CN108285291A - A kind of thermal barrier coating nano ceramic powder and the preparation method and application thereof, thermal barrier coating - Google Patents
A kind of thermal barrier coating nano ceramic powder and the preparation method and application thereof, thermal barrier coating Download PDFInfo
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- CN108285291A CN108285291A CN201810227394.2A CN201810227394A CN108285291A CN 108285291 A CN108285291 A CN 108285291A CN 201810227394 A CN201810227394 A CN 201810227394A CN 108285291 A CN108285291 A CN 108285291A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
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- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/06—Acrylates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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Abstract
The present invention relates to a kind of thermal barrier coating nano ceramic powder and the preparation method and application thereof, thermal barrier coatings, belong to Material Field.Preparation method includes：Nanoscale 8YSZ and additive are configured to 8YSZ slurries, then mist projection granulating.Additive includes dispersant and bonding agent.Above-mentioned preparation method is simple and efficient, pollution-free, can improve the yield rate that powder stablizes compound probability and powder.The thermal barrier coating being prepared nano ceramic powder is reunited, and preferable, mobility is higher, while powder particle is smaller, size distribution is more uniform, sphericity is high, and performance is stablized.The thermal barrier coating for using it for production engine components enables to engine components to adapt to more severe high temperature, high pressure and deep-etching working environment.Thermal barrier coating containing above-mentioned thermal barrier coating nano ceramic powder has higher heat-proof quality and high-temperature oxidation resistance.
Description
Technical field
The present invention relates to Material Fields, and more particularly to a kind of thermal barrier coating nano ceramic powder and preparation method thereof with
Using, thermal barrier coating.
Background technology
As aero gas turbine engine develops to high flow capacity than, the direction of high thrust-weight ratio, high inlet temperature, combustion chamber
In fuel gas temperature and pressure be continuously improved, and existing high temperature alloy and cooling technology are difficult to meet needs, for this purpose, overdevelopment
Barrier coating technology is inevitable development trend.Thermal barrier coating (TBCs), also known as heat insulating coat, are a kind of ceramic protective layers, pass through
Component and high temperature on high temperature alloy hot-end component surface, are fired ceramic material deposits by coating processes (such as air plasma spraying)
Air bound from, using ceramics low heat conductivity, make to generate prodigious temperature drop between high-temperature fuel gas and metal parts, with reach protection heat
End pieces improve the combustion gas thermal efficiency and extend the purpose in heat engine service life.
By the research of decades, the temperature in use of high temperature alloy has been able to reach 1050 DEG C, in conjunction with directional solidification, list
Crystal technique and advanced air film cooling technology can make the high temperature that high temperature alloy bears 1400 DEG C, but inevitably reduce hair
The thermal efficiency of motivation.By to current result of study analysis, it is desirable to by cooling technology continue to break through, basis material into
It is very difficult that one step research and the improvement of engine structure make blade adapt to significantly temperature raising.But engine chamber
The continuous raising of middle service temperature and pressure is the inexorable trend of future development, and operating temperature is from last century the forties with several
It is even more to increase nearly 3 times to keep the climbing speed of 15 DEG C/year, gaseous-pressure, and the operating temperature of current hot-end component is in 1400-
1500 DEG C, fuel gas temperature has reached on 1600 DEG C, may quickly reach 1930 DEG C, so research thermal boundary Xu layer is for making hot junction portion
Ensure that the thermal efficiency is significant while part operating temperature improves.
The performance for preparing powder used in thermal barrier coating determines the performance of coating.Stabilized with yttrium oxide is widely used in Past 30 Years
Zirconium oxide (YSZ) is used as thermal barrier coating surface layer ceramic material.Its fusing point height (2680 DEG C), coefficient of thermal expansion are big (11 at 1200 DEG C
×10-6K-1), the low (2.2Wm of thermal conductivity-1·K-1), elasticity modulus low (40GPa), technical maturity and cheap.Traditional
Thermal barrier coating is generally prepared by micron-sized YSZ powder by plasma spray technology.But micron order YSZ powder is since particle is larger,
It will appear situations such as melting is incomplete, deposition efficiency is low, coating mechanical heterogeneity in thermal spray process.It is nano level
YSZ fine powders, although the comprehensive performance of thermal barrier coating can be promoted preferably, due to poor fluidity, easily absorption the shortcomings of, also without
Method is directly used in thermal spraying prepares coating.
Therefore it is based on above-mentioned analysis, need using nanoscale YSZ powder as raw material and seeks suitable prilling process preparation out-clique
It is poly- preferably, mobility it is higher, while powder particle is smaller, the more uniform thermal barrier coating hot spray powder of size distribution is with into one
Step promotes thermal barrier coating quality.
Invention content
One of the objects of the present invention is to provide a kind of preparation method of thermal barrier coating nano ceramic powder, the preparation sides
Method is simple and efficient, pollution-free, can improve the yield rate that powder stablizes compound probability and powder.
The second object of the present invention is to provide a kind of thermal barrier coating being prepared by above-mentioned preparation method and is made pottery with nanometer
Porcelain powder, thermal barrier coating nano ceramic powder is reunited, and preferable, mobility is higher, while powder particle is smaller, size distribution
It is more uniform, sphericity is high, performance stablize.
The third object of the present invention is to provide a kind of application of above-mentioned thermal barrier coating nano ceramic powder, such as can incite somebody to action
It is used to produce the thermal barrier coating of engine components, and engine components is enabled to adapt to more severe high temperature, high pressure and strong
Anticorrosion work environment.
The fourth object of the present invention is to provide a kind of thermal barrier coating containing above-mentioned thermal barrier coating nano ceramic powder,
With higher heat-proof quality and high-temperature oxidation resistance.
The present invention solves its technical problem using following technical scheme to realize：
The present invention proposes a kind of preparation method of thermal barrier coating nano ceramic powder, includes the following steps：By nanoscale
8YSZ is configured to 8YSZ slurries with additive, then mist projection granulating.
Additive includes dispersant and bonding agent.
Preferably, dispersant includes polyacrylic acid, and bonding agent includes polyvinylpyrrolidone.
Preferably, 8YSZ is the 8YSZ powder that granularity is 20-40nm.
Preferably, the mass ratio of dispersant, bonding agent and 8YSZ are 1-10:4-14:100.
The present invention also proposes a kind of thermal barrier coating nano ceramic powder, is prepared by above-mentioned preparation method.
The present invention also proposes a kind of application of above-mentioned thermal barrier coating nano ceramic powder, such as can use it for production hair
The thermal barrier coating of motivation component.
The present invention also proposes a kind of thermal barrier coating, which contains above-mentioned thermal barrier coating nano ceramic powder.
Thermal barrier coating nano ceramic powder that present pre-ferred embodiments provide and the preparation method and application thereof, thermal boundary apply
Layer advantageous effect include：
Using nanoscale 8YSZ powder as raw material in the embodiment of the present invention, thermal barrier coating is prepared with receiving using atomizing granulating technology
Rice ceramic powders.The use of dispersant and bonding agent can make powder reunion and dispersion effect preferable, and slurry viscosity is moderate.By
It cannot be directly used to spray in nanometer powder, mobility is very poor to block spray gun, and is easy to aoxidize in spraying process, easily fire
It burns, the requirement of application cannot be met.In the case where not changing powder nanometer structure, nanometer powder is reunited to be suitble to thermal spraying
Micron powder, solve ceramic powders poor fluidity, be difficult to the difficult point sprayed.In addition with the conventional micron powder of identical component
It compares, the mechanical property and wear and corrosion behavior of nanometer 8YSZ powder are obtained for raising by a relatively large margin, have comprehensive well
Performance and use value are closed, new approach and scientific basis are provided for the preparation and application of high-performance nano coating.
The preparation method for the thermal barrier coating nano ceramic powder that present pre-ferred embodiments provide is simple and efficient, no dirt
Dye, can improve the yield rate that powder stablizes compound probability and powder.Thermal barrier coating obtained is reunited with nano ceramic powder
Preferably, mobility is higher, while powder particle is smaller, size distribution is more uniform, sphericity is high, and performance is stablized.It uses it for giving birth to
The thermal barrier coating for producing engine components enables to engine components to adapt to more severe high temperature, high pressure and deep-etching work
Environment.Thermal barrier coating containing above-mentioned thermal barrier coating nano ceramic powder has higher heat-proof quality and high-temperature oxidation resistant
Performance.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described.
Fig. 1 is the TEM figures of original 8YSZ nanometer powders in embodiment 1 in test example；
Fig. 2 is the SEM figures of original 8YSZ nanometer powders in embodiment 1 in test example；
Fig. 3 is the nanometer reunion powder after the original 8YSZ nanometer powders and mist projection granulating that in test example prepared by embodiment 1
The XRD diagram at end；
Fig. 4 is the grain size analysis diagram for the nano ceramics reunion powder that in test example prepared by embodiment 1；
Fig. 5 is the SEM shape appearance figures for the nano ceramics reunion powder that in test example prepared by embodiment 1；
Fig. 6 is the SEM shape appearance figures for the nano ceramics reunion powder that in test example prepared by embodiment 2；
Fig. 7 is the SEM shape appearance figures for the nano ceramics reunion powder that in test example prepared by embodiment 3.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Below to thermal barrier coating nano ceramic powder of the embodiment of the present invention and the preparation method and application thereof, thermal barrier coating
It is specifically described.
The preparation method of thermal barrier coating nano ceramic powder provided in an embodiment of the present invention includes the following steps：By 8YSZ
8YSZ slurries are configured to additive, then mist projection granulating.
Preferably, the 8YSZ in the embodiment of the present invention uses nanoscale YSZ powder.Nano level YSZ powder is compared with micron order
YSZ powder can effectively improve the preparation efficiency of thermal barrier coating and the uniformity of coating.In addition, compared with conventional coating, receive
Coating prepared by rice flour body makes it with higher hardness, fracture toughness, wearability and resistance to due to the particularity of itself
Corrosivity, and then promote coating quality and service life.
Optionally, the YSZ powder in the embodiment of the present invention is preferably the 8YSZ powder that granularity is 20-40nm.The grain
It spends under range, the more conducively preparation of thermal barrier coating, granularity can slightly influence the quality of the thermal barrier coating finally prepared, also, powder excessively
The powder size prepared after spray drying when last granularity is more than 40nm also can be bigger than normal, does not meet requirement.
Additive may include dispersant and bonding agent.Optionally, dispersant preferably includes polyacrylic acid, bonding agent
Preferably include polyvinylpyrrolidone.Why dispersant is preferably polyacrylic acid, and reason is：Polyacrylic acid is relatively cheap
And dispersion effect is best.Why bonding agent is preferably polyvinylpyrrolidone, and reason is：Partly other binders are made
The agglomerating effect of standby powder is not so good as polyvinylpyrrolidone, other bonding agents of part are more expensive compared with polyvinylpyrrolidone.
Preferably, the mass ratio of above-mentioned dispersant, bonding agent and 8YSZ can be 1-10:4-14:100.The matter of dispersant
Amount can cause dispersion effect bad than range less than the range；It is excessive higher than the range slurry viscosity, it is unfavorable for subsequently preparing.It is viscous
Connecing the quality of agent can cause agglomerating effect undesirable than range less than the range, excessive higher than the range slurry viscosity to carry out
Spray drying.
Preferably, before being mixed with additive, 8YSZ is first mixed with solvent, obtains the first slurry.Wherein, solvent includes water or nothing
Water-alcohol, preferably deionized water.Optionally, the mass ratio of solvent and 8YSZ are preferably (7：3)-(5.5:4.5).In the section
The powder of required quality can be prepared in range.The powder size prepared less than ratio spray drying is bigger than normal, is higher than
Then molding powder agglomerating effect is poor for the ratio.
Further, the preparation of 8YSZ slurries includes the following steps in the embodiment of the present invention：By the first slurry and dispersant
And ball-milling medium mixing, ball milling 2-4h obtain the second slurry；Second slurry is mixed with bonding agent, continues ball milling 2-4h, obtains
8YSZ slurries.
Why dispersant and bonding agent are mixed in different time sections with 8YSZ, reason is：Dispersant and
Binder can generate competitive adsorption in powder particle surface, and so that viscosity is substantially increased slurry in a short time.Therefore in order to
Such case is avoided, dispersant is first added, again to adding binder in slurry after equal distribution is uniform.Additive can be improved in this way
Service efficiency, and preferably control the viscosity of slurry.In other words, the main purpose of first time ball milling is to realize 8YSZ powder
Uniform and stable dispersion, it is in the slurry of 8YSZ powder and right that the purpose of second of ball milling mainly realizes that binder is dispersed in
Powder plays certain agglomeration.
Optionally, ball-milling medium is preferably zirconia ball in the embodiment of the present invention, main because powder is 8YSZ powder
Ingredient is zirconium oxide, therefore selective oxidation zirconium ball can prevent from polluting.
Preferably, ball-milling medium includes the zirconia ball of different-grain diameter simultaneously.Nanometer powder is configured to slurry and is used
Different size ball milling ball composite ball-millings, not only can be improved the uniformity of nanometer powder distribution, but also can also effectively avoid dispersant
There is competitive adsorption in nano grain surface with binder.
Optionally, above-mentioned ball-milling medium can be respectively simultaneously 4-8mm, 8-12mm and 18- including grain size
The zirconia ball of 22mm.The quantity of the zirconia ball of three kinds of grain sizes can be followed successively by 8:4:1, it also can be according to actual use situation
It is adjusted.
Preferably, the mass ratio of ball-milling medium and 8YSZ are (1:1)-(3:1), such as can be 2:1.The excessively high meeting of ratio of grinding media to material
Cause grinding efficiency low, ratio of grinding media to material is too low to cause ball milling uneven insufficient.
The second slurry of above-mentioned preparation and to prepare rotational speed of ball-mill in the mechanical milling processes of 8YSZ slurries can be 200-400rpm.
It generates heat when higher than 400rpm ball millings serious, the performance of slurry can be influenced；It is bad less than 200rpm dispersion effects.
8YSZ slurries are subjected to mist projection granulating, it is advantageous that the fast of heat and quality is realized in time that can be very short
Speed transfer, preparation efficiency are high；Preparation equipment is simple, preparation temperature is low simultaneously, convenient for producing in enormous quantities, and accurately controls powder
Material component.Its principle is as follows：Feed liquid is separated into tiny droplet using atomizer, and is evaporated rapidly in heated drying medium
Solvent forms power-product, generally comprises four-stage：1 feed liquid is atomized；2 mist groups mix with heated drying media contact；3 droplets
Evaporation drying；4 dry products are detached with dried medium.In subtle suspension atomization to hothouse, by stream of hot air or inner wall
Heating.Quick heat and mass transfer occur during drying and the evaporation of liquid to finally obtain dry particle.It is dry
Particle afterwards is broadly divided into Types Below：Uniform spherome, elongate globule, pancake shape, annular shape, needle-shaped or hollow bead, and
By the pattern and granularity that can effectively control the adjusting of drying process with atomizing parameter powder after granulation.
With can refer to, the process conditions of mist projection granulating for example may include in the embodiment of the present invention：Feeding speed is 40-
100ml/min, inlet temperature is 260-290 DEG C, outlet temperature is 90-120 DEG C, cavity pressure 1-2bar, atomizer are adjusted
For 3-6m3/h。
Wherein, feeding speed mainly controls the granularity of powder after spray drying, excessive or too low can all cause
Size distribution is uneven or granular size differs greatly.Import and export temperature mainly influences the degree of drying of powder, is less than the range
Then dry insufficient, higher than the range, then sphericity is bad, and hollow is more.Pressure and atomizer are adjusted and temperature adjustment effect class
Seemingly, the powder sphericity for being spray-dried preparation in the range is preferable, even particle size distribution；It cannot be done beyond the range
The dry abundant and good reunion powder of pattern.
From the above, the present invention is using nanoscale 8YSZ powder as raw material, the technique being combined using ball milling and mist projection granulating,
By way of ball milling, nanometer powder is uniformly distributed in the slurry, and forms stable nano-dispersed powder.Nanometer powder
It cannot be directly used to spray, mobility is very poor to block spray gun, and is easy to aoxidize in spraying process, easily burn, Bu Nengman
The requirement applied enough.In the case where not changing powder nanometer structure, nanometer powder is reunited to be suitble to the powder and micron of thermal spraying
End solves ceramic powders poor fluidity, is difficult to the difficult point sprayed.In addition it compared with the conventional micron powder of identical component, receives
Rice 8YSZ powder mechanical property and wear and corrosion behavior be obtained for raising by a relatively large margin, have good comprehensive performance and
Use value provides new approach and scientific basis for the preparation and application of high-performance nano coating.
The thermal barrier coating being prepared through above-mentioned preparation method nano ceramic powder is reunited, and preferable, mobility is higher, together
When powder particle is smaller, size distribution is more uniform, sphericity is high, performance is steady.
The embodiment of the present invention additionally provides a kind of application of above-mentioned thermal barrier coating nano ceramic powder, such as can be by it
Thermal barrier coating for producing engine components, especially commercial and military turbine engine components, such as combustion chamber, high-pressure turbine
The thermal barrier coating of machine blade, nozzle, combustion chamber, heat screen and burner inner liner etc. enables to turbine combustion chamber adaptation more to dislike
Bad high temperature, high pressure, deep-etching working environment.
In addition, the embodiment of the present invention additionally provides a kind of thermal barrier coating, which contains above-mentioned thermal barrier coating with receiving
Rice ceramic powders, and there is higher heat-proof quality and high-temperature oxidation resistance.
The feature and performance of the present invention are described in further detail with reference to embodiments.
Embodiment 1
With deionized water it is 6.5 with mass ratio by the 8YSZ powder of different-grain diameter that granularity is 20-40nm:After 3.5 mixing
It is added in QM-3SP4 planetary ball mills, obtains the first slurry.
First slurry is mixed with polyacrylic acid and ball-milling medium, with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Planetary ball mill, for 400rpm ball milling 3h, obtains the second slurry with rotating speed.Wherein, ball-milling medium is simultaneously 8 including quantity ratio:4:
1 grain size is respectively the zirconia ball of 6mm, 10mm and 20mm.The mass ratio of polyacrylic acid and 8YSZ powder is 6:100, ball
The mass ratio of grinding media and 8YSZ powder is 2:1.
Second slurry is mixed with polyvinylpyrrolidone, it is planetary with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Ball mill, for 400rpm ball milling 3h, obtains third slurry with rotating speed.The mass ratio of polyvinylpyrrolidone and 8YSZ powder is 10:
100。
In MOBILE MINORTMResearch and development are spray-dried third slurry with following process conditions in spray dryer
It is granulated.Process conditions：Feeding speed is 60ml/min, and inlet temperature is 280 DEG C, outlet temperature is 120 DEG C, cavity pressure is
1.4bar, atomizer are adjusted to 4m3/h。
Nano ceramics reunion powder obtained is in spherical, and mobility is excellent, is used directly for thermal spraying and prepares thermal barrier coating.
Embodiment 2
With deionized water it is 6 with mass ratio by 8YSZ powder that granularity is 30nm:It is planetary that QM-3SP4 is added after 4 mixing
In ball mill, the first slurry is obtained.
First slurry is mixed with polyacrylic acid and ball-milling medium, with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Planetary ball mill, for 400rpm ball milling 3h, obtains the second slurry with rotating speed.Wherein, ball-milling medium is simultaneously 8 including quantity ratio:4:
1 grain size is respectively the zirconia ball of 6mm, 10mm and 20mm.The mass ratio of polyacrylic acid and 8YSZ powder is 6:100, ball
The mass ratio of grinding media and 8YSZ powder is 2:1.
Second slurry is mixed with polyvinylpyrrolidone, it is planetary with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Ball mill, for 400rpm ball milling 4h, obtains third slurry with rotating speed.The mass ratio of polyvinylpyrrolidone and 8YSZ powder is 10:
100。
In MOBILE MINORTMResearch and development are spray-dried third slurry with following process conditions in spray dryer
It is granulated.Process conditions：Feeding speed is 70ml/min, and inlet temperature is 280 DEG C, outlet temperature is 120 DEG C, cavity pressure is
1.4bar, atomizer are adjusted to 4.8m3/h。
Nano ceramics reunion powder obtained is in spherical, and mobility is excellent, is used directly for thermal spraying and prepares thermal barrier coating.
Embodiment 3
With deionized water it is 6.5 with mass ratio by 8YSZ powder that granularity is 30nm:QM-3SP4 rows are added after 3.5 mixing
In planetary ball mill, the first slurry is obtained.
First slurry is mixed with polyacrylic acid and ball-milling medium, with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Planetary ball mill, for 400rpm ball milling 3h, obtains the second slurry with rotating speed.Wherein, ball-milling medium is simultaneously 8 including quantity ratio:4:
1 grain size is respectively the zirconia ball of 6mm, 10mm and 20mm.The mass ratio of polyacrylic acid and 8YSZ powder is 6:100, ball
The mass ratio of grinding media and 8YSZ powder is 2:1.
Second slurry is mixed with polyvinylpyrrolidone, it is planetary with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Ball mill, for 400rpm ball milling 3h, obtains third slurry with rotating speed.The mass ratio of polyvinylpyrrolidone and 8YSZ powder is 12:
100。
In MOBILE MINORTMResearch and development are spray-dried third slurry with following process conditions in spray dryer
It is granulated.Process conditions：Feeding speed is 60ml/min, and inlet temperature is 280 DEG C, outlet temperature is 120 DEG C, cavity pressure is
1.4bar, atomizer are adjusted to 4.4m3/h。
Nano ceramics reunion powder obtained is in spherical, and mobility is excellent, is used directly for thermal spraying and prepares thermal barrier coating.
Embodiment 4
With deionized water it is 6.5 with mass ratio by 8YSZ powder that granularity is 30nm:QM-3SP4 rows are added after 3.5 mixing
In planetary ball mill, the first slurry is obtained.
First slurry is mixed with polyacrylic acid and ball-milling medium, with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Planetary ball mill, for 400rpm ball milling 3h, obtains the second slurry with rotating speed.Wherein, ball-milling medium is simultaneously 8 including quantity ratio:4:
1 grain size is respectively the zirconia ball of 6mm, 10mm and 20mm.The mass ratio of polyacrylic acid and 8YSZ powder is 6:100, ball
The mass ratio of grinding media and 8YSZ powder is 2:1.
Second slurry is mixed with polyvinylpyrrolidone, it is planetary with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Ball mill, for 400rpm ball milling 3h, obtains third slurry with rotating speed.The mass ratio of polyvinylpyrrolidone and 8YSZ powder is 9:
100。
In MOBILE MINORTMResearch and development are spray-dried third slurry with following process conditions in spray dryer
It is granulated.Process conditions：Feeding speed is 60ml/min, and inlet temperature is 280 DEG C, outlet temperature is 120 DEG C, cavity pressure is
1.4bar, atomizer are adjusted to 3.6m3/h。
Nano ceramics reunion powder obtained is in spherical, and mobility is excellent, is used directly for thermal spraying and prepares thermal barrier coating.
Embodiment 5
With deionized water it is 7.5 with mass ratio by 8YSZ powder that granularity is 30nm:QM-3SP4 rows are added after 2.5 mixing
In planetary ball mill, the first slurry is obtained.
First slurry is mixed with polyacrylic acid and ball-milling medium, with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Planetary ball mill, for 400rpm ball milling 2h, obtains the second slurry with rotating speed.Wherein, ball-milling medium is simultaneously 8 including quantity ratio:4:
1 grain size is respectively the zirconia ball of 6mm, 10mm and 20mm.The mass ratio of polyacrylic acid and 8YSZ powder is 6:100, ball
The mass ratio of grinding media and 8YSZ powder is 2:1.
Second slurry is mixed with polyvinylpyrrolidone, it is planetary with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Ball mill, for 400rpm ball milling 4h, obtains third slurry with rotating speed.The mass ratio of polyvinylpyrrolidone and 8YSZ powder is 7:
100。
In MOBILE MINORTMResearch and development are spray-dried third slurry with following process conditions in spray dryer
It is granulated.Process conditions：Feeding speed is 60ml/min, and inlet temperature is 280 DEG C, outlet temperature is 120 DEG C, cavity pressure is
1.4bar, atomizer are adjusted to 3.6m3/h。
Nano ceramics reunion powder obtained is in spherical, and mobility is excellent, is used directly for thermal spraying and prepares thermal barrier coating.
Embodiment 6
With alcohol it is 3 with mass ratio by 8YSZ powder that granularity is 20nm:7 mixing, obtain the first slurry.
First slurry is mixed with polyacrylic acid and ball-milling medium, with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Planetary ball mill, for 200rpm ball milling 4h, obtains the second slurry with rotating speed.Wherein, ball-milling medium is simultaneously 8 including quantity ratio:4:
1 grain size is respectively the zirconia ball of 4mm, 8mm and 18mm.The mass ratio of polyacrylic acid and 8YSZ powder is 1:100, ball milling
The mass ratio of medium and 8YSZ powder is 1:1.
Second slurry is mixed with polyvinylpyrrolidone, it is planetary with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Ball mill, for 200rpm ball milling 4h, obtains third slurry with rotating speed.The mass ratio of polyvinylpyrrolidone and 8YSZ powder is 4:
100。
Spray drying granulation is carried out to third slurry with following process conditions.Process conditions：Feeding speed is 40ml/min,
Inlet temperature is 260 DEG C, outlet temperature is 90 DEG C, cavity pressure 1bar, atomizer are adjusted to 3m3/h。
Nano ceramics reunion powder obtained is in spherical, and mobility is excellent, is used directly for thermal spraying and prepares thermal barrier coating.
Embodiment 7
With deionized water it is 4.5 with mass ratio by 8YSZ powder that granularity is 40nm:5.5 mixing, obtain the first slurry.
First slurry is mixed with polyacrylic acid and ball-milling medium, with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Planetary ball mill, for 400rpm ball milling 2h, obtains the second slurry with rotating speed.Wherein, ball-milling medium is simultaneously 8 including quantity ratio:4:
1 grain size is respectively the zirconia ball of 8mm, 12mm and 22mm.The mass ratio of polyacrylic acid and 8YSZ powder is 10:100, ball
The mass ratio of grinding media and 8YSZ powder is 3:1.
Second slurry is mixed with polyvinylpyrrolidone, it is planetary with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Ball mill, for 400rpm ball milling 2h, obtains third slurry with rotating speed.The mass ratio of polyvinylpyrrolidone and 8YSZ powder is 14:
100。
Spray drying granulation is carried out to third slurry with following process conditions.Process conditions：Feeding speed is 100ml/
Min, inlet temperature is 290 DEG C, outlet temperature is 120 DEG C, cavity pressure 2bar, atomizer are adjusted to 6m3/h。
Nano ceramics reunion powder obtained is in spherical, and mobility is excellent, is used directly for thermal spraying and prepares thermal barrier coating.
Embodiment 8
With deionized water it is 4 with mass ratio by 8YSZ powder that granularity is 35m:6 mixing, obtain the first slurry.
First slurry is mixed with polyacrylic acid and ball-milling medium, with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Planetary ball mill, for 300rpm ball milling 3h, obtains the second slurry with rotating speed.Wherein, ball-milling medium is simultaneously 8 including quantity ratio:4:
1 grain size is respectively the zirconia ball of 6mm, 10mm and 20mm.The mass ratio of polyacrylic acid and 8YSZ powder is 5:100, ball
The mass ratio of grinding media and 8YSZ powder is 2:1.
Second slurry is mixed with polyvinylpyrrolidone, it is planetary with the QM-3SP4 of Nanjing Nanda Instrument Co., Ltd.
Ball mill, for 300rpm ball milling 3h, obtains third slurry with rotating speed.The mass ratio of polyvinylpyrrolidone and 8YSZ powder is 9:
100。
Spray drying granulation is carried out to third slurry with following process conditions.Process conditions：Feeding speed is 70ml/min,
Inlet temperature is 275 DEG C, outlet temperature is 105 DEG C, cavity pressure 1.5bar, atomizer are adjusted to 4.5m3/h。
Nano ceramics reunion powder obtained is in spherical, and mobility is excellent, is used directly for thermal spraying and prepares thermal barrier coating.
Embodiment 9
The present embodiment provides a kind of applications of thermal barrier coating nano ceramic powder, that is, use it for production turbogenerator
In nozzle thermal barrier coating, nano ceramic powder can be used by above-described embodiment 1-8 any embodiments prepare gained thermal boundary
Coating nano ceramic powder.
Embodiment 10
The present embodiment provides a kind of applications of thermal barrier coating nano ceramic powder, that is, use it for production turbogenerator
In pressure cooker turbine blade thermal barrier coating, nano ceramic powder can be used by above-described embodiment 1-8 any embodiments prepare
The thermal barrier coating nano ceramic powder of gained.
Embodiment 11
The present embodiment provides a kind of applications of thermal barrier coating nano ceramic powder, that is, use it for production turbogenerator
In burner inner liner thermal barrier coating, nano ceramic powder can be used by above-described embodiment 1-8 any embodiments prepare gained heat
Barrier coating nano ceramic powder.
Embodiment 12
The present embodiment provides a kind of thermal barrier coating, which contains nano ceramic powder, and nano ceramic powder can be adopted
With the thermal barrier coating nano ceramic powder for preparing gained by above-described embodiment 1-8 any embodiments.
Test example
It repeats to implement above-described embodiment 1-8, obtains enough thermal barrier coating nano ceramic powders.
By taking embodiment 1 as an example, when preparing 8YSZ nanometers of reunion ceramic powders, original 8YSZ powder sampling is carried out respectively saturating
The microscopic appearance and original particle size of electron microscope and scanning electron microscope observation powder particle are penetrated, acquired results are respectively as schemed
Shown in 1 and Fig. 2；X-ray diffractometer (XRD) is respectively adopted to nanometer reunion powder after original 8YSZ powder, spray drying and analyzes phase group
At and its structure, the results are shown in Figure 3, in figure A be starting powder, B be spray drying after powder；It is analyzed using laser particle analyzer
The particle diameter distribution of nano ceramics reunion powder, acquired results are as shown in Figure 4；Spray drying nano ceramics reunion powder is sampled and used
Scanning electron microscope analyzes nano ceramics reunion powder pattern, and acquired results are as shown in Figure 5.
The nano ceramics reunion powder pattern prepared to embodiment 2 and embodiment 3 using scanning electron microscope is carried out
Analysis, result is respectively as shown in Fig. 6 and Fig. 7.
It can be obtained by Fig. 1, the granularity of original 8YSZ nanometer powders is less than 50nm, and substantially in 20- in embodiment 1
40nm。
The microscopic appearance of original 8YSZ nanometer powders as seen from Figure 2, compared with Fig. 5-7, the finished product after preparation is more former
Beginning 8YSZ nanometer powder improves the uniformity of nanometer powder distribution.
The phase for being spray-dried front and back powder as seen from Figure 3 becomes without apparent, it was demonstrated that the front and back starting powder of spray drying
Physical property does not change.
It can show that after being spray-dried 80% powder size is distributed between 6.25-20.51 μm by Fig. 4.
In conclusion the preparation method of thermal barrier coating provided in an embodiment of the present invention nano ceramic powder is simple and efficient,
It is pollution-free, the yield rate that powder stablizes compound probability and powder can be improved.Thermal barrier coating nano ceramic powder obtained
Reuniting, preferable, mobility is higher, while powder particle is smaller, size distribution is more uniform, sphericity is high, and performance is stablized.It is used
In the thermal barrier coating of production engine components, engine components is enabled to adapt to more severe high temperature, high pressure and deep-etching
Working environment.Thermal barrier coating containing above-mentioned thermal barrier coating nano ceramic powder has higher heat-proof quality and high temperature anti-
Oxidation susceptibility.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.The reality of the present invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of thermal barrier coating nano ceramic powder, which is characterized in that include the following steps：By nanoscale
8YSZ is configured to 8YSZ slurries with additive, then mist projection granulating；
The additive includes dispersant and bonding agent；
Preferably, the dispersant includes polyacrylic acid, and the bonding agent includes polyvinylpyrrolidone；
Preferably, the 8YSZ is the 8YSZ powder that granularity is 20-40nm；
Preferably, the mass ratio of the dispersant, the bonding agent and the 8YSZ are 1-10:4-14:100.
2. preparation method according to claim 1, which is characterized in that before being mixed with the additive, the 8YSZ first with
Solvent mixes, and obtains the first slurry；
The solvent includes water or absolute alcohol；
Preferably, the mass ratio of the solvent and the 8YSZ are (7：3)-(5.5:4.5).
3. preparation method according to claim 2, which is characterized in that the preparation of the 8YSZ slurries includes the following steps：
First slurry is mixed with the dispersant and ball-milling medium, ball milling 2-4h obtains the second slurry；By second slurry
It is mixed with the bonding agent, continues ball milling 2-4h, obtain the 8YSZ slurries.
4. preparation method according to claim 3, which is characterized in that the ball-milling medium is zirconia ball；
Preferably, the ball-milling medium includes the zirconia ball of different-grain diameter simultaneously；
Preferably, the mass ratio of the ball-milling medium and the 8YSZ are (1:1)-(3:1).
5. preparation method according to claim 4, which is characterized in that the ball-milling medium is respectively simultaneously 4- including grain size
The zirconia ball of 8mm, 8-12mm and 18-22mm.
6. preparation method according to claim 3, which is characterized in that prepare second slurry and prepare the 8YSZ
Rotational speed of ball-mill is 200-400rpm in the mechanical milling process of slurry.
7. preparation method according to claim 1, which is characterized in that the process conditions of mist projection granulating include：Feeding speed
For 40-100ml/min, inlet temperature is 260-290 DEG C, outlet temperature is 90-120 DEG C, cavity pressure 1-2bar, atomizer
It is adjusted to 3-6m3/h。
8. a kind of thermal barrier coating nano ceramic powder, which is characterized in that the thermal barrier coating is with nano ceramic powder by such as weighing
Profit requires any preparation methods of 1-7 to be prepared.
9. the application of thermal barrier coating nano ceramic powder as claimed in claim 8, which is characterized in that the thermal barrier coating is used
Nano ceramic powder is used to produce the thermal barrier coating of engine components.
10. a kind of thermal barrier coating, which is characterized in that the thermal barrier coating contains thermal barrier coating as claimed in claim 8 with receiving
Rice ceramic powders.
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| CN109369158A (en) * | 2018-11-15 | 2019-02-22 | 广东省新材料研究所 | A kind of insulating heat-conductive composite ceramic powder and the preparation method and application thereof, insulating heat-conductive coating |
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| CN109534394A (en) * | 2018-12-22 | 2019-03-29 | 北京金轮坤天特种机械有限公司 | One kind being based on target coating phase structure and short route plasma physical vapor deposit thermal barrier coatings dusty spray preparation method |
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| CN110571466B (en) * | 2019-08-14 | 2021-06-22 | 广东省新材料研究所 | Medium-low temperature solid oxide fuel cell electrolyte coating and preparation method thereof |
| CN110668812A (en) * | 2019-09-18 | 2020-01-10 | 苏州炻原新材料科技有限公司 | Nano zirconium oxide spraying powder and preparation method thereof |
| CN110668813A (en) * | 2019-09-18 | 2020-01-10 | 苏州炻原新材料科技有限公司 | Preparation method of nano zirconia granulated powder |
| CN110668812B (en) * | 2019-09-18 | 2021-10-26 | 苏州炻原新材料科技有限公司 | Nano zirconium oxide spraying powder and preparation method thereof |
| CN112358293A (en) * | 2020-11-26 | 2021-02-12 | 广东省科学院新材料研究所 | Powder for thermal barrier coating, preparation method and application thereof, and composite material with thermal barrier coating |
| CN112358293B (en) * | 2020-11-26 | 2022-08-26 | 广东省科学院新材料研究所 | Powder for thermal barrier coating, preparation method and application thereof, and composite material with thermal barrier coating |
| CN112708301A (en) * | 2021-01-06 | 2021-04-27 | 闽南理工学院 | Preparation method of nano 8YSZ aqueous phase suspension with stable dispersion |
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Address after: 510000 363 Changxin Road, Tianhe District, Guangzhou, Guangdong. Applicant after: Institute of new materials, Guangdong Academy of Sciences Address before: 510000 363 Changxin Road, Tianhe District, Guangzhou, Guangdong. Applicant before: GUANGDONG INSTITUTE OF NEW MATERIALS |
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