CN117626247A - Method and device for realizing rapid surface modification of cold spray coating by utilizing microwave irradiation - Google Patents
Method and device for realizing rapid surface modification of cold spray coating by utilizing microwave irradiation Download PDFInfo
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- 238000005507 spraying Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000004048 modification Effects 0.000 title claims abstract description 27
- 238000012986 modification Methods 0.000 title claims abstract description 27
- 238000000576 coating method Methods 0.000 claims abstract description 62
- 239000011248 coating agent Substances 0.000 claims abstract description 61
- 239000000835 fiber Substances 0.000 claims abstract description 60
- 239000000919 ceramic Substances 0.000 claims abstract description 52
- 239000011358 absorbing material Substances 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 28
- 239000010439 graphite Substances 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 12
- 229910052863 mullite Inorganic materials 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 229920001940 conductive polymer Polymers 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 239000002086 nanomaterial Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 7
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- 230000005855 radiation Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 25
- 238000011282 treatment Methods 0.000 description 11
- 229910017767 Cu—Al Inorganic materials 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 9
- 238000010288 cold spraying Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
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- 229910052802 copper Inorganic materials 0.000 description 2
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a method and a device for realizing rapid surface modification of a cold spray coating by utilizing microwave irradiation, wherein the method comprises the steps of covering a graphite sheet on the surface of the coating, and covering a wave-absorbing material on the outer surface of the graphite sheet; placing the coating, the graphite sheet and the wave-absorbing material in a ceramic fiber box; the ceramic fiber box is provided with a through hole for measuring the internal temperature; placing the ceramic fiber box in a microwave oven device, wherein a temperature measuring device is arranged in the microwave oven device; the temperature measuring device is opposite to the through hole to realize the measurement of the temperature of the inner cavity of the ceramic fiber box; setting the output power, microwave frequency and heating temperature of the microwave oven device; opening a switch of the microwave oven device to heat the ceramic fiber box placed therein; in the heating process, if the temperature collected by the temperature measuring device reaches the preset heating temperature, the heating is stopped, and then the sample is cooled along with the furnace, so that the modification of the surface of the coating can be realized. The method adopts a microwave radiation method to realize surface modification, simplifies the process, reduces the cost and has smaller loss of the mechanical property of the coating.
Description
Technical Field
The invention relates to the technical field of surface modification, in particular to a method and a device for realizing rapid surface modification of a cold spray coating by utilizing microwave irradiation.
Background
In the preparation of cold spray coatings, severe plastic deformation of the particles occurs due to high-speed collisions, resulting in severe work hardening. And because the bonding between the particles and the coating/matrix in the cold spray coating is mainly realized by mechanical bonding, the bonding force between the particles/particles and the particles/matrix is lower. Therefore, it is necessary to post-treat the cold spray coating after the deposition, repair the interfaces between particles in the coating, and improve the bonding state between the coating and the substrate, thereby optimizing the internal structure of the coating, improving the bonding strength of the coating, and meeting diversified use requirements. The commonly used reinforcement modification methods can be classified into wet and dry methods and can be applied to a wide variety of materials including polymers, metals, ceramics and various forms of carbon materials. Wet treatments mainly include chemical or electrochemical treatments and coupling agents or metal coatings, while dry treatments mainly include plasma, light radiation, ozone, and fluorination treatments, etc. The final goal of the various treatments is to alter the mechanical properties of the reinforcement. However, the above method requires high equipment and the process itself is complicated, and there is a possibility that the mechanical properties of the cold spray coating may be lowered. Common post-treatment methods for cold spray coating include annealing treatment, laser treatment and the like, but the processing cost and maintenance cost of the laser treatment are higher, and the treatment time is longer although the traditional muffle furnace annealing treatment is lower.
For the current situation that the laggard productivity, surplus productivity and stock productivity are phased out, dissolved and optimized, the newly increased productivity of the high-energy-consumption industry is strictly controlled, and the transformation and upgrading of the traditional high-energy-consumption industry such as steel, petrochemical industry, chemical industry and the like are promoted, the microwave irradiation is taken as a thermosetting material heating emerging technology which is hopeful to replace the traditional thermosetting, and has great potential of greatly reducing the production energy consumption and improving the production efficiency.
