CN108018522A - A kind of heat-barrier coating ceramic layer of complications column structure and preparation method thereof - Google Patents
A kind of heat-barrier coating ceramic layer of complications column structure and preparation method thereof Download PDFInfo
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- CN108018522A CN108018522A CN201711298879.2A CN201711298879A CN108018522A CN 108018522 A CN108018522 A CN 108018522A CN 201711298879 A CN201711298879 A CN 201711298879A CN 108018522 A CN108018522 A CN 108018522A
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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
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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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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- 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
- C23C4/11—Oxides
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Abstract
The invention belongs to Thermal Barrier Coating Technologies field, is related to a kind of heat-barrier coating ceramic layer of tortuous column structure and preparation method thereof.The present invention provides a kind of heat-barrier coating ceramic layer of tortuous column structure and preparation method thereof, its heat-barrier coating ceramic layer 3 has the tortuous column structure with 1 surface normal direction of matrix at an angle, and preparation process is as follows:Using plasma spraying gas phase deposition technology, after being sent into heat-barrier coating ceramic layer powder, powder evaporates to form gas phase.By the multiple conversion of angle between 1 deposition surface of matrix in spraying process and plasma jet 5, the deposition growing direction of 3 column structure of ceramic layer is adjusted, is obtained with the tortuous column structure heat-barrier coating ceramic layer with 1 surface normal direction of matrix at an angle.Tortuous column structure heat-barrier coating ceramic layer prepared by the present invention can increase substantially heat-proof quality and resistance to high temperature corrosion ability.
Description
Technical field
The invention belongs to Thermal Barrier Coating Technologies field, is related to a kind of heat-barrier coating ceramic layer and its system of tortuous column structure
Preparation Method.
Background technology
The development of the industries such as aerospace, energy source and power proposes higher to aero-engine and industry gas turbine and wants
Ask.Engine thermal end pieces are on active service in the complex condition of high temperature, corrosion, wear for a long time, and working environment is more and more harsher,
Surface property requirement to hot-end component is higher and higher.At present in the important high-temperature component such as engine blade, combustion chamber, jet pipe
On must use the thermal barrier coating of more efficient cooling technology and higher heat-proof quality.Corresponding thermal barrier coating technology of preparing also needs
Innovate and develop.
Thermal barrier coating(TBCs)It is using the superior high temperature resistant of ceramic material, anticorrosive and low heat conductivity energy, with coating
Mode is mutually compound with metallic matrix by ceramics, improves the temperature in use and oxidation-resistance property of hot-end component, extends hot junction portion
The service life of part, improves a kind of surface protection technique of engine efficiency.The preparation method of thermal barrier coating mainly has electricity at present
Beamlet physical vapour deposition (PVD)(EB-PVD)And plasma spraying(PS)Technology.The coating structure that two methods obtain is different, performance
Respectively there is quality.PS is efficient, and cost is low.Coating is lamellar structure, and heat-proof quality is good.But between coating and matrix it is machinery
With reference to bond strength is general, while lamellar structural strain tolerance limit is low, is easily peeled off too early under thermal shock.Therefore APS coatings
It is commonly used on the relatively low guide vane of temperature.And temperature in use higher, the more complicated various important hot-end components of operating mode are
Using EB-PVD thermal barrier coatings.
Plasma spraying gas phase deposition technology(PS-PVD)It is the one kind to grow up on the basis of low-voltage plasma spraying
New vapour deposition coating method.100 more than the kW high powered plasma spray guns of technical configuration, operating air pressure are generally less than
150 Pa.During spraying, high enthalpy gas, which is heated by the electric arc simultaneously, is dissociated into plasma, and plasma is drastically swollen by jet expansion
It is swollen, the plasma jet of supersonic speed high-energy is formed, for length more than 2 m, diametric(al) is expanded into 200-400 mm.Due to wait from
Sub- jet energy is sufficiently high, and dusty spray can be formed by evaporation to gas phase atom, the composite diphase material based on gas phase material or gas phase
Matrix surface is ejected into plasma jet, deposition forms columnar crystal structure.Research finds, plasma physical vapor deposition technique system
Standby columnar crystal structure thermal barrier coating has preferable comprehensive performance, its heat-proof quality is apparently higher than EB-PVD, close to PS;Heat is followed
The ring service life apparently higher than PS, close to EB-PVD coatings.
