CN109825794A - A kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating - Google Patents
A kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating Download PDFInfo
- Publication number
- CN109825794A CN109825794A CN201910154116.3A CN201910154116A CN109825794A CN 109825794 A CN109825794 A CN 109825794A CN 201910154116 A CN201910154116 A CN 201910154116A CN 109825794 A CN109825794 A CN 109825794A
- Authority
- CN
- China
- Prior art keywords
- parts
- self
- thermal barrier
- barrier coating
- compactness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Abstract
The present invention relates to a kind of preparation methods of self-healing mould assembly high-compactness thermal barrier coating, belong to technical field of coatings.Effective application of self-healing thermal barrier coating of the present invention is that the barrier to oxygen can be formed while filling crackle; after filling hydrotalcite composite material by titanium colloidal sol; it had not only had the performance of metal but also had had the performance of ceramics; under high temperature environment; self-healing coating can decompose and be formed coating film, and oxygen is prevented inwardly to spread, and protection matrix exempts from further to aoxidize; meanwhile the Rutile Type TiO of generation is aoxidized under high temperature2Crackle can be further filled up, healing effect is strengthened, so the thermal barrier coating of technical solution of the present invention preparation is effectively improved the compact texture and mechanical property of material.
Description
Technical field
The present invention relates to a kind of preparation methods of self-healing mould assembly high-compactness thermal barrier coating, belong to technical field of coatings.
Background technique
Coating technology plays a crucial role the development of contemporary industry.It is constantly mentioned as contemporary industry is horizontal
It rises, hundreds of coatings are developed.Its field applied includes anticorrosion, wear-resisting, anti-erosion, choke and thermal protection etc..Its
In, since thermal barrier coating can be on active service under high temperature environment, in industrial engine field and aerospace flight vehicle field
It is widely used.And aero-engine is then representative therein.
Need to further increase engine operation temperature in engine art in order to constantly improve the thermal efficiency of engine
It spends, develop advanced cooling technology.By taking plane as an example, nickel base superalloy is the structure of most common high-temperature unit of aircraft engine
Material.From the point of view of comparing the nearly development in 30 years of town based high-temperature alloy and the nearly 30 years demands of plane high-temperature component, development high temperature is depended merely on
Alloy technology is unable to satisfy growing plane growth requirement.Currently, high temperature alloy is needed in thermal protection technology and cooling skill
Under the protection of art, it is on active service with being lower than under conditions of about 100 DEG C of plane blade surface temperature；And in future, the temperature of the reduction is very
Higher than 200 DEG C.Therefore, if to develop next-generation plane engine, thermal barrier coating is as most common on plane high-temperature component
Thermal protection technology is needed by in-depth study and exploitation.
Thermal barrier coating is recorded from 20 to come out the eighties, has been subjected to significant progress so far.Currently, based on ceramic coating
Thermal barrier coating oneself widely approved.The current most common thermal insulation layer construction is three-decker, i.e., by adhesive layer, heat
Grown oxide layer and ceramic layer composition.The combination of coating and matrix surface has following two: the first is mechanical bond,
Collide the flat particle formed has certain uneven with matrix surface, and concave-convex surface is mutually twisted, and is formed mechanical
Pinning and combine；Second is metallurgy-chemical bonding, will generate smelting when coating and matrix surface appearance diffusion and alloying
Gold-chemical bonding.This combination method mainly generates intermetallic compound or solutionizing on faying face.In both knots
In conjunction, the coating of plasma spray coating is based on mechanical bond.The performance of coating and the matter of spraying parameter and spraying powder
It measures closely related.Spraying process influences very big, power is excessively high in spraying process, powder feeding is supplied gas speed and spraying on the performance of coating
Distance controlling is improper, substrate temperature control is bad can all make coating generate residual stress and influence coating life.Meanwhile it spraying and using
Powder-processed it is also quite important.
