CN110423919A - A kind of last stage vane of steam turbine water erosion protective coating and preparation method thereof - Google Patents

A kind of last stage vane of steam turbine water erosion protective coating and preparation method thereof Download PDF

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Publication number
CN110423919A
CN110423919A CN201910716609.1A CN201910716609A CN110423919A CN 110423919 A CN110423919 A CN 110423919A CN 201910716609 A CN201910716609 A CN 201910716609A CN 110423919 A CN110423919 A CN 110423919A
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China
Prior art keywords
water erosion
layer
spraying
metal back
coating
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CN201910716609.1A
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CN110423919B (en
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李太江
栾俊
刘立营
杨新宇
李巍
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Xian Thermal Power Research Institute Co Ltd
Huaneng Jinan Huangtai Power Generation Co Ltd
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Thermal Power Research Institute
Huaneng Jinan Huangtai Power Generation Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/12—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on oxides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/288—Protective coatings for blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/611—Coating

Abstract

A kind of last stage vane of steam turbine water erosion protective coating, its structure includes metal back layer and anti-water erosion layer, the metal back layer is the NiCrBSi coating of activated combustion high-velocity air-fuel spraying equipment preparation, the anti-water erosion layer is the NiCrBSi-YSZ coating of air plasma spraying equipment preparation, and YSZ is nanostructure in the anti-water erosion layer.Metal back layer plays the coefficient of expansion mismatch problem for alleviating basic material of blade and the anti-water erosion interlayer of ceramics as transition zone, slow down the anti-water erosion layer of ceramics in preparation and use process because of temperature change caused by fall off；Secondly, metal back layer can be used as " the soft bottom " of the anti-water erosion layer of ceramics, impact of the water droplet to anti-water erosion layer surface can be dispersed during military service；A certain amount of transition metal powder is added in anti-water erosion layer, is prepared using air plasma spraying technique, and metal phase is filled with the aperture position in original ceramic layer in the coating after the completion of spraying, so that anti-water erosion layer is finer and close, impact water in corrosion resistance can be more excellent.

