CN103319920A - Composite micro-nanometer zirconia-based high temperature abradable sealed coating material and preparation method thereof - Google Patents
Composite micro-nanometer zirconia-based high temperature abradable sealed coating material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a composite micro-nanometer zirconia-based high temperature abradable sealed coating material and a preparation method thereof, and the material is made by compositing a base-phase component A, a base-phase component B, a bonding component, a solid lubrication component and a poring component, wherein the content of each component, based on weight percentage, are as following: 60-70 wt% of base-phase component A, 15-20 wt% of base-phase component B, 5-15 wt% of bonding component, 1-3 wt% of solid lubrication component and 5-8 wt% of poring component; the coating material is obtained through fixing, spraying granulation and screening the components. The coating prepared by the invention has high deposition efficiency, strong high-temperature thermal stability, appropriate coating thickness and hardness, good abrasivity and bonding strength etc.
Description
Technical field
The present invention relates to a kind of abradable seal coating material, particularly a kind of compound micro-nano zirconia base high-temperature abrasive sealing coating material that can be used for plasma spraying and preparation method thereof.
Background technology
In recent years, along with the fast development of aerospace industry, the performance of turbine engine is also had higher requirement.The working temperature at turbine casing position has reached 1000～1350 ℃, and requires coating to have better heat-shock resistance, erosion wear resistance, abradability and high-temperature stability.And at present seal coating commonly used such as AlSi-graphite, Ni-graphite, NiCrAl-wilkinite, NiCrAl-hBN etc. are because the fusing point of basic phase material is low, and the seal coating that causes preparing only limits to middle low temperature and uses, and its use temperature generally is no more than 900 ℃.Therefore the high-temperature abradable seal coating of studying refractory oxide and be basic phase has become at present the focus of seal coating research field both at home and abroad.
The stable form zirconia ceramics has good thermotolerance, heat-shock resistance and thermostability, and therefore the high-temperature abradable seal coating of research and development is basic phase material mainly with zirconium white at present.Mostly the high temperature seal coating of inquiring into former studies is take the micron order zirconium white as single basic phase, or nano zircite is the high temperature seal coating of single basic phase, but the micron order zirconium white is the high temperature seal coating of basic phase in use easily becomes piece to come off, and that nano zircite is the spray deposited efficient of high temperature seal coating of basic phase is low, also has defective on the abradability of long service.This shows, research has that sedimentation effect is high, high high-temp stability is strong, abradability and the good high temperature seal coating of bonding strength have important using value and adapt to preferably the development of aerospace engine.
Summary of the invention
The object of the present invention is to provide a kind of compound micro-nano zirconia base high-temperature abrasive sealing coating material with excellent comprehensive performance and preparation method thereof.
The present invention solves the problems of the technologies described above the technical scheme that adopts: a kind of compound micro-nano zirconia base high-temperature abrasive sealing coating material, it includes basic phase component A, basic phase component B, adhesion component, solid lubrication component and pore-creating component and makes through compound, described each component concentration is: basic phase component A60～70wt%, base phase component B15～20wt%, adhesion component 5～15wt%, solid lubrication component 1～3wt%, pore-creating component 5～8wt%.
Press such scheme, the nano level yttrium oxide PSZ Y-PSZ that described basic phase component A is particle diameter 20～60nm; Base phase component B is the micron order yttrium oxide PSZ Y-PSZ of particle diameter 0.5～5 μ m.
Press such scheme, described adhesion component is nano aluminium oxide, and that wherein select is the α-Al of high-temperature stable
2O
3, the granularity of nano aluminium oxide is 15～30nm.
Press such scheme, described solid lubrication component is hexagonal boron nitride, and its granularity is 0.5～2 μ m; Described pore-creating component is polybenzoate, and its granularity is 20～38 μ m.
