CN104451672B - A kind of laser powder deposition process of regulation and control thermal barrier coating interface topography - Google Patents
A kind of laser powder deposition process of regulation and control thermal barrier coating interface topography Download PDFInfo
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- CN104451672B CN104451672B CN201410797898.XA CN201410797898A CN104451672B CN 104451672 B CN104451672 B CN 104451672B CN 201410797898 A CN201410797898 A CN 201410797898A CN 104451672 B CN104451672 B CN 104451672B
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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
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
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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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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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
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- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The present invention relates to a kind of laser powder deposition process of regulation and control thermal barrier coating interface topography, metallic matrix is carried out eliminating rust, defat, sandblasting pretreatment；Metal bonding coating is prepared in metallic matrix upper surface by plasma spraying or HVAF；It is deposited on metal bonding coating by laser powder and introduces the controllable clathrum of regular shape, parameter；Ceramic coating is prepared in the outside spraying of clathrum by plasma spraying or electro beam physics vapour deposition.Compared with prior art, the present invention introduces grid in traditional thermal barrier structure by laser powder deposition technique, increase adjacent coating mechanical bond performance and limit levels crackle extending transversely, and it is uniformly distributed the vertical crackle in ceramic layer, so as to significantly improve thermal barrier coating performance and used life.
Description
Technical field
The present invention relates to thermal barrier coating field, sinks more particularly, to a kind of laser powder of regulation and control thermal barrier coating interface topography
Product method.
Background technology
As aero-engine develops to high thrust-weight ratio direction, the raising of turbine inlet temperature (TIT) becomes and needs most asking for solution
Topic.Before aviation at present, turbine inlet temperature (TIT) has been up to 1700 DEG C.Too high temperature environment melts can alloy, high temperature is compacted
The damaging influences such as change, heat exhaustion, final reduction of service life.For solving the problem, main direction is divided into：One prepares newly
Type high-temperature stable alloy；Two are led using high temperature resistant, low grade fever using more advanced cooling technology, three, erosion-resisting thermal barrier coating.
At present, high temperature alloy has basically reached its design limit, and cooling technology is relatively costly and complex process, so high
Effect thermal barrier coating probe into and application becomes practical ways the most.
The thermal barrier coating for using at present and studying is broadly divided into bilayer and multiple structure.Wherein double-decker is that application is most
With a most commonly used class, it is made up of the metal bonding coating of heat-insulated ceramic surface and transition.Wherein bonding layer material is
MCrAlY (M=Ni, Co or Ni and Co) and Pt-NiAl alloys.Ceramic layer material is that 6～8wt% aoxidizes yttrium partially stabilized oxygen
Change zirconium.During decoction being taken hot labour, the thermally grown layer that one layer of main component is aluminium oxide between ceramic layer and metal level, can be produced.
Although thermal barrier coating is widely used to engine thermal end pieces, the service life for increasing which in high temperature was prevented
Early failure is still study hotspot.The technology for preparing thermal expansion coating at present is mainly electro beam physics vapour deposition and plasma heat
Spraying.Although its coating for preparing has features and advantage, after Long Time Thermal circulation, the pressure that TGO growths are produced should
The thermal mismatch stress and Al that power and matrix material cause as thermal coefficient of expansion is mismatched exhausts the generation of the brittlement phase for causing and leads
Interfacial toughness decline etc. is caused to cause the peeling of the growth, propagation and final ceramic layer of TGO and ceramic layer internal fissure.Current laser skill
Application of the art in thermal barrier coating is concentrated mainly on surface ceramii layer modification or the preparation of metal bonding coating, but this is to interface
The inhibitory action of the enhancing of bond strength and cracks can spread is little.It is thus desirable to having innovation in terms of new structure design and dashing forward
Broken.
