CN103866224A - Method for preparing insulation anti-adhesion coating by using plasma spray-coating technology - Google Patents
Method for preparing insulation anti-adhesion coating by using plasma spray-coating technology Download PDFInfo
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- CN103866224A CN103866224A CN201210530161.2A CN201210530161A CN103866224A CN 103866224 A CN103866224 A CN 103866224A CN 201210530161 A CN201210530161 A CN 201210530161A CN 103866224 A CN103866224 A CN 103866224A
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Abstract
The invention belongs to the technical field of ceramic protection coating preparation, and specifically relates to a method for preparing an insulation anti-adhesion coating by using a plasma spray-coating technology. The method comprises: 1, pre-treating a substrate; 2, preparing an adhesion layer material and a ceramic layer material; 3, carrying out spray-coating of the adhesion layer; and 4, carrying out spray-coating of the ceramic layer. With the method, the technical problems that the existing insulation coating in the prior art can not concurrently have good mechanical property and electrical insulation property, and can not be provided for well avoiding the material adhesion during the fusion reaction process are solved; and the insulation anti-adhesion coating is formed on the large area metal surface in one time through the plasma spray-coating technology, such that formed coating has characteristics of high temperature resistance, thermal insulation and good chemical stability so as to achieve good combination between the ceramic coating and the metal substrate material.
Description
Technical field
The invention belongs to the preparing technical field of ceramic protective coating, be specifically related to a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating.
Background technology
In fusion reaction pile assembly due to the existence of the resistance of conductor own, inductive loop in conductor also will produce joule heating simultaneously, especially can be fairly obvious for this heating phenomena in the larger material of resistivity, make material reach rapidly very high temperature, even can cause microcell fusing that material is interlocked, cause structural part to lose efficacy.Therefore, certain thickness high temperature resistant, heat insulation and have both the multi-functional coatings of good mechanical property and electric property feature in fusion reactor structural part surface-coated, can ensure that this structural part is on active service for a long time in fusion reactor.
At present, in view of adhesive property, the cure shrinkage of polymer matrix composites excellence is little, the feature such as good manufacturability, good electrical property and good stability, make it be widely used in fusion reactor structural part surface as insulating coating.But, inevitably there is the feature of the mechanical property deficiencies such as crisp, the not shock-resistant and stress cracking of matter in polymer matrix composites, and there is anisotropy in its resistivity, increase the complicacy of installation and use procedure, made it cannot meet the higher demand that fusion reactor development proposes insulating coating.
Therefore, find the technology in the anti-interlock coating of fusion reactor supporting structure surface preparation insulation more easily, make the coating of preparation have both good mechanical property and electrical insulation capability feature, prevent generating material scuffing in fusion reaction process, and can prepare once the ceramic coating with the anti-interlock of insulation on large-area metal surface, be one of this area problem demanding prompt solution.
Summary of the invention
The technical issues that need to address of the present invention are: insulating coating of the prior art, be difficult to have both good mechanical property and electrical insulating property, and cannot avoid preferably the material scuffing occurring in fusion reaction process.
Technical scheme of the present invention is as described below:
A method that adopts plasma spraying technology to prepare to insulate anti-interlock coating, comprises the following steps: the pre-treatment of step 1 base material; Step 2 is prepared bonding layer material, ceramic layer material; Step 3 sprays tack coat; The ceramic coated layer of step 4.
Step 1 specifically comprises the following steps: metallic substrate surface is carried out to degreasing processing; Ultrasonic cleaning; And dehydrate.
As preferred version, step 1 can also be: cutting metal base material; Metallic substrate surface is carried out to degreasing processing, ultrasonic cleaning, and dehydrate; Sandblasting.
In step 1, metal base can be 316LN stainless material; Can adopt acetone to carry out degreasing processing; Can adopt dehydrated alcohol to carry out ultrasonic cleaning; The processing parameter of described sandblasting can be: sand grains adopts brown corundum, blasting pressure 0.4-0.6MPa, sandblast time 20-100s.
