CN116219432A - Electromagnetic shielding coating based on high-speed laser cladding and preparation method and application thereof - Google Patents
Electromagnetic shielding coating based on high-speed laser cladding and preparation method and application thereof Download PDFInfo
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- CN116219432A CN116219432A CN202310255244.3A CN202310255244A CN116219432A CN 116219432 A CN116219432 A CN 116219432A CN 202310255244 A CN202310255244 A CN 202310255244A CN 116219432 A CN116219432 A CN 116219432A
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- 238000000576 coating method Methods 0.000 title claims abstract description 83
- 239000011248 coating agent Substances 0.000 title claims abstract description 81
- 238000004372 laser cladding Methods 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 33
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 32
- 238000005516 engineering process Methods 0.000 claims abstract description 21
- 238000005253 cladding Methods 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000007769 metal material Substances 0.000 claims abstract description 10
- 238000011065 in-situ storage Methods 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 238000011282 treatment Methods 0.000 claims description 23
- 238000004140 cleaning Methods 0.000 claims description 22
- 238000000498 ball milling Methods 0.000 claims description 20
- 238000005498 polishing Methods 0.000 claims description 20
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 9
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002905 metal composite material Substances 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
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- 238000001694 spray drying Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/12—Metallic powder containing non-metallic particles
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
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- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses an electromagnetic shielding coating based on high-speed laser cladding and a preparation method and application thereof. The preparation method comprises the following steps: mixing the carbon nano tube and the metal material in situ to obtain a high-speed laser cladding material; cladding the high-speed laser cladding material on the surface of the substrate by adopting a high-speed laser cladding technology to obtain an electromagnetic shielding coating; wherein, the cladding linear speed adopted in the high-speed laser cladding technology is 3-8m/min, and the single-pass transverse movement is 0.2-1 mm. The invention introduces the high-speed laser cladding technology into the field of electromagnetic shielding coating preparation for the first time, synthesizes the electromagnetic shielding coating of the carbon nano tube/metal in situ, and has high bonding strength of the coating film base and excellent electromagnetic shielding performance.
Description
Technical Field
The invention belongs to the technical field of laser cladding, and relates to an electromagnetic shielding coating based on high-speed laser cladding, and a preparation method and application thereof.
Background
The electromagnetic shielding material can effectively solve the problems of electromagnetic interference and electromagnetic compatibility caused by electromagnetic waves, is a necessity of electronic equipment, and has important significance for social economy, resident life, national defense construction and the like. In terms of materials, zinc powder and copper powder are the most widely used metallic electromagnetic shielding materials for electroplating and electroless plating. The shielding material plated by zinc powder and copper powder and chemically plated has the advantages of good conductivity, moderate price, easy installation and the like. Copper powder has the advantages of good conductivity, easy oxidation of copper molecules and rapid decrease of conductivity after oxidation of the surface of the shielding material. At present, the metal composite shielding material is mainly a spraying type metal composite shielding material and a coating type metal composite shielding material which are low in cost and easy to construct. The conductive paint on the surface layer of the spray/coating type shielding material can be sprayed on fabrics, plastics, glass fiber reinforced plastics and wood boards. However, the bonding strength of the film base of the shielding coating is not high, the coating has the peeling phenomenon, and the quality of the product is still to be improved.
Disclosure of Invention
The invention mainly aims to provide an electromagnetic shielding coating based on high-speed laser cladding, and a preparation method and application thereof, so as to overcome the defects of the prior art.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention comprises the following steps:
the embodiment of the invention provides a preparation method of an electromagnetic shielding coating based on high-speed laser cladding, which comprises the following steps:
mixing the carbon nano tube and the metal material in situ to obtain a high-speed laser cladding material;
cladding the high-speed laser cladding material on the surface of the substrate by adopting a high-speed laser cladding technology to obtain an electromagnetic shielding coating; wherein, the laser power adopted in the high-speed laser cladding technology is 0.8-2kW, the cladding linear speed is 3-8m/min, and the single-pass transverse movement is 0.2-1 mm.
The embodiment of the invention also provides the electromagnetic shielding coating based on high-speed laser cladding, which is prepared by the preparation method, and comprises a carbon nano tube/metal composite coating, wherein the content of the carbon nano tube in the electromagnetic shielding coating is 0.5-3wt%, and the carbon nano tube in the electromagnetic shielding coating is dispersed and distributed in metal.
The embodiment of the invention also provides the application of the electromagnetic shielding coating based on high-speed laser cladding in electromagnetic shielding protection.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, a high-speed laser cladding technology is introduced into the field of electromagnetic shielding coating preparation for the first time, the electromagnetic shielding coating of the carbon nano tube/metal with excellent electromagnetic shielding performance is synthesized in situ, the metallurgical bonding of the coating and a matrix is realized, and the bonding strength of the film matrix is improved by more than 10 times compared with that of spraying/coating;
(2) The invention prepares the electromagnetic shielding coating by using the ultra-high speed laser cladding technology for the first time, and the prepared electromagnetic shielding coating has excellent electromagnetic shielding performance and shielding efficiency of 15-30dB.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a graph showing the electromagnetic shielding performance of the electromagnetic shielding coatings produced in examples 1 to 4 of the present invention.