Content of the invention
The purpose of the present invention is exactly to provide a kind of regulation and control thermal barrier coating to overcome the defect of above-mentioned prior art presence
The processing method of interface topography.Grid is introduced in traditional thermal barrier structure by laser powder deposition technique, is increased adjacent
The mechanical bond performance of coating limit levels crackle extending transversely, and be uniformly distributed the vertical crackle in ceramic layer,
So as to significantly improve thermal barrier coating performance and used life.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of laser powder deposition process of regulation and control thermal barrier coating interface topography, using following steps：
(1) metallic matrix is carried out eliminating rust, defat, sandblasting pretreatment；
(2) metal bonding coating is prepared in metallic matrix upper surface by plasma spraying or HVAF；
(3) it is deposited on metal bonding coating by laser powder and introduces the controllable clathrum of regular shape, parameter；
(4) prepare pottery by plasma spraying or electro beam physics vapour deposition in the outside spraying of clathrum to apply
Layer.
The thickness of described metal bonding coating is 80～200 μm.
Described clathrum is made up of the grid that equidistant, continuous, rectangular cross is distributed, and the width of each grid is 1～
20mm, is highly 0.1～1mm, is have the cambered surface of fixed curvature at the top of grid, the grid line width for constituting grid is 0.1～
1mm.
When clathrum is introduced, using laser powder deposition process.Which mainly melts metal dust by superlaser, leads to
The compact structure crossed needed for the gain of parameter such as the powder sending quantity of control lasing beam diameter, scanning speed, power and metal dust,
Even, spacing and the network of morphology controllable.The rated power of the fibre laser used in this experiment is 500～1000W, swashs
Light beam spot diameter is 0.3～0.8mm, and laser power is 80～120W, and sweep speed is 5～15mm/s, molten with argon protection
Pond, flow are 6L/min, and by the nozzle powder feeding with laser coaxial, powder sending quantity is 2～8g/min to metal dust.
Described thickness of ceramic coating is 0.1～1mm.
Metallic matrix can also deposit clathrum by laser powder after the completion of pretreatment, then after preparing metal bonding coating
Obtain structure of the clathrum between metal bonding coating and metallic matrix.
Compared with prior art, laser powder deposition technique present invention employs between ceramic layer and metal bonding coating layer
Or between metal bonding coating and matrix, introduce continuous, equally distributed clathrum.Clathrum increased ceramic layer and metal
The roughness of bed boundary, so that strengthen the mechanical bonding strength at interface.Effectively can hinder simultaneously above plane, projection grid
Cause the extension of the transversal crack of interlaminar separation, or the propagation direction for changing crackle.During decoction being taken hot labour, grid projection
Top stress is more concentrated, the longitudinal crack for the rule distribution corresponding with grid projection position occur, is conducive to the equal of stress
Even release.Thus the thermal cycle service life of thermal barrier coating is effectively increased.
Description of the drawings
Fig. 1 is the section effect diagram with network thermal barrier coating；
Fig. 2 is the section effect diagram with network thermal barrier coating；
Fig. 3 is the section micro-structure diagram with network thermal barrier coating.
In figure, 1 is metallic matrix, 2 is metal bonding coating, 3 is clathrum, 4 is ceramic layer.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
A kind of laser powder deposition process of regulation and control thermal barrier coating interface topography, using following steps：
(1) metallic matrix 1 is carried out eliminating rust, defat, sandblasting pretreatment；
(2) thickness is prepared for 80～200 μm of metal bonding coatings 2 by plasma spraying or in metallic matrix upper surface.Tool
Body step be by argon and hydrogen plasma high temperature line make Ni-22Cr-10Al-1.0Y (wt%) metallic particles in melt or
Person's slush state, sprays to matrix surface under the drive of line, ultimately forms the coating with layer structure.Before spraying
First by substrate preheating 2 times, spray power is 40kW～80kW, and argon and hydrogen flowing quantity are respectively 80L/min and 15L/min, gold
The powder feeding rate of category powder is 30～50g/min；
(3) it is deposited on metal bonding coating 2 by laser powder and introduces the controllable clathrum 3 of regular shape, parameter, the net
Compartment 3 is made up of the grid that equidistant, continuous, rectangular cross is distributed, and the width of each grid is 1～20mm, highly for 0.1～
1mm, is the cambered surface for having fixed curvature at the top of grid, and the grid line width for constituting grid is 0.1～1mm.The method passes through high energy
Laser melts metal dust, by controlling the gain of parameter such as the powder sending quantity of lasing beam diameter, scanning speed, power and metal dust
The network of required compact structure, uniform, spacing and morphology controllable.The specified work(of the fibre laser used in this experiment
Rate be 500～1000W, laser beam spot diameter be 0.3～0.8mm, laser power be 80～120W, sweep speed be 5～
15mm/s, protects molten bath with argon, and flow is 6L/min, and metal dust is 2 by the nozzle powder feeding with laser coaxial, powder sending quantity
～8g/min.