In view of the defects of the prior art, the invention aims to provide a method for realizing surface modification of a cold spray coating by utilizing microwave irradiation, and aims to solve the problems of complex performance regulation and control process, long time consumption, high energy consumption and larger loss of mechanical properties of the coating of the existing cold spray coating.
Disclosure of Invention
1. The technical problems to be solved are as follows:
aiming at the technical problems, the invention provides a method and a device for realizing rapid surface modification of a cold spray coating by utilizing microwave irradiation, and the surface modification is realized by adopting a microwave irradiation method, so that the problems of complicated process, high cost, long time consumption and larger loss of mechanical properties of the coating in the conventional method are solved.
2. The technical scheme is as follows:
a method for realizing rapid surface modification of a cold spray coating by utilizing microwave irradiation, which comprises the following steps:
step one: covering a layer of graphite sheet on the surface of the spraying coating to be modified, and covering the wave-absorbing material with preset thickness on the outer surface of the graphite sheet;
step two: placing the spray coating, the graphite sheet and the wave-absorbing material assembled in the first step into a ceramic fiber box, wherein the shape of the spray coating is completely matched with that of the ceramic fiber box; the ceramic fiber box is internally provided with a through hole for measuring the temperature of the surface of the internal wave-absorbing material;
step three: placing the spray coating, the graphite sheet and the wave-absorbing material assembled in the first step into a ceramic fiber box, wherein the shape of the spray coating is completely matched with that of the ceramic fiber box; the ceramic fiber box is internally provided with a through hole for measuring the internal temperature of the ceramic fiber box;
step four: setting the output power, microwave frequency and heating temperature of the microwave oven device; opening a switch of the microwave oven device to heat the ceramic fiber box placed therein; in the heating process, if the temperature collected by the temperature measuring device reaches the preset heating temperature, the heating is stopped, and then the sample is cooled along with the furnace, so that the modification of the surface of the coating can be realized.
Further, the ceramic fiber box is made of one or more of aluminum silicate plates, zirconium-containing fiber plates, polycrystalline mullite and high-aluminum fiber mixed plates, polycrystalline mullite fiber plates and polycrystalline alumina fiber plates.
Further, the temperature measuring device is a thermocouple temperature measuring device or a thermal resistance temperature measuring device or an infrared temperature sensor.
Further, the wave-absorbing material is one of a carbon wave-absorbing material, an iron wave-absorbing material, a ceramic wave-absorbing material or other types of materials; the carbon-based wave absorbing material includes: graphene, graphite, carbon black, carbon fibers, carbon nanotubes; the iron-based wave absorbing material includes: ferrite, magnetic iron nanomaterial; the ceramic-based wave absorbing material includes: silicon carbide; the other types of materials include: conductive polymers, chiral materials, plasma materials.
Further, the spraying coating to be modified is Cu, al coating and composite coating thereof.
Further, in the fourth step, the output power is 700-1000W; the working frequency is 2.45GHz; the heating temperature is 400-900 ℃.
A device for realizing rapid surface modification of a cold spray coating by utilizing microwave irradiation, comprising: the device comprises a microwave oven device, a ceramic fiber box, a graphite plate, a wave absorbing material, a temperature measuring device and a substrate; wherein the coating of the spraying coating to be modified is outwards and fixedly arranged on the substrate, the surface of the coating is wrapped with a graphite plate, and the surface of the graphite plate is wrapped with a wave-absorbing material; placing the wrapped coating in a ceramic fiber box, and then placing the ceramic fiber box in a microwave oven device for heating; the microwave oven device is switched on and off by the temperature information acquired by the temperature measuring device.
3. The beneficial effects are that:
the invention utilizes microwave irradiation to treat the cold spray coating covered by the wave-absorbing material, the wave-absorbing material rapidly absorbs microwaves in the microwave irradiation process, high temperature is instantaneously generated, after the temperature in the ceramic fiber box reaches the designated temperature, the wave-absorbing material is transferred to the cold spray coating in a top-to-bottom heat transfer mode, and the microwave irradiation has the characteristics of volume heating, selective heating and the like, so that the irradiated coating obtains finer microstructure and better mechanical property. The method has the advantages of simple operation, high heating speed, high energy utilization rate and uniform temperature, and the bonding mode between the particles in the cold spraying coating and the coating/matrix is changed from mechanical bonding to metallurgical bonding, so that the bonding strength between the particles/particles and the particles/matrix is obviously improved.