In step 2, bonding layer material adopts 316LN stainless steel or NiAl Al contained Ni end, and powder diameter is preferably between 15-45 μ m; Ceramic layer material adopts Al
2o
3-TiO
2composite powder, Al
2o
3, TiO
2mass ratio can be 97:3, powder diameter is preferably between 22.5-45 μ m.
In step 3, controlling base material temperature can be 100-200 DEG C, adopts plasma spraying technology spraying tack coat; In step 4, controlling base material temperature can be 100-200 DEG C, adopts the ceramic coated layer of plasma spraying technology.
In step 3, the working parameter of spraying tack coat can be: arc voltage 65-75V, flame current 580-620A, Ar flow 40-50L/min, H
2flow 5-8L/min, spray distance is 80-120mm, powder sending quantity 10-20g/min; Tack coat coating thickness can be 50-100 μ m;
In step 4, the working parameter of ceramic coated layer can be: arc voltage 65-75V, flame current 600-630A, Ar flow 35-45L/min, H
2flow 10-15L/min, spray distance is 100-150mm, powder sending quantity 25-35g/min; Ceramic layer thickness can be 250-350 μ m.
In step 3, step 4, preferably adopt pressurized air blast-cold mode but to carry out cooling process to base material, the flow of cooling gas can be 100-1000L/min.
Beneficial effect of the present invention is:
(1) employing plasma spraying technology of the present invention is prepared the method for the anti-interlock coating that insulate, and forms the anti-interlock coating of insulation by plasma spraying technology is disposable on large-area metal surface, and economical convenient, the long lifetime that is conducive to implementation structure part is used;
(2) employing plasma spraying technology of the present invention is prepared the method for the anti-interlock coating that insulate, there is good thermal shock resistance and electrical insulation capability, and coating high temperature resistant, heat insulation, chemical stability is good, can realize the good combination between ceramic coating and metal base material, give full play to the advantage of ceramic coating;
(3) employing plasma spraying technology of the present invention is prepared the method for the anti-interlock coating that insulate, and adopts plasma spray coating process, easy to operate, cost is low, can carry out big area operation, meets thickness requirement; High with the cost of existing chemical vapour deposition technique, deposited coatings thin thickness is compared, and cost of the present invention is low, can prepare thickness and reach the ceramic coating of 1mm;
(4) employing plasma spraying technology of the present invention is prepared the method for the anti-interlock coating that insulate, and when deposited ceramic layer, by adjusting the power of spray gun, has guaranteed more α-Al in ceramic coating
2o
3the existence of stable phase, reduces the γ-Al in coating
2o
3the appearance of metastable phase;
(5) employing plasma spraying technology of the present invention is prepared the method for the anti-interlock coating that insulate, in the time of deposited ceramic layer, the base material that contains tack coat is carried out to preheating certain temperature, prevent that powder from, to arrive when tack coat speed of cooling too fast and cause unrelieved stress soaring, having improved the bonding force of coating inside;
(6) employing plasma spraying technology of the present invention is prepared the method for the anti-interlock coating that insulate, and adopts aluminum oxide as ceramic coating material, and its dielectric properties are good, and reliability is strong.The volume specific resistance of the prepared aluminum oxide coating layer of the present invention is 5.0 × 10
9-8.5 × 10
9Ω m, dielectric breakdown strength >10kV/mm;
(7) employing plasma spraying technology of the present invention is prepared the method for the anti-interlock coating that insulate, the thermal shock resistance of coating is good: in ceramic layer prepared by the present invention, have hole, there is obvious effect in this space to the unrelieved stress in release coat, is beneficial to the thermal shock resistance that improves ceramic coating;
(8) employing plasma spraying technology of the present invention is prepared the method for the anti-interlock coating that insulate, unrelieved stress in coating reduces, coating has good bonding strength: the present invention, by the transition of 316LN stainless steel or NiAl (nickel alclad) tack coat, can be alleviated the unrelieved stress by thermal expansion coefficient difference causes between aluminum oxide and base material.
Brief description of the drawings
Fig. 1 is the principle schematic that the present invention adopts plasma spraying technology to prepare to insulate the plasma spray system of the method for anti-interlock coating.
Embodiment
The method of employing plasma spraying technology of the present invention being prepared to the anti-interlock coating that insulate below in conjunction with drawings and Examples is elaborated.