Description

A kind of last stage vane of steam turbine water erosion protective coating and preparation method thereof
Technical field
The present invention relates to the steamers under a kind of water erosion resistent protective coating and preparation method thereof more particularly to depth peak regulation operating condition Machine exhaust stage blade water erosion protective coating and preparation method thereof.
Background technique
With the continuous development of power industry, the major grid power load peak-valley difference in China increases year by year, and each power grid is both needed to Increase the fm capacity of Large-scale machine set, this just forces unit to run under off-design behaviour, even house load operation. Turbine blade, especially large-size steam turbine blade, when steam turbine is in underrun, what operating condition of end change it is maximum, Operating condition locating for exhaust stage blade is extremely complex.The operating temperature of the every grade blade of steam turbine is different from, the first grade blade institute The temperature highest at place, common unit are 535 DEG C, 580 DEG C of large-sized unit or so.Then since steam does work, temperature is gradually reduced, directly 100 DEG C or less are dropped to exhaust stage blade.The final stage exhaust steam moisture of high-power condensing turbine is always bigger, generally up to 9%~14%, exhaust stage blade circular velocity is in 300m/s or more.A large amount of water droplet is carried after last stage movable vane in steam flow, reflux Lagging edge of the water droplet impingement that steam carries in high-speed rotating movable vane piece lower half.To it is certain oneself it is long when the blade that runs, In When underload or high back pressure, large-scale reflux can be generated, even up to leaf it is high 2/3 or more.For this kind of blade, steam output side Water erosion just become very serious.After water erosion occurs for blade, appearance is honeycomb, and serious person makes back edge edge that saw be presented Dentation forms many tiny crackles.These positions are easy to generate stress concentration, and fatigue resistance reduces, and water erosion develops to The vibration characteristics that blade can also be changed to a certain degree causes unit that the serious accidents such as judder occur, and can make stage efficiency Decline.
The method repaired at present about exhaust stage blade water erosion protection at present has: blade inlet edge is carried on the back arc side soldering Si Taili and is closed Gold plaque, laser melting and coating technique prepare water erosion-proof coating etc..But with the implementation of depth peak regulation, exhaust stage blade operating condition is increasingly disliked Bad, water erosion region also extends to back edge, water erosion range further expansion from blade inlet edge, and degree of water erosion aggravation is disliked Change, existing protective approach is not suitable for the protection of the exhaust stage blade water erosion under depth peak regulation operating condition.It is further with water erosion range Expand, the length for being brazed stellite alloy sheet also increases, and heat input becomes larger in repair process, causes during REPAIR WELDING Contraction distortion be difficult to ensure the installation accuracy of blade.It is anti-for the laser melting and coating technique preparation mentioned in current multinomial patent Water erosion coating technology, since (fluctuation of Centimeter Level can all influence to melt laser on the sensibility of cladding distance in laser cladding process The quality of coating), the water erosion region of exhaust stage blade becomes larger under depth peak regulation operating condition, to protective position narrow gaps, not can guarantee Cladding distance, therefore this kind of technique also has very big limitation, operation difficulty is very big, is not easy success.
Therefore, it as a new step for operating condition after peak regulation deteriorates, improves exhaust stage blade and prevents erodible energy and security reliability, become It obtains very urgent and crucial.
Summary of the invention
It is an object of that present invention to provide a kind of water resistants for solving the problems, such as depth peak regulation operating condition tubine exhaust stage blade water erosion Erosion resisting coating and preparation method thereof.Protection can be formed on blade entry/exit gas side using the water resistant erosion resisting coating of the method for the present invention preparation to apply Layer solves leaf caused by depth peak regulation operating condition tubine exhaust stage blade aggravates because of water erosion to achieve the effect that water erosion resistent Piece cracking, fracture etc. lead to the serious accident of unit generation judder.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of last stage vane of steam turbine water erosion protective coating, the water erosion-proof coating include metal back layer and be located at metal bottom Anti- water erosion layer on layer；
The raw material of the metal back layer are NiCrBSi powder, and powdered ingredients mass percentage range is as follows: Cr:13- 16%, B:2-5%, Si:3-7%, Fe:3.7%, C:1-2%, surplus are Ni and inevitable impurity；
The anti-water erosion layer are as follows: NiCrBSi-YSZ, wherein YSZ is 8%Y2O3Stablize ZrO2；YSZ in the anti-water erosion layer For nanostructure；
NiCrBSi mass percent is 10-25% in the anti-water erosion layer, remaining is YSZ.
The metal back layer is with a thickness of 0.1-0.15mm.
The anti-water erosion thickness degree is 0.2-0.4mm；
The preparation method of the last stage vane of steam turbine water erosion protective coating, includes the following steps:
Step 1: grinding process is carried out to water erosion damage location occurs, after obtaining the smooth surface that can be used for spraying, into Row blasting treatment；To new blade, then direct blasting treatment；Surface roughness R after above-mentioned two situations blasting treatmentaReach 80-100 microns；