Drawings
FIG. 1 shows a specific example of cold spray Cu-Al treated by microwave irradiation by the method 2 O 3 In the schematic diagram of the coating device;
FIG. 2 is a schematic and cross-sectional view of a thermal insulation ceramic fiber box device used in an embodiment;
FIG. 3 shows a cold spray Cu-Al treatment by microwave irradiation in an embodiment 2 O 3 Scanning electron microscope pictures before and after coating.
Reference numerals: an infrared thermometer 1; mullite fiber board 2; a wave-absorbing material 3; a cold spray coating 4; a microwave oven 5; microwave 6; a graphite plate 7; a substrate 8.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
A method for realizing rapid surface modification of a cold spray coating by utilizing microwave irradiation, which comprises the following steps:
step one: covering a layer of graphite sheet on the surface of the spraying coating to be modified, and covering the wave-absorbing material with preset thickness on the outer surface of the graphite sheet;
step two: placing the spray coating, the graphite sheet and the wave-absorbing material assembled in the first step into a ceramic fiber box, wherein the shape of the spray coating is completely matched with that of the ceramic fiber box; the ceramic fiber box is internally provided with a through hole for measuring the internal temperature of the ceramic fiber box;
step three: placing the ceramic fiber box in a microwave oven device, wherein a temperature measuring device is arranged in the microwave oven device; the temperature measuring device is opposite to the through hole to measure the temperature of the inner cavity of the ceramic fiber box;
step four: setting the output power, microwave frequency and heating temperature of the microwave oven device; opening a switch of the microwave oven device to heat the ceramic fiber box placed therein; in the heating process, if the temperature collected by the temperature measuring device reaches the preset heating temperature, the heating is stopped, and then the sample is cooled along with the furnace, so that the modification of the surface of the coating can be realized.
Further, the ceramic fiber box is made of one or more of aluminum silicate plates, zirconium-containing fiber plates, polycrystalline mullite and high-aluminum fiber mixed plates, polycrystalline mullite fiber plates and polycrystalline alumina fiber plates.
Further, the temperature measuring device is a thermocouple temperature measuring device or a thermal resistance temperature measuring device or an infrared temperature sensor.
Further, the wave-absorbing material is one of a carbon wave-absorbing material, an iron wave-absorbing material, a ceramic wave-absorbing material or other types of materials; the carbon-based wave absorbing material includes: graphene, graphite, carbon black, carbon fibers, carbon nanotubes; the iron-based wave absorbing material includes: ferrite, magnetic iron nanomaterial; the ceramic-based wave absorbing material includes: silicon carbide; the other types of materials include: conductive polymers, chiral materials, plasma materials.
Further, the spraying coating to be modified is Cu, al coating and composite coating thereof.
Further, in the fourth step, the output power is 700-1000W; the working frequency is 2.45GHz; the heating temperature is 400-900 ℃.
As shown in fig. 1, a device for realizing rapid surface modification of a cold spray coating by microwave irradiation comprises: a microwave oven device 5, a ceramic fiber box 2, a graphite plate 7, a wave absorbing material 3, a temperature measuring device 1 and a substrate 8; wherein the coating of the spraying coating 4 to be modified is outwards and fixedly arranged on the substrate, the surface of the coating is wrapped with a graphite plate, and the surface of the graphite plate is wrapped with a wave-absorbing material; placing the wrapped coating in a ceramic fiber box, and then placing the ceramic fiber box in a microwave oven device for heating; the microwave oven device is switched on and off by the temperature information acquired by the temperature measuring device. In the figure 6 shows microwaves.
Examples:
as shown in figures 1 and 2, the embodiment realizes cold spraying Cu-Al by using microwave irradiation 2 O 3 The coating is quickly surface-modified; the specific operation comprises the following steps:
s1: manufacturing a heat preservation device: in the embodiment, the polycrystalline mullite fiber board is cut into the specified shape and size to be assembled into a box shape, and a round hole is reserved above the polycrystalline mullite fiber board, so that the temperature measuring device can conveniently measure the temperature of materials in the polycrystalline mullite fiber box.