The preparation method of described compound micro-nano zirconia base high-temperature abrasive sealing coating material is characterized in that may further comprise the steps:
(1) batching: take by weighing by weight percentage raw material powder base phase component A60～70wt%, basic phase component B15～20wt%, adhesion component 5～15wt%, solid lubrication component 1～3wt%, pore-creating component 5～8wt% mixes;
(2) batch mixing: get the dextrin of the 2～5wt% that is equivalent to raw material powder weight, mix in the adding raw material powder, then add the water of 70～80wt% of raw material powder weight, be deployed into slip;
(3) mist projection granulating: with step 2) through atomization drying, mist projection granulating tower temperature is controlled at 110～320 ℃ to resulting slip, makes hollow reunion powder in the mist projection granulating tower;
(4) screening: the resulting reunion powder of step 3) is sieved, get the reunion powder of 30～90 μ m, be compound micro-nano zirconia base high-temperature abrasive sealing coating material product.
Press such scheme, the nano level yttrium oxide PSZ Y-PSZ that described basic phase component A is particle diameter 20～60nm, the content of nano zircite accounts for 93～95mol%, and the content of nano yttrium oxide accounts for 5～7mol%; Base phase component B is the micron order yttrium oxide PSZ Y-PSZ of particle diameter 0.5～5 μ m, and the zirconic content of micron accounts for 93～95mol%, and the content of nano yttrium oxide accounts for 5～7mol%, and described micron zirconium white is the broken zirconium white of electric smelting type.
Press such scheme, described adhesion component is nano aluminium oxide, and that wherein select is the α-Al of high-temperature stable
2O
3, the granularity of nano aluminium oxide is 15～30nm.
Press such scheme, described solid lubrication component is hexagonal boron nitride, and its granularity is 0.5～2 μ m; Described pore-creating component is polybenzoate, and its granularity is 20～38 μ m.
Composite Nano zirconium white of the present invention and micron zirconium white are made high temperature resistant basic phase component, nano zircite and micron zirconium white are nano oxidized yttrium partially stabilized zirconium white Y-PSZ, nano aluminium oxide is made adhesion component, and hexagonal boron nitride is made the solid lubrication component, and polybenzoate is made the pore-creating component.
The present invention compared with prior art has advantages of following main:
1) the present invention selects nano zircite to make main basic phase, and add quantitative micron zirconium white and make auxiliary basic phase, consist of compound micro-nano base phase material, the stone that adds in the similar concrete and sand structure, the micron zirconium white improves energy of the impinging jet, nano zircite plays filling can alleviate the coating local stress, increases the bonding force between the particle.Can make so more mortise of each component of coating, can effectively improve the bonding properties of coating, the seal coating sedimentation effect of preparation significantly improves compared to prior art, and the coating honeycomb structure is obvious, spraying crackle without large has good high high-temp stability and heat-shock resistance.Simultaneously, the present invention is better gathered in conjunction with single phase nano zirconia coating hole, and short texture and single-phase micron zirconia coating hole are sparse, the characteristics of compact structure, the seal coating hole of preparation is relative with density suitable, is in the ideal grade zone fully, has good abradability energy;
2) add a certain amount of nano aluminium oxide in the compound micro-nano zirconia base phase material, the fusing point of nano aluminium oxide is low than zirconium white, but sprayability is good, more easily fusing in spraying process, all the other components and basic phase material well can be bondd and coupling, different components can not lose efficacy because the phase composition segregation rejection phase situation occurs yet, thereby has improved the sedimentation effect of coated material yet;
3) solid lubrication component hexagonal boron nitride can play the effect of liquid phase bonding hexagonal boron nitride because fusing point (3000 ℃) is high, the fusing effect is general in plasma flame flow, be difficult for deposition, and the adhesion component nano aluminium oxide melts more easily.Because hexagonal boron nitride matter is soft and have a good self lubricity, can effectively improve the seal coating thermal stress distribution that different components material thermal expansion coefficient difference brings when high temperature changes, stop the unordered expansion of a large amount of fine cracks of material internal, strengthened the strain adjusted effect.The hardness that the soft boron nitride of while matter can also effectively be regulated seal coating improves the abradability energy;
4) polybenzoate is as a kind of resistant to elevated temperatures special engineered material, its thermal conductivity and in air high high-temp stability all very high.In material, fill the larger polybenzoate of a certain amount of particle diameter, because volume is larger, can avoid in the coating preparation, too much being ablated by plasma flame flow, fully be filled in the seal coating, make the seal coating hole relative with density suitable, thereby hardness and the heat-shock resistance of coating played regulating effect.