Existing heat-barrier coating ceramic layer, is either prepared by EB-PVD and plasma spraying gas phase deposition technology
Be vertical pillar crystal structure.Inevitably hang down between vertical pillar crystalline substance there are substantial amounts of down suction from coating surface
Matrix is directly extended through always downwards, because this beeline channel distance is short, passage just hinders few, heat in straight(With high-temperature fuel gas
For carrier)And corrosive medium(The molten oxide that the gravel dust sucked such as engine is formed)Entrance and diffusion become very
Quickly, coating is heat-insulated and resistance to high temperature corrosion ability reduces.
The content of the invention
For the heat-barrier coating ceramic layer of existing vertical pillar crystal structure, high temperature is fired there are substantial amounts of down suction
The problem of entrance and diffusion of gas and molten corrosive medium can not form inhibition.
Described in order to solve the problems, such as, the technical solution adopted in the present invention is to provide a kind of thermal boundary of tortuous column structure
Coating ceramic layer, its heat-barrier coating ceramic layer are characterized in the column structure with non-perpendicular growth, the column structure and base
The complications of 1 surface normal direction of body at an angle, the angle between 1 surface normal direction of the complications column structure and matrix are
0 ° of tortuous angle α, 60 ° >=α >, the tortuous changed number of the column structure direction of growth are tortuous number A, 10 times >=A >=1
It is secondary.
Preferably, the angle between the 1 surface normal direction of tortuous column structure and matrix is tortuous angle α, most
Excellent is 45 ° >=α >=10 °, and the tortuous changed number of the column structure direction of growth is tortuous number A, and optimal is 5 times >=A >=1
It is secondary.
Meanwhile the present invention provides a kind of preparation method of the heat-barrier coating ceramic layer of tortuous column structure, the preparation
Method is plasma spraying gas phase deposition technology, is to carry out plasma spray in the environment of vacuum chamber pressure is not higher than 150 Pa
Apply, heat-barrier coating ceramic layer powder is evaporated into realization after plasma jet 5, and the complex phase based on formation gas phase or gas phase, carries out
Coating deposits, wherein including ceramic layer 3 are prepared on matrix 1 the step of, deposited ceramic layer 3, matrix 1 is fixed in vacuum chamber
Workpiece motion s platform on;Vacuum chamber is closed, is vacuumized, until the Pa of pressure≤150 of vacuum chamber;Pre-oxidation treatment:In vacuum chamber
The Pa of pressure≤150, oxygen flow 1-3 L/min under the conditions of, 1 temperature control of matrix at 900-1100 DEG C, blow by plasma flame flow
Sweep 5-20 min;It is sent into ceramic layer powder;It is made with the tortuous column structure with 1 surface normal direction of matrix at an angle
Heat-barrier coating ceramic layer;Preparation terminates.
Preferably, the step of preparation method of the heat-barrier coating ceramic layer of the tortuous column structure includes, and prepares
Matrix 1, is ground, polishes and cleans to the surface of tack coat 2 on matrix 1, and holding surface is clean, surface roughness Ra < 2
μm。
Preferably, need to keep between the surface of depositing coating 4 and plasma jet 5 in matrix in preparing spraying process 1
Certain angle beta, 90 ° of > β >=0 °, matrix 1 turns to other side after spraying a period of time, and 1 surface of matrix and plasma are penetrated
Equal angular β is kept between stream 5.Matrix 1 turns to original side after spraying a period of time again, keeps equal angular β, so follows
Ring.1 number of revolutions B of matrix in spraying process depends on the tortuous number A, 10 times >=number of revolutions B=complications of coating structure
Number A >=1 time.By the multiple conversion of angle between 1 deposition surface of matrix and plasma jet 5,3 column knot of ceramic layer is adjusted
The deposition growing direction of structure.