Thermotropic grown oxide layer (TGO) is the major source and diffusion admittance that coating crack generates, the undue growth of TGO
TGO/ adhesive layer and TGO/ ceramic layer interface can be made to assemble biggish residual stress, to generate transversal crack, this is to cause
The principal element that ceramic layer falls off.As thermal barrier coating is in practice using more and more extensive, work under high temperature environment
The coating adhesive layer of work is oxidizable, coating be easy cracking peel off have become limitation thermal barrier coating application stand in the breach ask
Topic.Coating porosity how is reduced, oxygen is stopped to diffuse into adhesive layer, the antioxygenic property for improving adhesive layer is that current thermal boundary applies
The important directions of layer research.Therefore, this project current thermal barrier coating there are aiming at the problem that: under hot environment, adhesive layer oxidation
Object growth, causes binding strength of coating poor, and coating life reduces, and is prepared for three kinds by the method for atmospheric plasma spraying
Self-healing thermal barrier coating, overcome existing thermal barrier coating there are the problem of.
A certain amount of self-healing mixture is added in TBCs, can effectively prevent the infiltration of oxygen by aoxidizing healed cracks,
The speed of growth for inhibiting TGO, improves the service life of coating.For all kinds of self-healing materials, ceramic material needs to pass through high temperature
Oxidation generates oxide to reach " healing " effect.The self-healing of ceramics should at least meet more following: (1) oxide generated
With good physical property, it can improve and restore substrate performance；(2) oxide generated does not have good physical
Can, but there is Volumetric expansion when oxidation, to fill up crackle and defect.Meet the self-healing agent material of above-mentioned performance requirement
There are SiC and Si at present3N4, SiO that they are generated in high-temperature oxidation process2It is good healing material, but in practical application ring
SiO in border2It can be reacted with vapor, generate volatile Si (OH)4, weaken the filling to crackle.And MoSi2With CrMoSi etc.
Although block materials can continue with certain self-healing capability, and after aoxidizing and ZrO2Reaction generates zirconium silicate, however it exists
Low temperature powder phenomenon-tion, that is, being not filled by crackle just has the deterioration of part consolidant mechanical property, to lose with host material in conjunction with energy
Power.So it is necessary to prepare a kind of efficient self-healing thermal barrier coating.
Summary of the invention
The technical problems to be solved by the invention: bad for current heat barrier coat material self-healing performance, there are low temperature
Powder phenomenon-tion, that is, being not filled by crackle just has the deterioration of part consolidant mechanical property, to lose binding ability with host material
Problem provides a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) according to parts by weight, weigh respectively 45~50 parts of deionized waters, 10~15 parts of aluminum nitrates, 6~8 parts of magnesium nitrates and 3~
5 parts of titanium chlorides are placed in a beaker, and are stirred and collect mixed solution, adjust pH to 8.5, are stirred and are collected to obtain alkalization
Liquid；
(2) in mass ratio 1: 10,15% sodium carbonate liquor of mass fraction is added dropwise in alkaline solution, after being added dropwise to complete, stirring
It mixes and insulation reaction crystallization, standing is cooled to room temperature, be centrifugated and collect lower sediment, lower sediment is modifiedly dry
Particle；
(3) according to parts by weight, deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate are weighed respectively be placed in triangle
In flask, it is stirred simultaneously insulation reaction, reaction solution liquid is collected and rotary evaporation must react revolving liquid, be aged to obtain aged gel liquid
Dry afterwards and the heating and thermal insulation calcining that heats up, standing are cooled to room temperature, grind and be sieved, obtain abrasive grains；
(4) take 45~50 parts mix yttrium zirconium oxide, 5~6 parts of modified particles, 6~8 parts of abrasive grains, 45~50 parts of ethyl alcohol and 15~
20 parts of 6% poly-vinyl alcohol solutions of mass fraction are placed in mortar, and grinding distribution simultaneously collects dispersion slurries, and dispersion slurries are placed in spray
In mist pelletizer, after the completion of to be spray dried, collect to mix pellet and carry out spray treatment with plasma spraying equipment, it is to be painted
After the completion of painting, the self-healing mould assembly high-compactness thermal barrier coating can be prepared into.
Adjusting pH to 8.5 described in step (1) is using 5% sodium hydroxide solution of mass fraction.
Sodium carbonate liquor drop rate described in step (2) is 2~3mL/min.
Insulation reaction crystallization temperature described in step (2) is 55~65 DEG C.