5) compound micro-nano YPSZ base sealing coating material sedimentation effect is remarkable, can prepare thickness in the above coating of 2.5mm, and the coat-thickness wide ranges with suitable hardness, high with substrate combinating strength, thermostability and the thermal shock resistance between 1000 ℃～room temperature in 1000 ℃ of environment are better, and whole each performance of seal coating can finely satisfy service requirements.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with specific embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
Getting granularity is the nano level yttrium oxide PSZ Y-PSZ7.0kg of 20～60nm, the content of nano zircite accounts for 93～95mol%, the content of nano yttrium oxide accounts for 5～7mol%, granularity is the micron order yttrium oxide PSZ Y-PSZ1.8kg of 0.5～5 μ m, the zirconic content of micron accounts for 93～95mol%, the content of nano yttrium oxide accounts for 5～7mol%, described micron zirconium white is the broken zirconium white of electric smelting type, granularity is the Nano-sized Alumina Powder 0.5kg of 15～30nm, and it is the α-Al of high-temperature stable
2O
3, granularity is the hexagonal boron nitride powder 0.2kg of 0.5～2 μ m, granularity is the polybenzoate 0.5kg of 20～38 μ m, and it is mixed.Get the 0.4kg dextrin, after sufficiently mixing, add 8.0kg distilled water in the adding raw material powder again, the slip that stirs into the Uniform Dispersion suspension is stand-by.
Become fine droplets to spray in the mist projection granulating tower slurry atomization with the centrifugal atomizing nozzle, gaseous tension is controlled at 0.8MPa, and the spraying gun rotating speed is 18000～20000r/min.The drop of atomizing relies on the surface tension of self to be shrunk to spheroidal particle, and is dry in hot blast, in the mist projection granulating tower heating and temperature control in 140～250 ℃ of scopes, the adjusting of temperature height so that the abundant drying of powder be limited.Collect in the hollow reunion powder suction cyclonic separator of the drying that will obtain by vacuum fan subsequently.The reunion powder of collecting is sieved through mechanical sub-sieve, and the powder of getting size range and be 30～90 μ m namely gets the compound micro-nano zirconia base of product high-temperature abrasive sealing coating material.
Measure loose density and the flowability of powder with Hall flow meter, with the pattern of scanning electron microscopic observation powder.Test result is listed in table 1.
The test data of embodiment 1 obtained powder
Table 1
Embodiment 2:
Getting granularity is the nano level yttrium oxide PSZ Y-PSZ6.2kg of 20～60nm, the content of nano zircite accounts for 93～95mol%, the content of nano yttrium oxide accounts for 5～7mol%, granularity is the micron order yttrium oxide PSZ Y-PSZ1.9kg of 0.5～5 μ m, the zirconic content of micron accounts for 93～95mol%, the content of nano yttrium oxide accounts for 5～7mol%, described micron zirconium white is the broken zirconium white of electric smelting type, granularity is the alumina powder 1.0kg of 15～30nm, granularity is the hexagonal boron nitride powder 0.3kg of 0.5～2um, granularity is the polybenzoate 0.6kg of 20～38um, and it is mixed.Get the 0.3kg dextrin, after sufficiently mixing, add 7.5kg distilled water in the adding raw material powder again, the slip that stirs into the Uniform Dispersion suspension is stand-by.
Become fine droplets to spray in the mist projection granulating tower slurry atomization with the centrifugal atomizing nozzle, gaseous tension is controlled at 0.8MPa, and the spraying gun rotating speed is 18000～20000r/min.The drop of atomizing relies on the surface tension of self to be shrunk to spheroidal particle, and is dry in hot blast, in the mist projection granulating tower heating and temperature control in 140～250 ℃ of scopes, the adjusting of temperature height so that the abundant drying of powder be limited.Collect in the reunion powder suction cyclonic separator of the drying that will obtain by vacuum fan subsequently.The reunion powder of collecting is sieved through mechanical sub-sieve, and the powder of getting size range and be 30～90 μ m namely gets product.