(4) the outside spraying for being coated in clathrum by plasma spray prepares thickness for 0.1～1mm ceramic coatings 4.Concrete step
Suddenly it is that heating and melting is carried out to the zirconia ceramicss granule that Y contents are 6～8wt% by argon and hydrogen gas plasma line,
High speed impact matrix surface in the presence of line, forms the ceramic layer of continuous uniform.Substrate preheating 4 times before spraying, spraying
Power is respectively 130L/min and 20L/min in 40kW～80kW, argon and hydrogen flowing quantity, and the powder feeding rate of ceramic powder is 30
～50g/min.
The thermal insulation layer construction prepared by said method is as shown in figure 1, in addition, if metallic matrix is in pretreatment
After the completion of by laser powder deposition clathrum, then obtain clathrum after preparing metal bonding coating in metal bonding coating
Structure and metallic matrix between, as shown in Fig. 2 microstructure is as shown in Figure 3.
Continuous by introducing between ceramic layer and metal bonding coating layer or between metal bonding coating and matrix, uniformly
The clathrum of distribution, increased the roughness of ceramic layer and metal bed boundary, so as to strengthen the mechanical bonding strength at interface.Simultaneously
The extension of the transversal crack that effectively can be hindered to cause interlaminar separation higher than plane, projection grid, or change crackle
Propagation direction.During decoction being taken hot labour, grid projection top stress is more concentrated, and the rule corresponding with grid projection position occurs
The longitudinal crack of rule distribution, is conducive to the uniform release of stress.Thus the thermal cycle service life of thermal barrier coating is effectively increased.With
Under be the method specific embodiment.
Embodiment 1
First Hastelloy high temperature alloys matrix is carried out cleaning, deoiled and blasting treatment, then passes through atmospheric plasma
Spraying method is in the NiCrAlY metal bonding coatings that the substrate deposit a layer thickness is 150 μm.According to setup parameter, using sharp
Light powder deposition technique introduces clathrum on its surface as shown in Fig. 2 the spacing between grid is 2.5mm, is highly 500 μm, single
Individual metal grill width is 500 μm, and composition is identical with tack coat, and grid upper surface is cambered surface.The peak power of fibre laser
For 1000W, the spot diameter of laser beam is 600 μm, and laser power is 80～120W, is passed through argon protection molten bath, and its flow is
6L/min, the powder sending quantity of mesh metal powder is 3g/min.Finally by the pottery that air plasma spraying deposit thickness is 200 μm
Enamel coating.After 1150 DEG C of thermal cycles, the area that comes off is more than 50% for the thermal barrier coating (mesh free structure) of traditional structure, and Home Network
Lattice sample only comes off in grid top small area, and its area that always comes off is less than percent 5%.Illustrate that the network is applied to thermal boundary
The layer life-span increases significantly.
Embodiment 2
Routinely flow process, is carried out cleaning, is deoiled to Hastelloy high temperature alloys matrix first, and the oxygen with certain particle diameter
Changing alumina particles carries out blasting treatment.It is set on the matrix according to experiment and clathrum, tool is introduced by laser powder deposition technique
Body parameter is：Mesh spacing is 2.5mm, is highly 130mm, and single mesh width is 500 μm, and composition is Inconel718.Swash
Light device peak power is 1000W, and the spot diameter of electron beam is 600 μm, is passed through argon protection molten bath, and flow is 6L/min, send
Powder amount is 3g/min.Then thereon by metal bonding coating that air plasma spraying deposit thickness is 150 μm and 200 μm and
Ceramic layer.The composition of tack coat is NiCrAlY, and ceramic layer is 8YSZ.After through 1150 DEG C of elevated temperature thermal cycles, when the heat of traditional structure
When barrier coating (mesh free structure) comes off area more than 50%, the coating of the network only occurs without occurring significantly peeling off
Crackle of the length less than mesh spacing.This explanation network can effectively suppress the extension and merging of crackle, so as to effectively carry
The life-span of high thermal barrier coating.