Preferably, β is kept at an angle between the surface of the depositing coating 4 and plasma jet 5, it is optimal to be
60 ° of > β >=20 °, matrix 1 turns to other side after spraying a period of time, is kept between 1 surface of matrix and plasma jet 5
Equal angular β.Matrix 1 turns to original side after spraying a period of time again, keeps equal angular β, so circulation.Spraying process
In 1 number of revolutions B of matrix depend on coating structure tortuous number A, it is optimal be 5 times >=number of revolutions B=complications number A >=
1 time.
Preferably, the preparation condition of the heat-barrier coating ceramic layer of the tortuous column structure is:Spraying current is 2000-
2800 A, power are 100-140 kW, plasma working gas Ar, He, and flow is respectively 25 ~ 50 L/min, 50 ~ 75 L/
min。H2It can be added as the third plasma gas, flow is 0 ~ 10 L/min.1 temperature control of matrix is in 900-
Between 1100 DEG C, powder feeding rate 2-20 g/min, spray distance is 800-1400 mm, and deposit thickness is unlimited, generally 100-500
μm.After parameter area will cause ceramic layer powder to enter plasma jet 5, heating efficiency is limited and can not realize evaporation,
Vapour deposition can not be formed, therefore coating structure can be that fine and close sheet accumulates and can not form tortuous column.
It is of the invention compared with existing heat-barrier coating ceramic layer and technology of preparing, there is following remarkable advantage:
(1) existing heat-barrier coating ceramic layer, including prepared by EB-PVD and plasma spraying gas phase deposition technology
It is vertical pillar crystal structure, there are substantial amounts of down suction(Extend through matrix 1 vertically downward from coating surface), because vertically
The passage in gap is short, straight and hinder few, becomes heat and express passway that corrosive medium enters and spreads, reduce coating it is heat-insulated and
Resistance to high temperature corrosion ability.This invention removes down suction, high-temperature fuel gas can not be quickly directly heated to by down suction
Matrix 1, tortuous column structure thermal barrier coating form stop to entering for high-temperature fuel gas, can increase substantially heat insulation.
(2) the gravel dust of engine suction can form the corrosive deposit of melting at high temperature, they can be along between intergranular
Gap enters and diffusion.Clearance channel in tortuous column structure is longer, the corrosive deposit of melting spread wherein needs turn round and
Receive the viscous inhibition of longer channel wall.Corrosive deposit is difficult to enter and spreads, and the high temperature resistance for allowing for coating is rotten
Erosion ability improves.
(3) heat-barrier coating ceramic layer of existing vertical pillar crystal structure, 1 surface of matrix and plasma in spraying process
Vertical 90 ° are generally remained fixed between jet stream 5 or is pivoted.This preparation method is used between matrix 1 and spray gun
The coordinated signals of special angle and number of revolutions, then realize the preparation of tortuous column crystal.And curved structure is easy to adjust:I.e.
By adjusting the number of revolutions B of angle beta and matrix 1 between 1 surface of matrix and plasma jet 5, different complications can be obtained
Angle, the coating structure of tortuous number;Joined by adjusting the sprayings such as spray power, 1 temperature of matrix, powder feeding rate and spray distance
Number, can obtain different tortuous column crystal features(Such as thickness, density)Coating structure.
Brief description of the drawings
Fig. 1 is the structure diagram of tortuous column structure heat-barrier coating ceramic layer of the present invention.
Fig. 2 is the preparation method schematic diagram of tortuous column structure ceramic layer provided by the invention.
Fig. 3 is the adiabatic temperature curve map of the embodiment of the present invention(Curve 1 is comparative example;Curve 2 is the embodiment of the present invention
One;Curve 3 is the embodiment of the present invention two).
In Fig. 1 and Fig. 2,1 is matrix, and 2 be tack coat, and 3 be ceramic layer, and 4 be depositing coating, and 5 be plasma jet.