Employing plasma spraying technology of the present invention is prepared the method for the anti-interlock coating that insulate, and comprises the following steps:
The pre-treatment of step 1 base material
Metallic substrate surface is carried out to degreasing processing, ultrasonic cleaning, and dehydrate.
Described metal base can be 316LN stainless material.
As preferred version: before degreasing is processed, can be by fixing specification cutting metal base material; Adopt acetone to carry out degreasing processing; Adopt dehydrated alcohol to carry out ultrasonic cleaning.
In addition,, as further preferred version, in step 1, after dehydrating, carry out sandblasting with sandblast machine effects on surface, to improve the bonding strength of plasma spraying coating and base material.Particularly, the processing parameter of sandblasting is: sand grains adopts 46
#(main component is Al to palm fibre corundum
2o
3), blasting pressure 0.4-0.6MPa, sandblast time 20-100s.
Step 2 is prepared bonding layer material, ceramic layer material
Bonding layer material adopts 316LN stainless steel or NiAl Al contained Ni end, and its powder diameter is all between 15-45 μ m;
Ceramic layer material adopts Al
2o
3-TiO
2composite powder, wherein, Al
2o
3, TiO
2mass ratio be 97:3, powder diameter is between 22.5-45 μ m.
Step 3 sprays tack coat
Control base material temperature is 100-200 DEG C, adopts plasma spraying technology spraying tack coat, and adhesive layer thickness is 50-100 μ m.The working parameter of spraying tack coat is: arc voltage 65-75V, flame current 580-620A, Ar flow 40-50L/min, H
2flow 5-8L/min, spray distance is 80-120mm, powder sending quantity 10-20g/min.
In spraying process, can adopt pressurized air blast-cold mode but to carry out cooling process to base material, the flow of cooling gas be preferably 100-1000L/min.
The ceramic coated layer of step 4
Control base material temperature is 100-200 DEG C, adopts the ceramic coated layer of plasma spraying technology, and ceramic layer thickness is 250-350 μ m.The working parameter of ceramic coated layer is: arc voltage 65-75V, flame current 600-630A, Ar flow 35-45L/min, H
2flow 10-15L/min, spray distance is 100-150mm, powder sending quantity 25-35g/min.
In spraying process, can adopt pressurized air blast-cold mode but to carry out cooling process to base material, the flow of cooling gas be preferably 100-1000L/min.
Embodiment 1
Selecting commercially available 316LN stainless steel is substrate material, and specimen size is 20mm × 30mm × 10mm, sprayed surface is carried out to degreasing processing with acetone, dehydrated alcohol ultrasonic cleaning, dehydrate, finally carry out sandblasting with sandblast machine effects on surface, make surface roughness Ra reach 3.5 μ m.Adopt plasma spraying equipment MF-P1000 to spray, the anti-interlock coating of insulation of preparation comprises two parts: tack coat and the dielectric ceramic layer as surface layer, tack coat adopts 316LN powder of stainless steel, Al
2o
3-3TiO
2for ceramic layer, control base material temperature is 100-200 DEG C, and the processing parameter of its plasma spraying is in table 1:
Table 1 embodiment 1 plasma spray coating process parameter
| Processing parameter | 316LN stainless steel | Al 2O 3-3TiO 2 |
| Voltage | 66V | 68V |
| Electric current | 600A | 630A |
| Ar flow | 45L/min | 40L/min |
| H 2Flow | 6L/min | 11L/min |
| Spray distance | 100mm | 120mm |
| Powder sending quantity | 15g/min | 30g/min |
| Adhesive layer thickness | 50-100μm | 250-350μm |
Warp.