Measure loose density and the flowability of powder with Hall flow meter, with the pattern of scanning electron microscopic observation powder.Test result is listed in table 2.
The test data of embodiment 2 obtained powder
Table 2
Embodiment 3:
Getting granularity is the nano level yttrium oxide PSZ Y-PSZ6.8kg of 20～60nm, the content of nano zircite accounts for 93～95mol%, the content of nano yttrium oxide accounts for 5～7mol%, granularity is the micron order yttrium oxide PSZ Y-PSZ1.5kg of 0.5～5 μ m, the zirconic content of micron accounts for 93～95mol%, the content of nano yttrium oxide accounts for 5～7mol%, described micron zirconium white is the broken zirconium white of electric smelting type, granularity is the alumina powder 0.8kg of 15～30nm, granularity is the hexagonal boron nitride powder 0.1kg of 0.5～2um, granularity is the polybenzoate 0.8kg of 20～38um, and it is mixed.Get the 0.4kg dextrin, after sufficiently mixing, add 8.0kg distilled water in the adding raw material powder again, the slip that stirs into the Uniform Dispersion suspension is stand-by.
Become fine droplets to spray in the mist projection granulating tower slurry atomization with the centrifugal atomizing nozzle, gaseous tension is controlled at 0.8MPa, and the spraying gun rotating speed is 18000～20000r/min.The drop of atomizing relies on the surface tension of self to be shrunk to spheroidal particle, and is dry in hot blast, in the mist projection granulating tower heating and temperature control in 140～250 ℃ of scopes, the adjusting of temperature height so that the abundant drying of powder be limited.Subsequently by collecting in the reunion powder suction cyclonic separator of vacuum fan with drying.The reunion powder of collecting is sieved through mechanical sub-sieve, and the powder of getting size range and be 30～90 μ m namely gets product.
Measure loose density and the flowability of powder with Hall flow meter, with the pattern of scanning electron microscopic observation powder.Test result is listed in table 3.
The test data of embodiment 3 obtained powder
Table 3
Embodiment 4:
Getting granularity is the nano level yttrium oxide PSZ Y-PSZ6.0kg of 20～60nm, the content of nano zircite accounts for 93～95mol%, the content of nano yttrium oxide accounts for 5～7mol%, granularity is the micron order yttrium oxide PSZ Y-PSZ1.9Kg of 0.5～5 μ m, the zirconic content of micron accounts for 93～95mol%, the content of nano yttrium oxide accounts for 5～7mol%, described micron zirconium white is the broken zirconium white of electric smelting type, granularity is the alumina powder 1.5kg of 15～30nm, granularity is the hexagonal boron nitride powder 0.1Kg of 0.5～2um, granularity is the polybenzoate 0.5kg of 20～38um, and it is mixed.Get the 0.3kg dextrin, after sufficiently mixing, add 7.5kg distilled water in the adding raw material powder again, the slip that stirs into the Uniform Dispersion suspension is stand-by.
Become fine droplets to spray in the mist projection granulating tower slurry atomization with the centrifugal atomizing nozzle, gaseous tension is controlled at 0.8MPa, and the spraying gun rotating speed is 18000～20000r/min.The drop of atomizing relies on the surface tension of self to be shrunk to spheroidal particle, and is dry in hot blast, in the mist projection granulating tower heating and temperature control in 140～250 ℃ of scopes, the adjusting of temperature height so that the abundant drying of powder be limited.Subsequently by collecting in the reunion powder suction cyclonic separator of vacuum fan with drying.The reunion powder of collecting is sieved through mechanical sub-sieve, and the powder of getting size range and be 30～90 μ m namely gets product.