Embodiment
Embodiment one
The present embodiment selects high temperature alloy K417G as base material, its 3 cylindrical structure tortuous angle of ceramic layer is designed as 15 °, song
Folding number is designed as 2 times.Heat-barrier coating ceramic layer material selects yttria-stabilized zirconia(YSZ)Ceramic powders(Conglobation
Powder, -30+1 μm of particle diameter, component such as following table)
Component | ZrO2 | Y2O3 | HfO2 | Binding agent | Impurity |
Percentage by weight | Surplus | 7.5 | <2.5 | 1 | <0.1 |
Specific preparation process is as follows:
The first step, prepares matrix 1, specific as follows:
(7) surface of tack coat 2 is ground polishing on matrix 1, and alcohol ultrasonic cleaning, holding surface is clean, by portable
Formula surface roughness meter measures, Ra=0.37 ± 0.05 μm;
Second step, ceramic layer 3 is prepared on matrix 1, is comprised the following steps that:
(2) deposited ceramic layer 3, matrix 1 is fixed on the indoor workpiece motion s platform of vacuum;
(3) vacuum chamber is closed, vacuumizes, keeps 150 Pa of dynamic pressure < of vacuum chamber;
(4) pre-oxidation treatment:Realize that plasma flame flow purges before spraying, vacuum chamber leads to 2 L/min of oxygen, and matrix 1 is heated to temperature
930 ± 30 DEG C of degree, the time is 8 min.
(5) YSZ ceramic powders are sent into;
(6) in spraying process, it is necessary to keep 30 ° of angle between 1 surface of matrix of depositing coating 4 and plasma jet 5,
Matrix 1 turns to the opposite side of 5 axis of plasma jet after spraying 5min, is equally protected between 1 surface of matrix and plasma jet 5
Hold 30 ° of angle.Matrix 1 rotates after spraying 5min again, and former orientation is returned between 1 surface of matrix and plasma jet 5, keeps
30 ° of angle.Spray in overall process, the angular transformation between 4 surface of depositing coating and plasma jet 52 times.
Other preparation conditions are:Spraying current is 2600 A, and power is 125 kW, plasma working gas Ar, He,
Flow is respectively 35 L/min, 60 L/min.At 930 ± 30 DEG C, 10 g/min of powder feeding rate, spray distance is 1 temperature of matrix
950 mm。
3rd step, preparation terminate.
The thermal boundary that tortuous column structure has been made by vapour deposition of the YSZ ceramic powders on 1 surface of matrix for embodiment applies
Layer ceramic layer.Angle between tortuous 1 normal direction of column structure and matrix, i.e. tortuous angle are 15 ± 0.5 °, tortuous column
The changed number in structure growth direction, i.e., tortuous number is 2 times.The gross thickness of tortuous column structure ceramic layer 3 is 400 μ
m。
Embodiment two
The present embodiment selects high temperature alloy DZ40M as base material, its 3 cylindrical structure tortuous angle of ceramic layer is designed as 5 °, song
Folding number is designed as 2 times.Heat-barrier coating ceramic layer material selects yttria-stabilized zirconia(YSZ)Ceramic powders(Conglobation
Powder, -30+1 μm of particle diameter, component such as following table)
Component | ZrO2 | Y2O3 | HfO2 | Binding agent | Impurity |
Percentage by weight | Surplus | 7.5 | <2.5 | 1 | <0.1 |
Specific preparation process is as follows:
The first step, prepares matrix 1, specific as follows:
(1) surface of tack coat 2 is ground polishing on matrix 1, and alcohol ultrasonic cleaning, holding surface is clean, by portable
Formula surface roughness meter measures, Ra=0.1 ± 0.02 μm;
Second step, ceramic layer 3 is prepared on matrix 1, is comprised the following steps that:
(2) deposited ceramic layer 3, matrix 1 is fixed on the indoor workpiece motion s platform of vacuum;
(3) vacuum chamber is closed, vacuumizes, keeps the dynamic pressure of vacuum chamber to be less than or equal to 150 Pa;
(4) pre-oxidation treatment:Realize that plasma flame flow purges before spraying, vacuum chamber leads to 2 L/min of oxygen, and matrix 1 is heated to temperature
950 ± 30 DEG C of degree, the time is 10 min.