S2: improvement of microwave oven: drilling a small hole right above the household microwave oven, and arranging a base for fixing a temperature measuring device in the hole; the temperature measuring device adopted in the embodiment is a high-precision infrared non-contact type temperature measuring instrument, and the infrared temperature measuring instrument is installed and fixed right above the microwave oven so as to ensure that the temperature measuring instrument can accurately measure the temperature of materials in the polycrystalline mullite fiber box.
S3: in this example, the prepared cold sprayed Cu-Al 2 O 3 The coating is placed in a polycrystalline mullite fiber box, a piece of graphite sheet with the thickness of 1mm, the shape and the size of which are consistent with those of the coating, is placed above the coating, and then the graphite sheet is paved with a wave absorbing material with a certain thickness.
S4: cold spray Cu-Al 2 O 3 Rapid surface modification of the coating: will be provided with cold sprayed Cu-Al 2 O 3 The ceramic fiber box with the coating is placed in a microwave processor, the microwave processing is carried out on the temperature of the wave absorbing material in the ceramic fiber box to 400 ℃ and 450 ℃ respectively under the conditions of 700W output power and 2.45GHz working frequency, and then the ceramic fiber box is cooled in an oven to obtain three different cold spray coatings subjected to microwave heat treatment. As shown in FIG. 3, a scanning electron microscope image of the surface of the coating when untreated, at 400℃and 450 ℃.
In the embodiment, the microwave irradiation is used for treating the SiC covered cold spray coating, in the process of receiving microwave irradiation, vortex flow can be generated due to the action of an alternating electromagnetic field, and a large amount of heat can be generated by the vortex flow, so that the wave-absorbing material is rapidly heated, the expected heat treatment temperature is reached, the wave-absorbing material is transferred to the cold spray coating in a top-down heat transfer mode, and the heat treatment of the cold spray coating is realized in a short time.
As shown in FIG. 3, the embodiment realizes cold spraying Cu-Al by microwave irradiation 2 O 3 Method for rapidly modifying surface of coating, and cold spraying Cu-Al can be realized in a short time 2 O 3 The performance of the coating is regulated and controlled, the volume heating of the cold spray coating is realized by utilizing the direct coupling characteristic of microwaves and materials, and the traditional heating mode from outside to inside is broken through, so that the heating is realizedThe uniformity is good, the heating efficiency is improved, the interfaces between particles in the cold spray coating and the coating/matrix which are not subjected to microwave irradiation treatment are obvious, the deposition direction of the particles can be obviously distinguished, micropores and gaps are unevenly distributed at the boundary of the particles, when the microwave irradiation temperature is 400 ℃, the interfaces of the particles in the coating are slightly improved, the conversion to metallurgical bonding is realized among a few particles, when the microwave irradiation temperature is increased to 450 ℃, the deformation condition of the particles is further eased, and the deposition direction of the particles can not be basically distinguished. In addition, the rise in temperature promotes the occurrence of recrystallization phenomena while exacerbating the atomic diffusion between particles and eventually leading to blurring of most inter-particle interfaces, with only a small portion of the particle interfaces still present. Along with the gradual provision of the microwave irradiation temperature, the coating is more compact, and Cu-Al is reduced 2 O 3 The porosity of the coating is changed from mechanical bonding to metallurgical bonding in the bonding mode between particles in the cold spraying coating and the coating/matrix, and the cold spraying Cu-Al is improved 2 O 3 The bonding strength of the coating and the matrix is improved, and the overall performance is also improved.
In the microwave oven device, a temperature measuring device is additionally arranged at the top of the microwave oven device so as to measure the temperature of materials in the ceramic fiber box; the microwave oven is widely applied to daily life of people, and if the microwave oven is put into modern industrial application, the control of the internal temperature of the microwave oven is related to the quality of the produced products, so that the measurement and monitoring of the oven temperature of the microwave oven are important means for controlling the quality of the products. Therefore, the method adopts a temperature measuring device to realize the measurement and the monitoring of the furnace temperature.
Microwave irradiation is an efficient, green, non-contact heating mode. The method adopts a simple method to carry out heat treatment on the cold spray coating, in the process of receiving microwave irradiation, vortex can be generated due to the action of an alternating electromagnetic field, and a large amount of heat can be generated by the vortex, so that the wave-absorbing material is quickly heated, the expected heat treatment temperature is reached, the wave-absorbing material is transferred to the cold spray coating in a heat transfer mode from top to bottom, and the heat treatment of the cold spray coating is realized in a short time. The method has the advantages of simple and quick operation, high energy utilization rate and uniform temperature, and the bonding mode between the particles in the cold spray coating and the coating/matrix is changed from mechanical bonding to metallurgical bonding, so that the bonding strength between the particles/particles and the particles/matrix is obviously improved.