Ratio is by weight between deionized water described in step (3), lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate
Number meter is measured, weighs 45~50 parts of deionized waters, 1.0~1.5 parts of lanthanum nitrates, 2~3 parts of diammonium hydrogen phosphates, 3~5 parts of lemons respectively
Lemon acid and 1~2 part of gadolinium nitrate.
Rotary evaporation described in step (3) is that rotation is evaporated to the 1/2 of reaction solution volume at 45~55 DEG C, must react rotation
Steaming liquid.
The calcining of heating heating and thermal insulation described in step (3) to be warming up to 800~825 DEG C by 5 DEG C/min, heat preservation calcining 6~
8h。
It is 10~20 μm that yttrium zirconium oxide partial size is mixed described in step (4).
Spray drying step described in step (4) are as follows: dispersion slurries are placed in sponging granulator, control feed rate is
10mL/s, air inlet temperature are 150~155 DEG C, and air outlet temperature is 30~35 DEG C, and feeding disk rotating speed is 17000~18000r/
min。
Coating layer thickness described in step (4) is with a thickness of 1~2mm.
The present invention is compared with other methods, and advantageous effects are:
(1) technical solution of the present invention prepares titanium doped magnalium hydrotalcite using coprecipitation, using modified hydrotalcite as modified material,
Since addition composite material promotes the high temperature sintering of coating to a certain extent, increases its elasticity modulus, improve the stress of coating
Level fills crackle by volume expansion in oxidation process, but simultaneously by hydrotalcite composite material as self-healing material
In healing coating agglutination, a large amount of alumina particle is generated since material decomposes, improves the isolation capacity to oxygen；
(2) effective application of self-healing thermal barrier coating of the present invention is that the barrier to oxygen can be formed while filling crackle, leads to
After crossing titanium colloidal sol filling hydrotalcite composite material, not only there is the performance of metal but also there is the performance of ceramics, under high temperature environment,
Self-healing coating can decompose and be formed coating film, and oxygen is prevented inwardly to spread, and protection matrix exempts from further to aoxidize, meanwhile, high temperature
The Rutile Type TiO that lower oxidation generates2Crackle can be further filled up, strengthens healing effect, so technical solution of the present invention system
Standby thermal barrier coating is effectively improved the compact texture and mechanical property of material.
Technical solution of the present invention is filled material internal using earth La, due in crystalline material lattice structure
Vibration particle between average headway with temperature increase and increase, as the continuous raising crystal vibration of temperature gradually aggravates, in turn
Cause increasing accordingly for volume, at higher temperatures, intensifying for lattice vibration will be such that thermal expansion coefficient improves, with rare earth element
The thermal expansion coefficient of the increase of doping, composite ceramic material significantly improves, and the thermal expansion coefficient of material depends primarily on substance
The intensity of interior interatomic repulsion, gravitation size and chemical bond, any ion and oxygen form the intensity of chemical bond and the ion of R
Radius and atomic number are related, and the bond energy of rare earth element is reduced with the increase of atomic number；The biggish lanthanum member of thermal expansion coefficient
The doping of element also contributes the raising of sample thermal expansion coefficient, and thermal expansion coefficient in rising trend is with the reduction of ionic radius
Since thermal expansion depends on interatomic potential energy, thermal expansion coefficient is the asymmetry macroscopic result of potential well, so improving material
Thermal expansion coefficient advantageously reduce the residual stress generated due to the thermal mismatching of ceramic layer and metallic matrix in thermal barrier coating,
The cycle period and service life that can be improved coating improve the use duration of material.