(5) YSZ ceramic powders are sent into;
(6) in spraying process, it is necessary to keep 45 ° of angle between 1 surface of matrix of depositing coating 4 and plasma jet 5,
The opposite side that matrix 1 after 4 min turns to 5 axis of plasma jet is sprayed, it is same between 1 surface of matrix and plasma jet 5
Keep 45 ° of angle.Matrix 1 rotates after spraying 4 min again, and former orientation is returned between 1 surface of matrix and plasma jet 5,
Keep 45 ° of angle.Spray in overall process, the angular transformation between 4 surface of depositing coating and plasma jet 52 times.
Other preparation conditions are:Spraying current is 2200 A, and power is 127 kW, plasma working gas Ar, He,
Flow is respectively 30 L/min, 60 L/min, H2It is added as the third plasma gas, flow is 5 L/min.
For 1 temperature of matrix at 950 ± 30 DEG C DEG C, 15 g/min of powder feeding rate, spray distance is 1000 mm.
3rd step, preparation terminate.
The thermal boundary that tortuous column structure has been made by vapour deposition of the YSZ ceramic powders on 1 surface of matrix for embodiment applies
Layer ceramic layer.Angle between tortuous 1 normal direction of column structure and matrix, i.e. tortuous angle=4.5 ± 0.5 °, tortuous column
The changed number in structure growth direction, i.e., tortuous number=2 time.The gross thickness of tortuous column structure ceramic layer 3 is 350 μ
m。
Comparative example:
Matrix 1 does not rotate in spraying process, its technological parameter is identical with embodiment 1.
Using adiabatic temperature test furnace come testing coating heat insulation, specific method is that sample coatings surface is heated to 1200
DEG C keep stablize, using thermocouple measurement and record sample back temperature.Fig. 3 is the adiabatic temperature curve map of the present embodiment, its
Middle curve 1 is comparative example, and structure is vertical pillar crystalline substance thermal barrier coating;Wherein curve 2 is embodiment one, it can be seen that works as sample
When coating surface is maintained at 1200 DEG C, the sample back temperature of embodiment one will be less than traditional vertical pillar crystalline substance thermal barrier coating,
About 80 DEG C or so, illustrate that the present embodiment heat insulation is substantially better than traditional vertical pillar crystalline substance thermal barrier coating, heat insulation has greatly
The raising of amplitude.Curve 3 is embodiment two.It can be seen that the heat insulation of embodiment two is equally better than traditional vertical pillar
Brilliant thermal barrier coating, about 20-30 DEG C, heat insulation is significantly improved.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute
Other changes of disclosed embodiment, are such as readily apparent that, such change should belong to for the professional person of this area
Within the scope of the claims in the present invention limit.
Claims (7)
1. a kind of heat-barrier coating ceramic layer, main structure contains matrix(1), tack coat(2), ceramic layer(3), its thermal barrier coating
Ceramic layer(3)Column structure with non-perpendicular growth, it is characterised in that column structure and matrix(1)Surface normal direction is in one
Determine the complications of angle, the complications column structure and matrix(1)Angle between surface normal direction is tortuous angle α, 60 ° >=α
0 ° of >, the tortuous changed number of the column structure direction of growth are tortuous number A, 10 times >=A >=1 time.
2. a kind of heat-barrier coating ceramic layer according to claim 1, it is characterised in that tortuous column structure and matrix(1)
Angle between surface normal direction is tortuous angle α, and optimal is 45 ° >=α >=10 °, and the tortuous column structure direction of growth occurs
The number of change is tortuous number A, and optimal is 5 times >=A >=1 time.