Technical scheme is carried out in present example completely, clearly describe, above description is only an example, it is impossible to represent complete
Portion, is not construed as limiting to the present invention.For any the genuine professional person of the art can conceivable Parameters variation all
Should belong in the protection domain of the claims in the present invention.
Claims (5)
1. a kind of regulation and control thermal barrier coating interface topography laser powder deposition process, it is characterised in that the method adopt following step
Suddenly：
(1) metallic matrix is carried out eliminating rust, defat, sandblasting pretreatment；
(2) metal bonding coating is prepared in metallic matrix upper surface by plasma spraying or HVAF；
(3) it is deposited on metal bonding coating by laser powder and introduces the controllable clathrum of regular shape, parameter；
(4) ceramic coating is prepared in the outside spraying of clathrum by plasma spraying or electro beam physics vapour deposition；
By superlaser so that metal dust melts, by controlling the ginseng such as beam width, position, rate travel and powder sending quantity
Number, the network of compact structure, uniform, spacing and morphology controllable needed for obtaining, the rated power for controlling laser instrument are 500
～1000W, the spot diameter of laser beam are 600 μm, laser power is 80～120W, and when laser powder is deposited, powder send
Powder amount is 3g/min, and leading to argon in deposition process carries out protection molten bath, and argon flow amount is 6L/min, the position of laser beam according to
Desired parameters carry out program setting.
2. the laser powder deposition process of a kind of regulation and control thermal barrier coating interface topography according to claim 1, its feature exists
In the thickness of described metal bonding coating is 80～200 μm.
3. the laser powder deposition process of a kind of regulation and control thermal barrier coating interface topography according to claim 1, its feature exists
In, described clathrum is made up of the grid that equidistant, continuous, rectangular cross is distributed, and the width of each grid is 1～20mm,
It is highly 0.1～1mm, is the cambered surface for having fixed curvature at the top of grid, the grid line width for constituting grid is 0.1～1mm.
4. the laser powder deposition process of a kind of regulation and control thermal barrier coating interface topography according to claim 1, its feature exists
In described thickness of ceramic coating is 0.1～1mm.
5. the laser powder deposition side of a kind of regulation and control thermal barrier coating interface topography according to any one of claim 1-4
Method, it is characterised in that metallic matrix can also deposit clathrum by laser powder after the completion of pretreatment, then it is viscous to prepare metal
Structure of the clathrum between metal bonding coating and metallic matrix is obtained after knot layer.
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| US10675687B2 (en) | 2016-03-24 | 2020-06-09 | GM Global Technology Operations LLC | Method of producing insulating three-dimensional (3D) structures using 3D printing |
| CN106591765B (en) * | 2016-11-25 | 2018-08-17 | 广西大学 | A kind of preparation method of erosion-wear-resisting iron-based composite coating |
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| CN111334744A (en) * | 2020-02-18 | 2020-06-26 | 江苏大学 | Processing method for regulating and controlling micro texture on surface of thermal barrier coating bonding layer by utilizing laser impact |
| JP7372866B2 (en) * | 2020-03-30 | 2023-11-01 | 三菱重工業株式会社 | Ceramic coatings, turbine parts and gas turbines |
| CN112126889B (en) * | 2020-08-21 | 2021-10-01 | 中国地质大学（武汉） | Method for optimizing thermal barrier coating stability by constructing bionic structure through 3D printing |
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| CN114182254A (en) * | 2021-12-07 | 2022-03-15 | 郑州大学 | Coating with super-bonding strength and preparation method thereof |
| CN114540738A (en) * | 2022-01-20 | 2022-05-27 | 华东理工大学 | Preparation method of ultrahigh-temperature anti-scouring thermal barrier coating |
| CN115178881A (en) * | 2022-08-01 | 2022-10-14 | 成都科宁达材料有限公司 | Surface treatment method of alumina ceramic and alumina ceramic/metal heterogeneous brazing method |
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