Specific embodiment
According to parts by weight, 45~50 parts of deionized waters, 10~15 parts of aluminum nitrates, 6~8 parts of magnesium nitrates and 3 are weighed respectively
~5 parts of titanium chlorides are placed in a beaker, and are stirred and collect mixed solution, adjust pH to 8.5, are stirred and are collected to obtain alkalization
Liquid；In mass ratio 1: 10,15% sodium carbonate liquor of mass fraction is added dropwise in alkaline solution, after being added dropwise to complete, is stirred
And insulation reaction crystallization, standing are cooled to room temperature, and are centrifugated and collect lower sediment, by lower sediment it is dry modified
Grain；According to parts by weight, deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate are weighed respectively be placed in conical flask
In, it is stirred and insulation reaction, collects reaction solution liquid and rotary evaporation must react revolving liquid, be aged to do after aged gel liquid
Dry and the heating and thermal insulation calcining that heats up, standing are cooled to room temperature, grind and be sieved, obtain abrasive grains；45~50 parts are taken to mix yttrium oxidation
Zirconium, 5~6 parts of modified particles, 6~8 parts of abrasive grains, 45~50 parts of ethyl alcohol and 15~20 parts of 6% polyvinyl alcohol of mass fraction are molten
Liquid is placed in mortar, and grinding distribution simultaneously collects dispersion slurries, dispersion slurries is placed in sponging granulator, completion to be spray dried
Afterwards, collect mixing and carries out spray treatment with plasma spraying equipment at pellet, after the completion of to be sprayed, can be prepared into described in
Self-healing mould assembly high-compactness thermal barrier coating；PH to 8.5 is wherein adjusted using 5% sodium hydroxide solution of mass fraction；Wherein
Sodium carbonate liquor drop rate is 2~3mL/min；Wherein insulation reaction crystallization temperature is 55~65 DEG C；Wherein deionized water, nitre
Ratio is according to parts by weight, to weigh 45~50 parts of deionizations respectively between sour lanthanum, diammonium hydrogen phosphate, citric acid and gadolinium nitrate
Water, 1.0~1.5 parts of lanthanum nitrates, 2~3 parts of diammonium hydrogen phosphates, 3~5 parts of citric acids and 1~2 part of gadolinium nitrate；Wherein rotary evaporation
It is evaporated to the 1/2 of reaction solution volume to rotate at 45~55 DEG C, revolving liquid must be reacted；Wherein heating heating and thermal insulation calcining for by
5 DEG C/min is warming up to 800~825 DEG C, 6~8h of heat preservation calcining；Wherein mixing yttrium zirconium oxide partial size is 10~20 μm；Wherein do by spraying
Dry step are as follows: dispersion slurries are placed in sponging granulator, control feed rate is 10mL/s, and air inlet temperature is 150~155
DEG C, air outlet temperature is 30~35 DEG C, and feeding disk rotating speed is 17000~18000r/min；Its coating thickness be with a thickness of 1~
2mm。
According to parts by weight, 45 parts of deionized waters, 10 parts of aluminum nitrates, 6 parts of magnesium nitrates and 3 parts of titanium chlorides are weighed respectively to be placed in
In beaker, it is stirred and is collected mixed solution, pH to 8.5 is adjusted, is stirred and collects to obtain alkaline solution；In mass ratio 1:
10,15% sodium carbonate liquor of mass fraction is added dropwise in alkaline solution, after being added dropwise to complete, is stirred and insulation reaction is brilliant
Change, standing is cooled to room temperature, be centrifugated and collect lower sediment, by lower sediment it is dry modified particles；In parts by weight
Meter weighs deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate respectively and is placed in conical flask, is stirred simultaneously
Insulation reaction, revolving liquid must be reacted by collecting reaction solution liquid and rotary evaporation, be aged to dry after aged gel liquid and the heating that heats up
Heat preservation calcining, standing are cooled to room temperature, grind and be sieved, obtain abrasive grains；45 parts are taken to mix yttrium zirconium oxide, 5 parts of modified particles, 6
Part abrasive grains, 45 parts of ethyl alcohol and 15 parts of 6% poly-vinyl alcohol solutions of mass fraction are placed in mortar, and grinding distribution simultaneously collects dispersion
Dispersion slurries are placed in sponging granulator by slurries, after the completion of to be spray dried, collected to mix pellet and are used plasma spraying
Equipment carries out spray treatment, after the completion of to be sprayed, can be prepared into the self-healing mould assembly high-compactness thermal barrier coating；Wherein adjust
PH to 8.5 is saved using 5% sodium hydroxide solution of mass fraction；Wherein sodium carbonate liquor drop rate is 2mL/min；Wherein
Insulation reaction crystallization temperature is 55 DEG C；Wherein ratio between deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate
For according to parts by weight, 45 parts of deionized waters, 1.0 parts of lanthanum nitrates, 2 parts of diammonium hydrogen phosphates, 3 parts of citric acids and 1 part are weighed respectively
Gadolinium nitrate；Wherein rotary evaporation is that rotation is evaporated to the 1/2 of reaction solution volume at 45 DEG C, must react revolving liquid；Wherein heat up
Heating and thermal insulation calcining is is warming up to 800 DEG C by 5 DEG C/min, 6~8h of heat preservation calcining；Wherein mixing yttrium zirconium oxide partial size is 10 μm；Its
Middle spray drying step are as follows: dispersion slurries are placed in sponging granulator, control feed rate is 10mL/s, and air inlet temperature is
150 DEG C, air outlet temperature is 30 DEG C, and feeding disk rotating speed is 17000r/min；Its coating thickness is with a thickness of 1mm.
According to parts by weight, 47 parts of deionized waters, 12 parts of aluminum nitrates, 7 parts of magnesium nitrates and 4 parts of titanium chlorides are weighed respectively to be placed in
In beaker, it is stirred and is collected mixed solution, pH to 8.5 is adjusted, is stirred and collects to obtain alkaline solution；In mass ratio 1:
10,15% sodium carbonate liquor of mass fraction is added dropwise in alkaline solution, after being added dropwise to complete, is stirred and insulation reaction is brilliant
Change, standing is cooled to room temperature, be centrifugated and collect lower sediment, by lower sediment it is dry modified particles；In parts by weight
Meter weighs deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate respectively and is placed in conical flask, is stirred simultaneously
Insulation reaction, revolving liquid must be reacted by collecting reaction solution liquid and rotary evaporation, be aged to dry after aged gel liquid and the heating that heats up
Heat preservation calcining, standing are cooled to room temperature, grind and be sieved, obtain abrasive grains；47 parts are taken to mix yttrium zirconium oxide, 5 parts of modified particles, 7
Part abrasive grains, 47 parts of ethyl alcohol and 17 parts of 6% poly-vinyl alcohol solutions of mass fraction are placed in mortar, and grinding distribution simultaneously collects dispersion
Dispersion slurries are placed in sponging granulator by slurries, after the completion of to be spray dried, collected to mix pellet and are used plasma spraying
Equipment carries out spray treatment, after the completion of to be sprayed, can be prepared into the self-healing mould assembly high-compactness thermal barrier coating；Wherein adjust
PH to 8.5 is saved using 5% sodium hydroxide solution of mass fraction；Wherein sodium carbonate liquor drop rate is 2mL/min；Wherein
Insulation reaction crystallization temperature is 60 DEG C；Wherein ratio between deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate
For according to parts by weight, 47 parts of deionized waters, 1.2 parts of lanthanum nitrates, 2 parts of diammonium hydrogen phosphates, 4 parts of citric acids and 1 part are weighed respectively
Gadolinium nitrate；Wherein rotary evaporation is that rotation is evaporated to the 1/2 of reaction solution volume at 47 DEG C, must react revolving liquid；Wherein heat up
Heating and thermal insulation calcining is is warming up to 817 DEG C by 5 DEG C/min, heat preservation calcining 7h；Wherein mixing yttrium zirconium oxide partial size is 15 μm；Wherein spray
Mist drying steps are as follows: dispersion slurries are placed in sponging granulator, control feed rate is 10mL/s, air inlet temperature 152
DEG C, air outlet temperature is 32 DEG C, and feeding disk rotating speed is 17500r/min；Its coating thickness is with a thickness of 2mm.
According to parts by weight, 49 parts of deionized waters, 14 parts of aluminum nitrates, 7 parts of magnesium nitrates and 4 parts of titanium chlorides are weighed respectively to be placed in
In beaker, it is stirred and is collected mixed solution, pH to 8.5 is adjusted, is stirred and collects to obtain alkaline solution；In mass ratio 1:
10,15% sodium carbonate liquor of mass fraction is added dropwise in alkaline solution, after being added dropwise to complete, is stirred and insulation reaction is brilliant
Change, standing is cooled to room temperature, be centrifugated and collect lower sediment, by lower sediment it is dry modified particles；In parts by weight
Meter weighs deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate respectively and is placed in conical flask, is stirred simultaneously
Insulation reaction, revolving liquid must be reacted by collecting reaction solution liquid and rotary evaporation, be aged to dry after aged gel liquid and the heating that heats up
Heat preservation calcining, standing are cooled to room temperature, grind and be sieved, obtain abrasive grains；49 parts are taken to mix yttrium zirconium oxide, 6 parts of modified particles, 7
Part abrasive grains, 49 parts of ethyl alcohol and 19 parts of 6% poly-vinyl alcohol solutions of mass fraction are placed in mortar, and grinding distribution simultaneously collects dispersion
Dispersion slurries are placed in sponging granulator by slurries, after the completion of to be spray dried, collected to mix pellet and are used plasma spraying
Equipment carries out spray treatment, after the completion of to be sprayed, can be prepared into the self-healing mould assembly high-compactness thermal barrier coating；Wherein adjust
PH to 8.5 is saved using 5% sodium hydroxide solution of mass fraction；Wherein sodium carbonate liquor drop rate is 3mL/min；Wherein
Insulation reaction crystallization temperature is 62 DEG C；Wherein ratio between deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate
For according to parts by weight, 49 parts of deionized waters, 1.4 parts of lanthanum nitrates, 3 parts of diammonium hydrogen phosphates, 4 parts of citric acids and 2 parts are weighed respectively
Gadolinium nitrate；Wherein rotary evaporation is that rotation is evaporated to the 1/2 of reaction solution volume at 53 DEG C, must react revolving liquid；Wherein heat up
Heating and thermal insulation calcining is is warming up to 822 DEG C by 5 DEG C/min, heat preservation calcining 7h；Wherein mixing yttrium zirconium oxide partial size is 18 μm；Wherein spray
Mist drying steps are as follows: dispersion slurries are placed in sponging granulator, control feed rate is 10mL/s, air inlet temperature 154
DEG C, air outlet temperature is 34 DEG C, and feeding disk rotating speed is 17800r/min；Its coating thickness is with a thickness of 2mm.
According to parts by weight, 50 parts of deionized waters, 15 parts of aluminum nitrates, 8 parts of magnesium nitrates and 5 parts of titanium chlorides are weighed respectively to be placed in
In beaker, it is stirred and is collected mixed solution, pH to 8.5 is adjusted, is stirred and collects to obtain alkaline solution；In mass ratio 1:
10,15% sodium carbonate liquor of mass fraction is added dropwise in alkaline solution, after being added dropwise to complete, is stirred and insulation reaction is brilliant
Change, standing is cooled to room temperature, be centrifugated and collect lower sediment, by lower sediment it is dry modified particles；In parts by weight
Meter weighs deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate respectively and is placed in conical flask, is stirred simultaneously
Insulation reaction, revolving liquid must be reacted by collecting reaction solution liquid and rotary evaporation, be aged to dry after aged gel liquid and the heating that heats up
Heat preservation calcining, standing are cooled to room temperature, grind and be sieved, obtain abrasive grains；50 parts are taken to mix yttrium zirconium oxide, 6 parts of modified particles, 8
Dispersion slurries are placed in sponging granulator, after the completion of to be spray dried, collect to obtain mangcorn by part abrasive grains, dispersion slurries
Expect and carry out spray treatment with plasma spraying equipment, after the completion of to be sprayed, it is high-densit that the self-healing mould assembly can be prepared into
Spend thermal barrier coating；PH to 8.5 is wherein adjusted using 5% sodium hydroxide solution of mass fraction；Wherein sodium carbonate liquor is added dropwise
Rate is 3mL/min；Wherein insulation reaction crystallization temperature is 65 DEG C；Wherein deionized water, lanthanum nitrate, diammonium hydrogen phosphate, lemon
Ratio is according to parts by weight, to weigh 50 parts of deionized waters, 1.5 parts of lanthanum nitrates, 3 parts of phosphoric acid hydrogen two respectively between acid and gadolinium nitrate
Ammonium, 5 parts of citric acids and 2 parts of gadolinium nitrates；Wherein rotary evaporation is that rotation is evaporated to the 1/2 of reaction solution volume at 55 DEG C, is obtained instead
Liquid should be rotated；Wherein the calcining of heating heating and thermal insulation is is warming up to 825 DEG C by 5 DEG C/min, heat preservation calcining 8h；Wherein mix yttrium zirconium oxide
Partial size is 20 μm；Wherein spray drying step are as follows: dispersion slurries are placed in sponging granulator, control feed rate is 10mL/
S, air inlet temperature are 155 DEG C, and air outlet temperature is 35 DEG C, and feeding disk rotating speed is 18000r/min；Its coating thickness is thickness
Degree is 2mm.
Example 1,2,3 prepared by the present invention and comparative example are detected, specific testing result such as following table table 1:
1 properties of product of table characterize table
The present invention prepares thermal barrier coating with excellent resistance to heat shocks energy as shown in Table 1.
Claims (10)
1. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating, it is characterised in that specific preparation step are as follows:
(1) according to parts by weight, weigh respectively 45~50 parts of deionized waters, 10~15 parts of aluminum nitrates, 6~8 parts of magnesium nitrates and 3~
5 parts of titanium chlorides are placed in a beaker, and are stirred and collect mixed solution, adjust pH to 8.5, are stirred and are collected to obtain alkalization
Liquid；
(2) in mass ratio 1: 10,15% sodium carbonate liquor of mass fraction is added dropwise in alkaline solution, after being added dropwise to complete, stirring
It mixes and insulation reaction crystallization, standing is cooled to room temperature, be centrifugated and collect lower sediment, lower sediment is modifiedly dry
Particle；
(3) according to parts by weight, deionized water, lanthanum nitrate, diammonium hydrogen phosphate, citric acid and gadolinium nitrate are weighed respectively be placed in triangle
In flask, it is stirred simultaneously insulation reaction, reaction solution liquid is collected and rotary evaporation must react revolving liquid, be aged to obtain aged gel liquid
Dry afterwards and the heating and thermal insulation calcining that heats up, standing are cooled to room temperature, grind and be sieved, obtain abrasive grains；
(4) take 45~50 parts mix yttrium zirconium oxide, 5~6 parts of modified particles, 6~8 parts of abrasive grains, 45~50 parts of ethyl alcohol and 15~
20 parts of 6% poly-vinyl alcohol solutions of mass fraction are placed in mortar, and grinding distribution simultaneously collects dispersion slurries, and dispersion slurries are placed in spray
In mist pelletizer, after the completion of to be spray dried, collect to mix pellet and carry out spray treatment with plasma spraying equipment, it is to be painted
After the completion of painting, the self-healing mould assembly high-compactness thermal barrier coating can be prepared into.
2. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating according to claim 1, it is characterised in that: step
Suddenly adjusting pH to 8.5 described in (1) is using 5% sodium hydroxide solution of mass fraction.
3. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating according to claim 1, it is characterised in that: step
Suddenly sodium carbonate liquor drop rate described in (2) is 2~3mL/min.
4. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating according to claim 1, it is characterised in that: step
Suddenly insulation reaction crystallization temperature described in (2) is 55~65 DEG C.
5. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating according to claim 1, it is characterised in that: step
Suddenly ratio is according to parts by weight, to divide between deionized water, lanthanum nitrate described in (3), diammonium hydrogen phosphate, citric acid and gadolinium nitrate
Also known as 45~50 parts of deionized waters of amount, 1.0~1.5 parts of lanthanum nitrates, 2~3 parts of diammonium hydrogen phosphates, 3~5 parts of citric acids and 1~2 part
Gadolinium nitrate.
6. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating according to claim 1, it is characterised in that: step
Suddenly rotary evaporation described in (3) is that rotation is evaporated to the 1/2 of reaction solution volume at 45~55 DEG C, must react revolving liquid.
7. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating according to claim 1, it is characterised in that: step
Suddenly the calcining of heating heating and thermal insulation described in (3) is is warming up to 800~825 DEG C by 5 DEG C/min, 6~8h of heat preservation calcining.
8. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating according to claim 1, it is characterised in that: step
Suddenly it is 10~20 μm that yttrium zirconium oxide partial size is mixed described in (4).
9. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating according to claim 1, it is characterised in that: step
Suddenly spray drying step described in (4) are as follows: dispersion slurries are placed in sponging granulator, control feed rate is 10mL/s, into
Port temperature is 150~155 DEG C, and air outlet temperature is 30~35 DEG C, and feeding disk rotating speed is 17000~18000r/min.