3. a kind of heat-barrier coating ceramic layer preparation method, the preparation method is plasma spraying gas phase deposition technology, such
Plasma spray gas phase deposition technology is to carry out plasma spraying, thermal barrier coating in the environment of vacuum chamber pressure is not higher than 150 Pa
Ceramic layer powder enters plasma jet(5)To realize and evaporate afterwards, the complex phase based on formation gas phase or gas phase, carries out coating deposition,
It is characterized in that, in matrix(1)On prepare ceramic layer(3)The step of include, deposited ceramic layer(3), by matrix(1)Fixed to true
On empty indoor workpiece motion s platform;Vacuum chamber is closed, is vacuumized, until the Pa of pressure≤150 of vacuum chamber;Pre-oxidation treatment:
Under the conditions of the Pa of the pressure of vacuum chamber≤150, oxygen flow 1-3 L/min, matrix(1)Temperature control at 900-1100 DEG C, wait from
Sub- flame stream purging 5-20 min;It is sent into ceramic layer powder;Being made has and matrix(1)The song of surface normal direction at an angle
Roll over the heat-barrier coating ceramic layer of column structure;Preparation terminates.
A kind of 4. heat-barrier coating ceramic layer preparation method according to claim 3, it is characterised in that:Prepare matrix(1), it is right
Matrix(1)Upper tack coat(2)Surface be ground, polish and clean, holding surface is clean, 2 μm of surface roughness Ra <.
A kind of 5. heat-barrier coating ceramic layer preparation method according to claim 3, it is characterised in that:The base in spraying process
Body(1)Need depositing coating(4)Surface and plasma jet(5)Between be kept at an angle β, 90 ° of > β >=0 °, spraying
Matrix after a period of time(1)Turn to other side, matrix(1)Surface and plasma jet(5)Between keep equal angular β,
Matrix after a period of time is sprayed again(1)Original side is turned to, equal angular β is kept, so circulates, the matrix in spraying process
(1)Number of revolutions B depends on the tortuous number A, 10 times >=number of revolutions B=complications number A >=1 time of coating structure.
A kind of 6. heat-barrier coating ceramic layer preparation method according to claim 5, it is characterised in that:The base in spraying process
Body(1)Need depositing coating(4)Surface and plasma jet(5)Between be kept at an angle β, it is optimal be 60 ° of > β >=
20 °, spray matrix after a period of time(1)Turn to other side, matrix(1)Surface and plasma jet(5)Between keep phase
Same angle beta, then spray matrix after a period of time(1)Original side is turned to, keeps equal angular β, so circulation, spraying process
In matrix(1)Number of revolutions B depends on the tortuous number A of coating structure, and optimal is 5 times >=number of revolutions B=complications number A
>=1 time.
A kind of 7. heat-barrier coating ceramic layer preparation method according to claim 3, it is characterised in that:Spraying current is
2000-2800 A, power are 100-140 kW, plasma working gas Ar, He, flow be respectively 25 ~ 50 L/min, 50 ~
75 L/min, H2It can be added as the third plasma gas, flow is 0 ~ 10 L/min, matrix(1)Temperature control
Between 900-1100 DEG C, powder feeding rate 2-20 g/min, spray distance is 800-1400 mm, and deposit thickness is 100-500 μm.
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CN109881138A (en) * | 2019-03-13 | 2019-06-14 | 罗远新 | A kind of protective coating construction technology |
CN114059001A (en) * | 2021-12-07 | 2022-02-18 | 西安工业大学 | Novel thermal barrier coating with high heat insulation performance and preparation process thereof |
CN114150253A (en) * | 2021-12-14 | 2022-03-08 | 湖南工程学院 | Erosion-resistant thermal barrier coating and preparation method and application thereof |
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CN114059001A (en) * | 2021-12-07 | 2022-02-18 | 西安工业大学 | Novel thermal barrier coating with high heat insulation performance and preparation process thereof |
CN114059001B (en) * | 2021-12-07 | 2023-12-22 | 西安工业大学 | High-heat-insulation thermal barrier coating and preparation process thereof |
CN114150253A (en) * | 2021-12-14 | 2022-03-08 | 湖南工程学院 | Erosion-resistant thermal barrier coating and preparation method and application thereof |
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Application publication date: 20180511 |