Step 2: NiCrBSi powder and nanocrystals YSZ powder are subjected to mechanical mixture, obtain anti-water erosion layer dusty material, Middle NiCrBSi mass percent is 10-25%, remaining is YSZ；
Step 3: low temperature drying, drying temperature 150 are carried out to metal back layer NiCrBSi powder and anti-water erosion layer dusty material ℃-200℃；
Step 4: using the metal back layer of activated combustion high-velocity air-fuel spraying equipment spraying water erosion-proof coating, spraying process ginseng Number are as follows: air pressure 0.4-0.6MPa, propane pressure 0.4-0.65MPa, nitrogen flow 50-60L/min, spray distance For 300-325mm；Spraying point multiple tracks carries out；
Step 5: using the water erosion resistent layer in air plasma spraying equipment spraying water erosion-proof coating, spraying parameter Are as follows: electric current 600-700A, voltage 50-65V, main gas Ar flow are 55-65slpm, secondary gas H2Flow is 3.5- 4.5slpm, spray distance 70-90mm；Spraying point multiple tracks carries out；
Metal back layer is asked as the coefficient of expansion mismatch that transition zone plays alleviation basic material of blade and the anti-water erosion interlayer of ceramics Topic, slow down the anti-water erosion layer of ceramics in preparation and use process because of temperature change caused by fall off；Using the high quick burning of activated combustion The metal back layer coating porosity of gas blowout automatic doubler surface glouer spraying is small, and coating is fine and close, and no inner oxidation；Metal back layer is as ceramic waterproof " the soft bottom " for losing layer disperses impact of the water droplet to anti-water erosion layer surface during military service；
A certain amount of metal back layer powder is added in anti-water erosion layer, is sprayed, has been sprayed using air plasma spraying technique Metal phase is filled with the aperture position in ceramic layer in coating after, so that anti-water erosion layer is finer and close.
Intermediate metal plays the coefficient of expansion mismatch problem for alleviating basic material of blade and the anti-water erosion interlayer of ceramics, slows down pottery The anti-water erosion layer of porcelain in preparation and use process because of temperature change caused by fall off；Secondly, being sprayed using activated combustion high-speed fuel gas The much small other hot-spraying technique prepares coating porositys of metal back layer coating porosity of automatic doubler surface glouer spraying, coating cause enough It is close, and basic no inner oxidation.Intermediate metal can be used as " the soft bottom " of the anti-water erosion layer of ceramics, can disperse water droplet during military service Impact to anti-water erosion layer surface；
A certain amount of transition metal powder is added in anti-water erosion layer, is sprayed using air plasma spraying technique, spraying Metal phase is filled with the aperture position in original ceramic layer in coating after the completion, so that anti-water erosion layer is finer and close, resistance to water erosion Performance is more excellent.
Compared with the method for conventional brazing stellite alloy sheet, add fine and close water erosion by using soft bottom of the present invention The water resistant layer coating that layer structure and preparation method thereof obtains, water erosion resistent effect improve 2-3 times.
The present invention has the advantage that
1) metal back layer prepared by the present invention and water erosion resistent layer coating use the structure in soft bottom stiffened face, effective to alleviate Surface impacts of the water droplet to anti-water erosion layer, meanwhile, the anti-water erosion layer of densification further improves coating service life；
2) present invention is grasped using hot-spraying technique (activated combustion high-velocity air-fuel spraying equipment/air plasma spraying equipment) Make simple, it can be achieved that original position, small clearance position spraying large area spraying.Compared to laser melting and coating process, to cladding apart from unwise Sense, is easier to implement.
Specific embodiment
Invention is further described in detail With reference to embodiment.
Embodiment: for certain 600MW power generator turbine blade stellite, there is a phenomenon where water erosions, firstly, to sawtooth The damage of shape is polished, and is formed even curface, is treated zone of protection periphery and protected by 0.5mm sheet iron, is used The Brown Alundum of 24 mesh carries out sandblasting, is cleared up using high pressure dry air after the completion of sandblasting sandblasting position.Using NiCrBSi Powder is sprayed as intermediate metal, and using activated combustion high-velocity air-fuel spraying equipment, spraying parameter are as follows: air Pressure is 0.45MPa, propane pressure 0.5MPa, nitrogen flow 50L/min, spray distance 310mm.Spraying divide multiple tracks into Row, coating thickness 0.1mm.Water erosion resistent layer is prepared using NiCrBSi-YSZ powder, wherein NiCrBSi mass percent is 15%, coating preparation is carried out after NiCrBSi-YSZ is carried out mechanical mixture by meal mixer.Using air plasma spraying equipment Spray water erosion resistent layer, spraying parameter are as follows: electric current 650A, voltage 50V, main gas (Ar) flow are 55slpm, secondary gas (H2) it is flow 4slpm, spray distance 80mm.Spraying point multiple tracks carries out, coating thickness 0.3mm.In spraying process, melt Melt the aperture position that metal phase is filled in ceramic layer, so that water erosion resistent layer porosity reduces, water erosion resistent layer is finer and close.This Outside, presence of the metal back layer as transition zone, so that combined between coating interface more preferably, it is closer.Above-mentioned spraying method can simultaneously Rake angle carries out, therefore is not limited by the narrow space construction of Steam Turbine Field.