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended that the scope of the invention shall be limited only by the claims appended hereto.
Claims (7)
1. The method for realizing the rapid surface modification of the cold spray coating by utilizing microwave irradiation is characterized by comprising the following steps of: the method comprises the following steps:
step one: covering a layer of graphite sheet on the surface of the spraying coating to be modified, and covering the wave-absorbing material with preset thickness on the outer surface of the graphite sheet;
step two: placing the spray coating, the graphite sheet and the wave-absorbing material assembled in the first step into a ceramic fiber box, wherein the shape of the spray coating is completely matched with that of the ceramic fiber box; the ceramic fiber box is internally provided with a through hole for measuring the internal temperature of the ceramic fiber box;
step three: placing the ceramic fiber box in a microwave oven device, wherein a temperature measuring device is arranged in the microwave oven device; the temperature measuring device is opposite to the through hole to measure the temperature of the inner cavity of the ceramic fiber box;
step four: setting the output power, microwave frequency and heating temperature of the microwave oven device; opening a switch of the microwave oven device to heat the ceramic fiber box placed therein; in the heating process, if the temperature collected by the temperature measuring device reaches the preset heating temperature, the heating is stopped, and then the sample is cooled along with the furnace, so that the modification of the surface of the coating can be realized.
2. The method for achieving rapid surface modification of cold spray coatings by microwave irradiation according to claim 1, wherein: the ceramic fiber box is made of one or more of aluminum silicate plates, zirconium-containing fiber plates, polycrystalline mullite and high-alumina fiber mixed plates, polycrystalline mullite fiber plates and polycrystalline alumina fiber plates.
3. The method for achieving rapid surface modification of cold spray coatings by microwave irradiation according to claim 1, wherein: the temperature measuring device is a thermocouple temperature measuring device or a thermal resistance temperature measuring device or an infrared temperature sensor.
4. The method for achieving rapid surface modification of cold spray coatings by microwave irradiation according to claim 1, wherein: the wave-absorbing material is one of a carbon wave-absorbing material, an iron wave-absorbing material, a ceramic wave-absorbing material or other types of materials; the carbon-based wave absorbing material includes: graphene, graphite, carbon black, carbon fibers, carbon nanotubes; the iron-based wave absorbing material includes: ferrite, magnetic iron nanomaterial; the ceramic-based wave absorbing material includes: silicon carbide; the other types of materials include: conductive polymers, chiral materials, plasma materials.
5. The method for achieving rapid surface modification of cold spray coatings by microwave irradiation according to claim 1, wherein: the spraying coating to be modified is Cu coating and Al coating and composite coating thereof.
6. The method for achieving rapid surface modification of cold spray coatings by microwave irradiation according to claim 1, wherein: in the fourth step, the output power is 700-1000W; the working frequency is 2.45GHz; the heating temperature is 400-900 ℃.
7. A device for realizing rapid surface modification of a cold spray coating by utilizing microwave irradiation, which adopts the method as claimed in any one of claims 1-6 to realize rapid surface modification of the cold spray coating; the method is characterized in that: comprising the following steps: the device comprises a microwave oven device, a ceramic fiber box, a graphite plate, a wave absorbing material, a temperature measuring device and a substrate; wherein the coating of the spraying coating to be modified is outwards and fixedly arranged on the substrate, the surface of the coating is wrapped with a graphite plate, and the surface of the graphite plate is wrapped with a wave-absorbing material; placing the wrapped coating in a ceramic fiber box, and then placing the ceramic fiber box in a microwave oven device for heating; the microwave oven device is switched on and off by the temperature information acquired by the temperature measuring device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311746409.3A CN117626247A (en) | 2023-12-19 | 2023-12-19 | Method and device for realizing rapid surface modification of cold spray coating by utilizing microwave irradiation |
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| CN202311746409.3A CN117626247A (en) | 2023-12-19 | 2023-12-19 | Method and device for realizing rapid surface modification of cold spray coating by utilizing microwave irradiation |
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