10. a kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating according to claim 1, it is characterised in that:
Coating layer thickness described in step (4) is with a thickness of 1~2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154116.3A CN109825794A (en) | 2019-03-01 | 2019-03-01 | A kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154116.3A CN109825794A (en) | 2019-03-01 | 2019-03-01 | A kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109825794A true CN109825794A (en) | 2019-05-31 |
Family
ID=66865039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910154116.3A Withdrawn CN109825794A (en) | 2019-03-01 | 2019-03-01 | A kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109825794A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347617A (en) * | 2021-03-15 | 2022-04-15 | 四川汇利实业有限公司 | Self-repairing PET-AL-PE composite film for flexible package and preparation method thereof |
| CN114405797A (en) * | 2021-12-21 | 2022-04-29 | 苏州大学 | Graphene coating based on liquid material plasma spraying technology and spraying process thereof |
-
2019
- 2019-03-01 CN CN201910154116.3A patent/CN109825794A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347617A (en) * | 2021-03-15 | 2022-04-15 | 四川汇利实业有限公司 | Self-repairing PET-AL-PE composite film for flexible package and preparation method thereof |
| CN114405797A (en) * | 2021-12-21 | 2022-04-29 | 苏州大学 | Graphene coating based on liquid material plasma spraying technology and spraying process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11549169B2 (en) | Method for fabricating thermal barrier coating having self-repair and temperature-sensitive functions | |
| CN106588021B (en) | A kind of silicon carbide ceramics and preparation method thereof | |
| CN110002872A (en) | A kind of rare earth tantalic acid ytterbium ceramics and preparation method thereof of anti-low melting point oxide corrosion | |
| CN102070335B (en) | Pyrochlore structural rare-earth zirconate material and preparation method and application thereof | |
| CN111850454B (en) | CMAS erosion resistant thermal barrier coating and preparation method thereof | |
| CN106676487B (en) | A kind of zinc oxide-based ceramic sputtering target material and its preparation method and application | |
| CN106588004B (en) | A kind of pure phase rare earth zirconate nano material and preparation method thereof | |
| CN105039894B (en) | A kind of anti-CMAS ceramic layer and its slurry process preparation method | |
| CN109825794A (en) | A kind of preparation method of self-healing mould assembly high-compactness thermal barrier coating | |
| CN110002870A (en) | A kind of rare earth tantalate ceramics and preparation method thereof of anti-low melting point oxide corrosion | |
| CN103013190A (en) | Novel special inorganic hole-sealing agent for thermal-spraying coating as well as preparation method and application for same | |
| CN107585786B (en) | Tri- rare earth ion tantalates of Sm-Gd-Dy and the preparation method and application thereof | |
| CN109554707A (en) | A kind of ultralimit aluminium alloy and preparation method thereof | |
| CN109942294A (en) | A kind of rare earth samarium tantalate ceramics of different stoichiometric ratios and preparation method thereof of anti-low melting point oxide corrosion | |
| CN103469144B (en) | A kind of high porosity and there is the thermal barrier coating of isometric crystal structure | |
| CN109487196A (en) | A kind of ultralimit nickel alloy and preparation method thereof | |
| CN102627405B (en) | Microcrystal glass coating applied to nickel based alloy surface and preparation method thereof | |
| CN103693956B (en) | Preparation method of YSZ-LSM composite thermal barrier coating material | |
| CN101078117A (en) | Method for preparing heat barrier coating with column form crystal structure ceramic layer | |
| CN111508676A (en) | Small-size distribution network annular zinc oxide resistance card and preparation method thereof | |
| CN101767987A (en) | Yttrium erbium aluminate powder for thermal barrier coating ceramic layer and preparation method thereof | |
| CN102167512B (en) | Silicon carbide-doped glass-ceramic coating for titanium alloy | |
| CN107662947B (en) | Tri- rare earth ion tantalates of Sm-Eu-Gd and the preparation method and application thereof | |
| CN1186129C (en) | Anti-oxidation composite coating of plane carbon brake disc and its preparing method | |
| CN113862599B (en) | Al 2 O 3 -GdAlO 3 Amorphous oxide ceramic coating and method for preparing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190531 |
|
| WW01 | Invention patent application withdrawn after publication |