Claims (4)

1. a kind of last stage vane of steam turbine water erosion protective coating, it is characterised in that: the water erosion-proof coating include metal back layer and Anti- water erosion layer on metal back layer；
The raw material of the metal back layer are NiCrBSi powder, and powdered ingredients mass percentage range is as follows: Cr:13- 16%, B:2-5%, Si:3-7%, Fe:3.7%, C:1-2%, surplus are Ni and inevitable impurity；
The anti-water erosion layer are as follows: NiCrBSi-YSZ, wherein YSZ is 8%Y2O3Stablize ZrO2；YSZ is to receive in the anti-water erosion layer Rice structure；
NiCrBSi mass percent is 10-25% in the anti-water erosion layer, remaining is YSZ.
2. a kind of last stage vane of steam turbine water erosion protective coating according to claim 1, it is characterised in that: the metal bottom Layer is with a thickness of 0.1-0.15mm.
3. a kind of last stage vane of steam turbine water erosion protective coating according to claim 1, it is characterised in that: the anti-water erosion Layer is with a thickness of 0.2-0.4mm.
4. the preparation method of the described in any item last stage vane of steam turbine water erosion protective coatings of claims 1 to 3, feature exist In including the following steps:
Step 1: carrying out grinding process to water erosion damage location occurs, after obtaining the smooth surface that can be used for spraying, sprayed Sand processing；To new blade, then direct blasting treatment；Surface roughness R after above-mentioned two situations blasting treatmentaReach 80-100 Micron；
Step 2: NiCrBSi powder and nanocrystals YSZ powder are subjected to mechanical mixture, obtain anti-water erosion layer dusty material, wherein NiCrBSi mass percent is 10-25%, remaining is YSZ；
Step 3: low temperature drying, 150 DEG C of drying temperature-are carried out to metal back layer NiCrBSi powder and anti-water erosion layer dusty material 200℃；
Step 4: using the metal back layer of activated combustion high-velocity air-fuel spraying equipment spraying water erosion-proof coating, spraying parameter Are as follows: air pressure 0.4-0.6MPa, propane pressure 0.4-0.65MPa, nitrogen flow 50-60L/min, spray distance are 300-325mm；Spraying point multiple tracks carries out；
Step 5: using the water erosion resistent layer in air plasma spraying equipment spraying water erosion-proof coating, spraying parameter are as follows: electricity Stream is 600-700A, and voltage 50-65V, main gas Ar flow is 55-65slpm, secondary gas H2Flow is 3.5-4.5slpm, spray Applying distance is 70-90mm；Spraying point multiple tracks carries out；
Metal back layer plays the coefficient of expansion mismatch problem for alleviating basic material of blade and the anti-water erosion interlayer of ceramics as transition zone, subtracts The slow anti-water erosion layer of ceramics in preparation and use process because of temperature change caused by fall off；Using activated combustion high-velocity air-fuel spraying The metal back layer coating porosity of equipment spraying is small, and coating is fine and close, and no inner oxidation；Metal back layer is as the anti-water erosion layer of ceramics " soft bottom " disperses impact of the water droplet to anti-water erosion layer surface during military service；
A certain amount of metal back layer powder is added in anti-water erosion layer, is sprayed using air plasma spraying technique, after the completion of spraying Coating in metal phase be filled with the aperture position in ceramic layer so that anti-water erosion layer is finer and close.
CN201910716609.1A 2019-08-05 2019-08-05 Water erosion protective coating for last-stage blade of steam turbine and preparation method thereof Active CN110423919B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001303904A (en) * 2000-04-24 2001-10-31 Mitsubishi Heavy Ind Ltd Gas turbine moving blade
US6398503B1 (en) * 1998-04-27 2002-06-04 Kabushiki Kaisha Toshiba High temperature component, gas turbine high temperature component and manufacturing method thereof
CN101566077A (en) * 2009-06-04 2009-10-28 湖南省湘电锅炉压力容器检验中心有限公司 Last stage vane of steam turbine and preparation method thereof
CN104385703A (en) * 2014-11-20 2015-03-04 西安交通大学 Composite gradient coating for repairing surface of vane and preparation method thereof
CN108754425A (en) * 2018-06-06 2018-11-06 西安交通大学 A kind of new waterproof erosion composite coating structure
CN108866470A (en) * 2018-06-19 2018-11-23 扬州睿德石油机械有限公司 A kind of preparation method of air plasma spraying alloy-ceramic laminar coating
CN110129729A (en) * 2019-06-28 2019-08-16 西北有色金属研究院 Nickel-base alloy surface NiCrAlY/NiCrAlY-YSZ/YSZ thermal barrier coating and preparation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6398503B1 (en) * 1998-04-27 2002-06-04 Kabushiki Kaisha Toshiba High temperature component, gas turbine high temperature component and manufacturing method thereof
JP2001303904A (en) * 2000-04-24 2001-10-31 Mitsubishi Heavy Ind Ltd Gas turbine moving blade
CN101566077A (en) * 2009-06-04 2009-10-28 湖南省湘电锅炉压力容器检验中心有限公司 Last stage vane of steam turbine and preparation method thereof
CN104385703A (en) * 2014-11-20 2015-03-04 西安交通大学 Composite gradient coating for repairing surface of vane and preparation method thereof
CN108754425A (en) * 2018-06-06 2018-11-06 西安交通大学 A kind of new waterproof erosion composite coating structure
CN108866470A (en) * 2018-06-19 2018-11-23 扬州睿德石油机械有限公司 A kind of preparation method of air plasma spraying alloy-ceramic laminar coating
CN110129729A (en) * 2019-06-28 2019-08-16 西北有色金属研究院 Nickel-base alloy surface NiCrAlY/NiCrAlY-YSZ/YSZ thermal barrier coating and preparation method thereof

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