank
Carry out secondary aluminising processing.Secondary aluminising is carried out to MCrAlY coatings using solid entrapping method or chemical vapor deposition method；Gu
Body investment specific process parameter is：Using FeAl powder as penetration enhancer, Al2O3For antiseize lubricant, NH4Cl is activator.
(5) calorized coating post-processing technology
Test piece after aluminising is subjected to wet blast processing, and carry out ultrasonic cleaning, acetone soln embathes, dries, promote
Al2O3The quick formation of oxidation film.Wet blast technological parameter is：White fused alumina fineness of sand is 280 mesh, emergy content 35%, wind pressure
0.25MPa, blast distance are 350mm.
(6) YSZ ceramic topcoats preparation method
Above-mentioned test piece is installed on special fixture and is fastened with high temperature alloy silk.
Test piece is installed in load chamber, mechanical pump and lobe pump is opened, is vacuumized, wait for main vacuum chamber, load chamber
Vacuum degree is respectively 5 × 10-2Pa, and when 1Pa opens the slide valve between two Room, is passed through Ar gas, to strip carry out ion Hong
Hit cleaning 10min, it is therefore an objective to remove blade surface dirt, improve the bond strength between coating and matrix.
Test piece and fixture move on to main vacuum chamber after ion is cleared up, and carry out YSZ ceramic topcoats depositions.Deposit the faces YSZ layer work
Skill parameter is：Main vacuum chamber's pressure is 4 × 10-2Pa, and electron gun voltage is 18KV, and target heated current is 1.5A, workpiece rotational frequency
For 15r/min, workpiece heat temperature is 850 DEG C.
(7) YSZ ceramic topcoats post-processing approach
Air-stable annealing is carried out at 700 DEG C to the thermal barrier coating that is deposited 20 hours, improve the tissue of thermal barrier coating
Stability.
Fig. 1 is that conventional high temperature alloy substrate/1000 DEG C of MCrAlY coating systems aoxidize the Cross Section Morphology after 100h.It can from figure
To find out, apparent counterdiffusion band is formd at high temperature alloy matrix and MCrAlY coating interfaces.
Fig. 2 is that high temperature alloy matrix/YSZ activity diffusion barrier/1000 DEG C of MCrAlY coating systems aoxidize the section after 100h
Pattern.As can be seen from Fig., interface forms inert Al during high-temperature service2O3Film both effectively prevents or slows down long-term
Counterdiffusion during military service between alloy/coating system, improves the long-time stability of alloy/coating system, and can guarantee boundary
Necessary metallurgical binding at face.
Claims (1)
1. a kind of preparation method of the thermal barrier coating of interface stability, it is characterised in that follow the steps below：
（1）The preparation of YSZ activity diffusion barriers：It is prepared in single crystal super alloy matrix using electro beam physics vapour deposition method
It is small to be carried out at 850 ~ 900 DEG C air-stable annealing 4 ~ 6 by YSZ activity diffusion barriers for the test piece of the complete YSZ activity diffusion barrier of above-mentioned deposition
When；
（2）The preparation of MCrAlY bottoms：Using vacuum arc electroplating method in step（1）The coating surface of preparation prepares 20 ~ 40 μm
MCrAlY coatings, then at 1050 DEG C carry out diffusion in vacuum be heat-treated 2 ~ 4 hours；
（3）Bottom post-processing technology：To step（2）The diffusion state MCrAlY coatings of preparation use the wet smooth skill of blast surface peening
Art improves protective coating interface binding power, improves secondary aluminized coating structure；
（4）The preparation of aluminized coating：Using solid entrapping method or chemical vapor deposition method to step（3）MCrAlY coatings carry out
Secondary aluminising processing；
（5）Calorized coating post-processing technology：To step（4）The coating of preparation carries out wet blast processing, and finishing coating surface promotes
Al2O3The quick formation of oxidation film；
（6）YSZ ceramic topcoats preparation methods：Using electro beam physics vapour deposition method in step（5）It is made on the coating of preparation
Standby YSZ ceramic topcoats, in preparation process using Ion Cleaning 5 ~ 10 minutes, electron beam heat single crystal super alloy matrix to 850 ~
900℃；
（7）YSZ ceramic topcoats post-processing approach：By step（6）The coating of preparation carries out air-stable annealing at 700 ~ 900 DEG C
4 ~ 20 hours, improve the structure stability of thermal barrier coating.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105734500B (en) * | 2016-04-21 | 2018-08-03 | 西北有色金属研究院 | A kind of resistance to high temperature oxidation thermal barrier coating and preparation method thereof with composite construction |
| CN106244977A (en) * | 2016-08-30 | 2016-12-21 | 北京航空航天大学 | Plasma evaporation deposits a kind of quasi-column structure heat-barrier coating ceramic layer and preparation method thereof |
| CN107345299B (en) * | 2016-12-13 | 2019-09-27 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of turbine blade assemblies thermal barrier coating and preparation method thereof |
| CN108004543A (en) * | 2017-11-30 | 2018-05-08 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of thermal barrier coating of anti-CMAS corrosion and preparation method thereof |
| CN109930102B (en) * | 2019-04-25 | 2021-08-27 | 清华大学 | Novel thermal barrier coating preparation process |
| CN110408931B (en) * | 2019-09-02 | 2024-03-01 | 铜陵学院 | Thermal barrier coating with long service life and preparation method thereof |
| CN111394702A (en) * | 2020-04-03 | 2020-07-10 | 北航（四川）西部国际创新港科技有限公司 | Thermal barrier coating and preparation method and application thereof |
| CN112941451B (en) * | 2021-01-25 | 2022-08-05 | 武汉理工大学 | Method for improving stability of thermal barrier coating in natural environment |
| CN115961248A (en) * | 2022-12-07 | 2023-04-14 | 中国航发动力股份有限公司 | Single crystal blade thermal barrier coating repairing method |
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| US20030138658A1 (en) * | 2002-01-22 | 2003-07-24 | Taylor Thomas Alan | Multilayer thermal barrier coating |
| DE102005053531A1 (en) * | 2005-11-08 | 2007-05-10 | Man Turbo Ag | Heat-insulating protective layer for a component within the hot gas region of a gas turbine |
| JP2007262447A (en) * | 2006-03-27 | 2007-10-11 | Mitsubishi Heavy Ind Ltd | Oxidation-resistant film and its deposition method, thermal barrier coating, heat-resistant member, and gas turbine |
| CN103342016B (en) * | 2013-07-05 | 2016-01-13 | 中国科学院金属研究所 | A kind of high temperature coating and preparation method comprising zirconium oxide active diffusion barrier layer |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |