CN101070246A - Ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide, preparing process, its material and production method - Google Patents
Ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide, preparing process, its material and production method Download PDFInfo
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Abstract
This invention relates to preparation craft and stuff of a yttria stable zirconia ceramics thermal barrier coating. This thermal barrier coating possess composite structure of new type nanometer particle and honeycomb network, has high anchoring strength, lower thermal conductivity and so on merit. The phase structure of powdered material is unformed amorphous, possess high bulk density, good liquidity, adaptable to hot spraying. This new style powdered material and coating in particularly fit for repairing of traditional ceramics thermal barrier coating and nanometer structure thermal barrier coating, and could used as high performance thermal barrier coating alone.
Description
Technical field
The present invention relates to the amorphous yttria-stabilized zirconia ceramic spherical powdered material of a kind of ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide and employing thereof, and the process for producing method of the plasma spraying processing method of this novel thermal barrier coating and amorphous yttria-stabilized zirconia ceramic spherical powdered material.This kind novel powder material and coating are particularly suitable for the reparation of traditional ceramics thermal barrier coating and nanostructure thermal barrier coating, and can use as the high-performance thermal barrier coating separately.
Background technology
In order to reduce the fuel consumption of space flight and aviation engine, improve thrust/weight ratio, adopt various functional coatings to improve gas engine working temperature, use properties and work-ing life in a large number.Rationally use thermal barrier coating exactly, can increase substantially the working temperature of engine.The zirconia coating material of stabilized with yttrium oxide is broad research, the desirable heat barrier coat material that generally adopts now.It has excellent comprehensive performances such as high temperature under the lower thermal conductivity, high thermal expansion coefficient, 1400 ℃ is stable, anticorrosive mutually, successfully be applied to rocket, gas engine combustion chamber, positions such as rocket, gas engine jet pipe and engine turbine machine blade.In addition, Y
20
3Stable ZrO
2Because stablizer and Zr
4+Valency do not wait, at Zr0
2In produced the oxygen room to keep the crystalline electric neutrality.Because the generation in oxygen room makes material have the characteristic of high transmission oxonium ion, high-temperature fuel cell solid electrolyte/electrode coating, the oxygen sensitive sensor ionogen/electrode coating of using this performance preparation have also had widely to be used, studies.
The zirconia ceramics thermal barrier coating of stabilized with yttrium oxide develops into today, adopt the yttria-stabilized zirconia nano-structured coating of thermal plasma spraying method preparation all to be significantly improved, thereby become the focus of current research at aspects such as mechanical property, thermal property, oxygen ion conductor performances.Preparation method for yttria-stabilized zirconia nanostructure thermal barrier coating in document of having published and patent has two kinds: mentioned in the patent application document of application number 200510019464.8 that a kind of is the thermal barrier coating of raw material by the final preparation of the transformation of thermal plasma spraying equipment feeding part is had nanostructure with the liquid phase.Adopt this method to have numerous defectives such as sedimentation effect is low, anchoring strength of coating is little, coat-thickness is little.Simultaneously, this method need be transformed equipment, and scrap build has high input, and is difficult for realizing.The further research that Lin Feng etc. carry out at another kind of method in its paper of publishing " hot spray powder material preparation of spraying drying YPSZ nanostructure and sign " (" functional materials ", 2005 (11), Vol.36 (11), P:1769～1771).Adopt yttria-stabilized zirconia nanostructure ceramic powder material to prepare the nanostructure ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide and simultaneously deep research has been carried out in aspects such as preparation technology's method, coating heterogeneous microstructure, coating performance by plasma spray process.In application number 200510097797.2 patents, mentioned used for hot spraying yttria-stabilized zirconia nanostructure ceramic powder material and preparation method thereof, it is that raw material carries out spraying drying after by the proportional arrangement slurry of controlling water (alcohol), nano-powder material, additive that this patent adopts nano-powder material, finally obtains yttria-stabilized zirconia nanostructured powders material by sintering.This kind nanostructure hot spraying powder powder material loose density is relatively low, flowability is not high; usually also needing to carry out the energetic plasma processing makes its compact structure finally improve its loose density and flowing property; this process has improved the preparation cost and the spillage of material of powdered material greatly, finally causes the production cost height, is not easy to produce in batches.Lin Feng etc. are at " plasma spraying nanostructure thermal barrier coating microtexture and performance " (" China YouSe Acta Metallurgica Sinica ", 2006 (3), Vol.16 (3), P:482～487), and " YPSZ nanostructure hot spray powder material technology optimization research " (" Materials Science and Engineering journal ", 2006 (2), Vol.24 (1), P: 66～69) in the paper at aspects such as the preparation method of yttria-stabilized zirconia nanostructure ceramic powder material, optimum preparation condition, powdered material performance carried out deeply, detailed research.Adopt this method need at first prepare the yttria-stabilized zirconia nanostructure ceramic powder material of nanostructure, cause preparation process complicated, wayward.In addition, most of nanocrystal merges original nanostructure of growing up and losing in the thermal plasma spraying process, and the performance and the conventional coatings performance difference that finally cause preparing the nanostructure thermal barrier coating are little.
Still be not raw material prepares novel high-performance thermal barrier coating aspect by plasma spraying patent and bibliographical information at present about adopting the amorphous ceramic spherical powder material.The novel high-performance thermal barrier coating of the present invention's preparation has nano particle and the common a kind of special composite structure of forming of honeycomb-like network.It is that raw material passes through the preparation of characteristic atmospheric plasma spraying processing parameter that this coating adopts novel amorphous yttria-stabilized zirconia ceramic spherical powdered material.The amorphous yttria-stabilized zirconia ceramic spherical powdered material that is adopted is to be raw material with the salt crystalloid of zirconium and the salt crystalloid of yttrium, prepares by series of process such as chemical coprecipitation, gel pulp, spraying dryings.
Summary of the invention
Main purpose of the present invention provides a kind of ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide and preparation technology thereof.For the thermal barrier coating and nanostructure thermal barrier coating of traditional preparation process, this thermal barrier coating has novel nano particle and the common composite structure of forming of honeycomb-like network, characteristics such as high bond strength, lower thermal conductivity.
Another object of the present invention provides amorphous yttria-stabilized zirconia ceramic spherical powdered material and the production method that is used to prepare the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide that the present invention proposes.
The ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide that the present invention proposes is characterized in that described coating is the nano particle and the common composite structure of forming of honeycomb-like network of 2～24wt% yttria-stabilized zirconia.
Aforesaid ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide is characterized in that described coated material average grain size 5～100nm.
Be used to produce the material of ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide, it is characterized in that described material is an amorphous yttria-stabilized zirconia ceramic spherical powdered material, its phase structure is unformed amorphous yttria-stabilized zirconia.
Be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, it is characterized in that comprising the following steps: (1) with the salt crystalloid of the salt crystalloid of yttrium and zirconium according to part by weight 1: 10-1: 40 carry out thorough mixing with water; (2) adopt the method that evenly adds the alkali lye of high density fast to make two kinds of salt co-precipitation in the mixing solutions of step (1), 1-12h obtains gel by ageing; (3) mixture of water intaking or alcohol or water and alcohol; (4) solution in the gel and 3 is mixed fully according to 1: 0.5～4 ratios; (5) in the mixed solution of step (4), add dispersion agent, binding agent, and be made into slurry by ball milling, ultrasonic dispersing technology 0-5h; (6) by spraying drying or other drying-granulating technology the slurry of configuration is finally made the amorphous yttria-stabilized zirconia ceramic spherical powdered material that is suitable for used for hot spraying.
Describedly be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, the salt crystalloid that it is characterized in that yttrium is one or more in the crystal such as Yttrium trichloride, yttrium carbonate, Yttrium trinitrate, acetic acid yttrium, citric acid yttrium, and the salt crystalloid of zirconium is one or more in the crystal such as zirconium oxychloride, zirconium carbonate, zirconium nitrate, zirconium chloride, acetic acid zirconium.
Describedly be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, it is characterized in that being used for the quick alkali lye that adds of co-precipitation needs can be that highly basic also can be weak base, the concentration of alkali lye is 20%-60%, and the adding speed of alkali lye is 0.1-10kg/min.
Describedly be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, the dispersion agent that it is characterized in that disposing slurry is ethylene glycol 400, ethylene glycol 600, ethylene glycol 800 etc., binding agent is PVA, CMC etc., the weight percentage of dispersion agent in slurry is 0-5%, and the weight percentage of binding agent in slurry is 0-5%.
Describedly be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, it is characterized in that prilling process can be that centrifugal spray drying, pressure spray dryer, mixing stir a kind of in the drying-granulating technology.
Utilize the technology of the material preparation ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide of producing ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide, it is characterized in that adopting the plasma spraying technology of superpower, low powder feeding rate, long spray distance to be prepared amorphous yttria-stabilized zirconia ceramic spherical powdered material, its concrete plasma spray parameters is plasma power 45～60KW, spray distance 75～125mm, powder feeding rate 10～30g/min.
Ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide, preparation technology and the material thereof that the present invention proposes and the characteristic of production method are:
(1) the present invention proposes the novel high-performance ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide.And the structure of having pointed out coating is the common composite structure of forming of nano particle and honeycomb-like network.
(2) the novel high-performance ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide of the present invention's proposition, under the prerequisite of the thermal plasma spraying equipment not being transformed, adopt the plasma spraying technology of the superpower of characteristic, low powder feeding rate, long spray distance to be prepared.
(3) the present invention makes the salts solution co-precipitation, the direct pulp of the gelatinous mass after the ageing by the distinctive method that evenly adds the alkali lye of high density fast.By the dry and granulation of granulation processs such as spraying drying with gelatinous mass, no longer carry out any follow-up thermal treatment process, finally obtain the amorphous yttria-stabilized zirconia ceramic spherical powdered material that loose density height, good fluidity are applicable to the undefined structure of thermospray.
(4) simple, the equipment of the technological process of production of the amorphous yttria-stabilized zirconia ceramic spherical powdered material of the undefined structure that proposes of the present invention drop into little, energy consumption is low, with high content of technology, be easy to produce in batches.
Description of drawings
Accompanying drawing 1 novel high-performance thermal barrier coating sprayed surface stereoscan photograph;
Accompanying drawing 2 novel high-performance thermal barrier coating cross section stereoscan photographs;
Accompanying drawing 3 novel high-performance thermal barrier coating X-ray diffraction analysis figure;
Accompanying drawing 4 amorphous yttria-stabilized zirconia ceramic powder material pattern stereoscan photographs;
Accompanying drawing 5 amorphous yttria-stabilized zirconia ceramic powder material X-ray diffraction analysis figure.
Embodiment
Embodiment 1:
Be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, comprise the following steps: to get 100kg zirconium oxychloride and 4.86kg Yttrium trichloride crystal powder, add the 2000kg deionized water, evenly stir and obtain uniform solution.The 20min time adds the ammonia soln 70kg that concentration is 40wt.% in solution, and co-precipitation obtains gel and carries out the 2h ageing and handle, and obtains about 350kg stable gel after the washing after filtration.
Add the 350kg dehydrated alcohol at 1: 1 according to weight ratio, through stirring ball-milling 2h, ultrasonic dispersing 1h obtains uniform and stable slurry.
Adopt centrifugal spraying drying that uniform and stable gel slurry is carried out spray-drying process, inlet temperature is 350 ℃, and temperature out is 180 ℃, and centrifugal atomizing dish rotating speed is 11000r/min, and cyclonic separator is used to collect the powdered material after the granulation.Powder sieve (325 order) promptly obtain amorphous yttria-stabilized zirconia ceramic powder material product, its phase structure is unformed amorphous yttria-stabilized zirconia.This powder-product loose density is 1.9g/cm
3, flowability is 38s/50g
The technology of preparation ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide: utilize above-mentioned amorphous yttria-stabilized zirconia ceramic powder material product, the using plasma spray parameters is that plasma power 55KW, spray distance 110mm, powder feeding rate 30g/min are at the novel thermal barrier coating of superalloy matrix surface spraying preparation.
Ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide, described coating are the nano particle and the common composite structure of forming of honeycomb-like network of 8wt% yttria-stabilized zirconia, coated material average grain size 21nm.
Embodiment 2:
Be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, comprise the following steps: to get 100kg zirconium oxychloride and 4.86kg Yttrium trichloride crystal powder, add the 2000kg deionized water, evenly stir and obtain uniform solution.The 20min time adds the ammonia soln 70kg that concentration is 40wt.% in solution, and co-precipitation obtains gel and carries out the 2h ageing and handle, and obtains about 350kg stable gel after the washing after filtration.
Add the 350kg deionized water at 1: 1 according to weight ratio, 30ml ethylene glycol 600,2000mlPVA, through stirring ball-milling 2h, ultrasonic dispersing 1h obtains uniform and stable slurry.
Adopt centrifugal spraying drying that uniform and stable gel slurry is carried out spray-drying process, inlet temperature is 360 ℃, and temperature out is 160 ℃, and centrifugal atomizing dish rotating speed is 11000r/min, and cyclonic separator is used to collect the powdered material after the granulation.Powder sieve (325 order) promptly obtain amorphous yttria-stabilized zirconia ceramic powder material product, its phase structure is unformed amorphous yttria-stabilized zirconia.This powder-product loose density is 1.7g/cm
3, flowability is 46s/50g
The technology of preparation ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide: utilize above-mentioned amorphous yttria-stabilized zirconia ceramic powder material product, the using plasma spray parameters is that plasma power 50KW, spray distance 90mm, powder feeding rate 20g/min are at the novel thermal barrier coating of superalloy matrix surface spraying preparation.
Ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide, described coating are the nano particle and the common composite structure of forming of honeycomb-like network of 8wt% yttria-stabilized zirconia, coated material average grain size 12nm.
Embodiment 3:
Be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, comprise the following steps: to get 100kg zirconium oxychloride and 4.86kg Yttrium trichloride crystal powder, add the 2000kg deionized water, evenly stir and obtain uniform solution.The 20min time adds the ammonia soln 70kg that concentration is 40wt.% in solution, and co-precipitation obtains gel and carries out the 2h ageing and handle, and obtains about 350kg stable gel after the washing after filtration.
Add the 350kg dehydrated alcohol at 1: 1 according to weight ratio, through stirring ball-milling 2h, ultrasonic dispersing 1h obtains uniform and stable slurry.
Adopt that press spray is dry to carry out spray-drying process with uniform and stable gel slurry, inlet temperature is 350 ℃, and temperature out is 180 ℃, and two Fluid sprayer nozzle pressures are 6kg, and cyclonic separator is used to collect the powdered material after the granulation.Powder sieve (325 order) promptly obtain amorphous yttria-stabilized zirconia ceramic powder material product, its phase structure is unformed amorphous yttria-stabilized zirconia.This powder-product loose density is 1.8g/cm
3, flowability is 41s/50g
The technology of preparation ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide: utilize above-mentioned amorphous yttria-stabilized zirconia ceramic powder material product, the using plasma spray parameters is that plasma power 57KW, spray distance 100mm, powder feeding rate 25g/min are at the novel thermal barrier coating of superalloy matrix surface spraying preparation.
Ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide, described coating are the nano particle and the common composite structure of forming of honeycomb-like network of 8wt% yttria-stabilized zirconia, coated material average grain size 32nm.
Claims (9)
1, ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide is characterized in that described coating is the nano particle and the common composite structure of forming of honeycomb-like network of 2～24wt% yttria-stabilized zirconia.
2, ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide according to claim 1 is characterized in that described coated material average grain size 5～100nm.
3, the material that is used for production claim 1 or 2 described ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide, it is characterized in that described material is an amorphous yttria-stabilized zirconia ceramic spherical powdered material, its phase structure is unformed amorphous yttria-stabilized zirconia.
4, being applicable to that claim 3 is described is used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, it is characterized in that comprising the following steps: (1) with the salt crystalloid of the salt crystalloid of yttrium and zirconium according to part by weight 1: 10-1: 40 carry out thorough mixing with water; (2) adopt the method that evenly adds the alkali lye of high density fast to make two kinds of salt co-precipitation in the mixing solutions of step (1), 1-12h obtains gel by ageing; (3) mixture of water intaking or alcohol or water and alcohol; (4) solution in the gel and 3 is mixed fully according to 1: 0.5～4 ratios; (5) in the mixed solution of step (4), add dispersion agent, binding agent, and be made into slurry by ball milling, ultrasonic dispersing technology 0-5h; (6) by spraying drying or other drying-granulating technology the slurry of configuration is finally made the amorphous yttria-stabilized zirconia ceramic spherical powdered material that is suitable for used for hot spraying.
5, according to claim 4ly be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, the salt crystalloid that it is characterized in that yttrium is one or more in the crystal such as Yttrium trichloride, yttrium carbonate, Yttrium trinitrate, acetic acid yttrium, citric acid yttrium, and the salt crystalloid of zirconium is one or more in the crystal such as zirconium oxychloride, zirconium carbonate, zirconium nitrate, zirconium chloride, acetic acid zirconium.
6, according to claim 5ly be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, it is characterized in that being used for the quick alkali lye that adds of co-precipitation needs can be that highly basic also can be weak base, the concentration of alkali lye is 20%-60%, and the adding speed of alkali lye is 0.1-10kg/min.
7, according to claim 6ly be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, the dispersion agent that it is characterized in that disposing slurry is ethylene glycol 400, ethylene glycol 600, ethylene glycol 800 etc., binding agent is PVA, CMC etc., the weight percentage of dispersion agent in slurry is 0-5%, and the weight percentage of binding agent in slurry is 0-5%.
8, according to claim 7ly be used to produce the ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide preparation methods, it is characterized in that prilling process can be that centrifugal spray drying, pressure spray dryer, mixing stir a kind of in the drying-granulating technology.
9, utilize the technology of the material preparation ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide of the described production ceramic heat-barrier coating of stabilizing zirconium oxide by Yttrium oxide of claim 3, it is characterized in that adopting the plasma spraying technology of superpower, low powder feeding rate, long spray distance to be prepared amorphous yttria-stabilized zirconia ceramic spherical powdered material, its concrete plasma spray parameters is plasma power 45～60KW, spray distance 75～125mm, powder feeding rate 10～30g/min.
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| CN113430481A (en) * | 2021-06-25 | 2021-09-24 | 西安热工研究院有限公司 | Tungsten carbide-yttria-stabilized zirconia composite thermal barrier coating and preparation method thereof |
| CN116496076A (en) * | 2023-04-27 | 2023-07-28 | 江苏大学 | Al (aluminum) alloy 2 O 3 TiC composite material and preparation method and electrochemical repair method thereof |
| CN116496076B (en) * | 2023-04-27 | 2024-06-07 | 江苏大学 | Al (aluminum) alloy2O3TiC composite material and preparation method and electrochemical repair method thereof |
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