Measure loose density and the flowability of powder with Hall flow meter, with the pattern of scanning electron microscopic observation powder.Test result is listed in table 4.
The test data of embodiment 4 obtained powder
Table 4
Embodiment 1-4 gained powder is as shown in table 5 below by the bonding strength that common process prepares coating
Table 5
Embodiment 1-4 gained powder is as shown in table 6 below by the thermal shock performance that common process prepares coating
Table 6
Embodiment 1-4 gained powder is as shown in table 7 below by the sedimentation effect that common process prepares coating
Table 7
Claims (8)
1. compound micro-nano zirconia base high-temperature abrasive sealing coating material, it includes basic phase component A, basic phase component B, adhesion component, solid lubrication component and pore-creating component and makes through compound, described each component concentration is: basic phase component A60～70wt%, base phase component B15～20wt%, adhesion component 5～15wt%, solid lubrication component 1～3wt%, pore-creating component 5～8wt%.
2. according to claims 1 described compound micro-nano zirconia base high-temperature abrasive sealing coating material, it is characterized in that the nano level yttrium oxide PSZ Y-PSZ that described basic phase component A is particle diameter 20～60nm; Base phase component B is the micron order yttrium oxide PSZ Y-PSZ of particle diameter 0.5～5 μ m.
3. according to claims 1 described compound micro-nano zirconia base high-temperature abrasive sealing coating material, it is characterized in that described adhesion component is nano aluminium oxide, that wherein select is the α-Al of high-temperature stable
2O
3, the granularity of nano aluminium oxide is 15～30nm.
4. according to claims 1 described compound micro-nano zirconia base high-temperature abrasive sealing coating material, it is characterized in that described solid lubrication component is hexagonal boron nitride, its granularity is 0.5～2 μ m; Described pore-creating component is polybenzoate, and its granularity is 20～38 μ m.
5. the preparation method of compound micro-nano zirconia base high-temperature abrasive sealing coating material claimed in claim 1 is characterized in that may further comprise the steps:
1) batching: take by weighing by weight percentage raw material powder base phase component A60～70wt%, basic phase component B15～20wt%, adhesion component 5～15wt%, solid lubrication component 1～3wt%, pore-creating component 5～8wt% mixes;
2) batch mixing: get the dextrin of the 2～5wt% that is equivalent to raw material powder weight, mix in the adding raw material powder, then add the water of 70～80wt% of raw material powder weight, be deployed into slip;
3) mist projection granulating: with step 2) through atomization drying, mist projection granulating tower temperature is controlled at 110～320 ℃ to resulting slip, makes hollow reunion powder in the mist projection granulating tower;
4) screening: the resulting reunion powder of step 3) is sieved, get the reunion powder of 30～90 μ m, be compound micro-nano zirconia base high-temperature abrasive sealing coating material product.
6. according to the preparation method of claims 5 described compound micro-nano zirconia base high-temperature abrasive sealing coating materials, it is characterized in that the nano level yttrium oxide PSZ Y-PSZ that described basic phase component A is particle diameter 20～60nm, the content of nano zircite accounts for 93～95mol%, and the content of nano yttrium oxide accounts for 5～7mol%; Base phase component B is the micron order yttrium oxide PSZ Y-PSZ of particle diameter 0.5～5 μ m, and the zirconic content of micron accounts for 93～95mol%, and the content of nano yttrium oxide accounts for 5～7mol%, and described micron zirconium white is the broken zirconium white of electric smelting type.
7. according to the preparation method of claims 1 described compound micro-nano zirconia base high-temperature abrasive sealing coating material, it is characterized in that described adhesion component is nano aluminium oxide, that wherein select is the α-Al of high-temperature stable
2O
3, the granularity of nano aluminium oxide is 15～30nm.
8. according to the preparation method of claims 1 described compound micro-nano zirconia base high-temperature abrasive sealing coating material, it is characterized in that described solid lubrication component is hexagonal boron nitride, its granularity is 0.5～2 μ m; Described pore-creating component is polybenzoate, and its granularity is 20～38 μ m.
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Application publication date: 20130925 |