Embodiment 2
Selecting commercially available 316LN stainless steel is substrate material, and specimen size is 20mm × 30mm × 10mm, sprayed surface is carried out to degreasing processing with acetone, dehydrated alcohol ultrasonic cleaning, dehydrate, finally carry out sandblasting with sandblast machine effects on surface, make surface roughness Ra reach 3.5 μ m.Adopt plasma spraying equipment MF-P1000 to spray, the anti-interlock coating of insulation of preparation comprises two parts: tack coat and the dielectric ceramic layer as surface layer, tack coat adopts NiAl (nickel alclad) powder, Al
2o
3-3TiO
2for ceramic layer, control base material temperature for being less than 200 DEG C, the processing parameter of its plasma spraying is in table 2:
Table 2 embodiment 2 plasma spray coating process parameters
| Processing parameter | NiAl (nickel alclad) | Al 2O 3-3TiO 2 |
| Voltage | 66V | 68V |
| Electric current | 600A | 630A |
| Ar flow | 45L/min | 40L/min |
| H 2Flow | 6L/min | 11L/min |
| Spray distance | 100mm | 120mm |
| Powder sending quantity | 15g/min | 30g/min |
| Adhesive layer thickness | 50-100μm | 250-350μm |
Embodiment 3
Selecting commercially available 316LN stainless steel is substrate material, and specimen size is 20mm × 30mm × 10mm, sprayed surface is carried out to degreasing processing with acetone, dehydrated alcohol ultrasonic cleaning, dehydrate, finally carry out sandblasting with sandblast machine effects on surface, make surface roughness Ra reach 3.5 μ m.Adopt plasma spraying equipment MF-P1000 to spray, the anti-interlock coating of insulation of preparation comprises two parts: tack coat and the dielectric ceramic layer as surface layer, tack coat adopts 316LN powder of stainless steel, Al
2o
3-3TiO
2for ceramic layer, control base material temperature for being less than 200 DEG C, the processing parameter of its plasma spraying is in table 3:
Table 3 embodiment 3 plasma spray coating process parameters
| Processing parameter | 316LN stainless steel | Al 2O 3-3TiO 2 |
| Voltage | 66V | 68V |
| Electric current | 600A | 630A |
| Ar flow | 45L/min | 40L/min |
| H 2Flow | 6L/min | 11L/min |
| Spray distance | 100mm | 120mm |
| Powder sending quantity | 15g/min | 30g/min |
| Adhesive layer thickness | 50-100μm | 250-350μm |
Claims (10)
1. a method that adopts plasma spraying technology to prepare to insulate anti-interlock coating, is characterized in that: comprise the following steps:
The pre-treatment of step 1 base material;
Step 2 is prepared bonding layer material, ceramic layer material;
Step 3 sprays tack coat;
The ceramic coated layer of step 4.
2. a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating according to claim 1, is characterized in that:
Step 1 specifically comprises the following steps:
Metallic substrate surface is carried out to degreasing processing; Ultrasonic cleaning; And dehydrate.
3. a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating according to claim 2, is characterized in that:
Step 1 specifically comprises the following steps:
Cutting metal base material; Metallic substrate surface is carried out to degreasing processing, ultrasonic cleaning, and dehydrate; Sandblasting.
4. a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating according to claim 3, is characterized in that:
In step 1,
Metal base is 316LN stainless material;
Adopt acetone to carry out degreasing processing;
Adopt dehydrated alcohol to carry out ultrasonic cleaning;
The processing parameter of described sandblasting is: sand grains adopts brown corundum, blasting pressure 0.4-0.6MPa, sandblast time 20-100s.
5. a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating according to claim 1 and 2, is characterized in that:
In step 2,
Bonding layer material adopts 316LN stainless steel or NiAl Al contained Ni end; Ceramic layer material adopts Al
2o
3-TiO
2composite powder.
6. a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating according to claim 5, is characterized in that:
In step 2, the powder diameter of bonding layer material is between 15-45 μ m; In ceramic layer material, Al
2o
3, TiO
2mass ratio be 97:3, powder diameter is between 22.5-45 μ m.
7. a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating according to claim 1 and 2, is characterized in that:
In step 3, control base material temperature is 100-200 DEG C, adopts plasma spraying technology spraying tack coat; In step 4, control base material temperature is 100-200 DEG C, adopts the ceramic coated layer of plasma spraying technology.
8. a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating according to claim 7, is characterized in that:
In step 3, the working parameter of spraying tack coat is: arc voltage 65-75V, flame current 580-620A, Ar flow 40-50L/min, H
2flow 5-8L/min, spray distance is 80-120mm, powder sending quantity 10-20g/min; Tack coat coating thickness is 50-100 μ m;
In step 4, the working parameter of ceramic coated layer is: arc voltage 65-75V, flame current 600-630A, Ar flow 35-45L/min, H
2flow 10-15L/min, spray distance is 100-150mm, powder sending quantity 25-35g/min; Ceramic layer thickness is 250-350 μ m.
9. a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating according to claim 1 and 2, is characterized in that:
In step 3, step 4, adopt pressurized air blast-cold mode but to carry out cooling process to base material.
10. a kind of method that adopts plasma spraying technology to prepare to insulate anti-interlock coating according to claim 9, is characterized in that:
In step 3, step 4, adopt pressurized air blast-cold mode but to carry out cooling process to base material, the flow of cooling gas is 100-1000L/min.
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|---|---|---|---|
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|---|---|---|---|
| CN201210530161.2A CN103866224A (en) | 2012-12-11 | 2012-12-11 | Method for preparing insulation anti-adhesion coating by using plasma spray-coating technology |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107254656A (en) * | 2017-08-17 | 2017-10-17 | 桂林电子科技大学 | Neodymium-iron-boron permanent magnetic material surface plasma sprayed ceramic layer and preparation method thereof |
| CN108447645A (en) * | 2017-10-25 | 2018-08-24 | 德清创智热喷涂科技有限公司 | The preparation method of the positive pole pipe of superconducting magnet current feed and positive pipe insulation coating |
| CN108754401A (en) * | 2018-09-07 | 2018-11-06 | 德清创智科技股份有限公司 | Prevent the thermal spraying insulating coating and preparation method thereof that shaft current generates |
| CN110468368A (en) * | 2019-09-20 | 2019-11-19 | 北京航百川科技开发中心 | A kind of heat resistant and wear resistant insulating coating production method |
| CN110885959A (en) * | 2019-12-11 | 2020-03-17 | 广东省新材料研究所 | Composite coating for thermonuclear fusion reactor magnet support part and preparation method thereof |
| CN112126885A (en) * | 2020-08-18 | 2020-12-25 | 江苏南钢通恒特材科技有限公司 | Preparation method of high-temperature-resistant insulating coating of electromagnetic induction heating coil |
| CN112725720A (en) * | 2020-12-23 | 2021-04-30 | 中国兵器工业第五九研究所 | High-temperature-resistant composite ceramic insulating coating and preparation method thereof |
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Cited By (8)
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|---|---|---|---|---|
| CN107254656A (en) * | 2017-08-17 | 2017-10-17 | 桂林电子科技大学 | Neodymium-iron-boron permanent magnetic material surface plasma sprayed ceramic layer and preparation method thereof |
| CN108447645A (en) * | 2017-10-25 | 2018-08-24 | 德清创智热喷涂科技有限公司 | The preparation method of the positive pole pipe of superconducting magnet current feed and positive pipe insulation coating |
| CN108754401A (en) * | 2018-09-07 | 2018-11-06 | 德清创智科技股份有限公司 | Prevent the thermal spraying insulating coating and preparation method thereof that shaft current generates |
| CN110468368A (en) * | 2019-09-20 | 2019-11-19 | 北京航百川科技开发中心 | A kind of heat resistant and wear resistant insulating coating production method |
| CN110885959A (en) * | 2019-12-11 | 2020-03-17 | 广东省新材料研究所 | Composite coating for thermonuclear fusion reactor magnet support part and preparation method thereof |
| CN112126885A (en) * | 2020-08-18 | 2020-12-25 | 江苏南钢通恒特材科技有限公司 | Preparation method of high-temperature-resistant insulating coating of electromagnetic induction heating coil |
| CN112725720A (en) * | 2020-12-23 | 2021-04-30 | 中国兵器工业第五九研究所 | High-temperature-resistant composite ceramic insulating coating and preparation method thereof |
| CN112725720B (en) * | 2020-12-23 | 2022-08-09 | 中国兵器工业第五九研究所 | High-temperature-resistant composite ceramic insulating coating and preparation method thereof |
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Application publication date: 20140618 |