Detailed Description
In view of the shortcomings of the prior art, the inventor of the present application has long studied and put forward a great deal of practice, and the technical solution of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Specifically, as one aspect of the technical scheme of the invention, the preparation method of the electromagnetic shielding coating based on high-speed laser cladding comprises the following steps:
mixing the carbon nano tube and the metal material in situ to obtain a high-speed laser cladding material;
cladding the high-speed laser cladding material on the surface of the substrate by adopting a high-speed laser cladding technology to obtain an electromagnetic shielding coating; wherein, the laser power adopted in the high-speed laser cladding technology is 0.8-2kW, the cladding linear speed is 3-8m/min, and the single-pass transverse movement is 0.2-1 mm.
In the invention, the electromagnetic shielding material components are designed to prepare coatings with different carbon nanotube contents; the physical properties of the material are regulated and controlled through component design, so that the electromagnetic shielding effectiveness of the carbon nano tube-metal coating is improved, and meanwhile, the heat input in the cladding process is controlled through optimizing process parameters, so that the preparation process corresponding to materials with different component characteristics is obtained, and the controllable preparation of the electromagnetic shielding coating with uniform components and compact tissues is realized. Wherein the addition amount of the carbon nano tube is 0.5-3wt%; the invention prepares the electromagnetic shielding coating by using a high-speed laser cladding technology for the first time, and the coating has high base strength; the laser cladding realizes in-situ preparation of the carbon nano tube/metal composite material, and has excellent electromagnetic shielding performance and shielding efficiency as high as 30dB.
In some preferred embodiments, the metal material includes any one or a combination of two or more of iron powder, cobalt powder, nickel powder, and the like, and is not limited thereto.
In some preferred embodiments, the mass ratio of the carbon nanotubes to the metal material is 0.5 to 3:100.
in some preferred embodiments, the diameter of a light spot adopted in the high-speed laser cladding technology is 2-4m, the lap joint rate is 30-80%, and the flow rate of the protective gas is 12-22L/min; wherein the shielding gas comprises argon.
In some preferred embodiments, the method of making further comprises: before the cladding treatment, polishing and cleaning the substrate, at least enabling the roughness of the surface of the substrate obtained by polishing and cleaning to be below 12.5.
Further, the cleaning process includes: and cleaning the surface of the substrate obtained by polishing by adopting acetone and alcohol in sequence.
In some preferred embodiments, the method of making comprises: and (3) placing the carbon nano tube and the metal material in a ball milling device, and ball milling for 0.5-2 hours under the condition that the ball milling speed is 100-400r/min, so as to obtain the high-speed laser cladding material.
In some preferred embodiments, the electromagnetic shielding coating has a thickness of 0.5 to 5mm.
Further, the thickness of the electromagnetic shielding coating is 0.5-3mm.
In some preferred embodiments, the substrate includes any one of titanium alloy, steel, nickel, aluminum, and is not limited thereto.
In some more specific embodiments, the method for preparing the electromagnetic shielding coating based on high-speed laser cladding comprises the following steps:
(1) Carbon nanotubes, iron powder and cobalt powder according to (0-3 wt%) CNT-Fe 0.7 Co 0.3 Mixing the ingredients in proportion on a ball mill, wherein the ball milling speed is 200r/min, and the ball milling time is 0.5h, so as to obtain the high-speed laser cladding material.
(2) Polishing and clear cleaning treatment are carried out on a substrate, then a high-speed laser cladding technology is adopted to clad the high-speed laser cladding material on the surface of the substrate, and an electromagnetic shielding coating is obtained, and the cleaning treatment comprises: the surface of the substrate obtained by polishing treatment is cleaned by adopting acetone and alcohol in sequence, the laser power is 0.8-2kW, the cladding speed is 3-8m/min, the spot diameter is 3mm, the lap joint rate is 50%, the flow rate of protective gas is 12-22L/min, and the coating thickness is 0.5-3mm.
The invention also provides an electromagnetic shielding coating based on high-speed laser cladding, which is prepared by the preparation method, and comprises a carbon nano tube/metal composite coating, wherein the content of the carbon nano tube in the electromagnetic shielding coating is 0.5-3wt%, and the carbon nano tube in the electromagnetic shielding coating is dispersed and distributed in metal.
Further, the bonding strength of the electromagnetic shielding coating and the matrix is 220-260 MP.
Further, the electromagnetic shielding effectiveness of the electromagnetic shielding coating is 15-30dB.
Another aspect of the embodiments of the present invention further provides the use of the electromagnetic shielding coating based on high-speed laser cladding in electromagnetic shielding protection.
With the advent of the high-frequency high-speed 5G age and the development of wearable equipment, the requirements on the electromagnetic shielding protection level for civil, industrial and military use are higher and higher, and the requirements on electromagnetic shielding materials are higher.
The technical scheme of the present invention is further described in detail below with reference to several preferred embodiments and the accompanying drawings, and the embodiments are implemented on the premise of the technical scheme of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.
The experimental materials used in the examples described below, unless otherwise specified, were all commercially available from conventional biochemicals.
Example 1
(1) Carbon nanotubes, iron powder and cobalt powder were mixed according to (0.5 wt%) CNT-Fe 0.7 Co 0.3 Mixing the ingredients in proportion on a ball mill, wherein the ball milling speed is 200r/min, and the ball milling time is 0.5h, so as to obtain a high-speed laser cladding material;
(2) Polishing and clear cleaning treatment are carried out on a substrate, then a high-speed laser cladding technology is adopted to clad the high-speed laser cladding material on the surface of the titanium alloy substrate, and an electromagnetic shielding coating is obtained, and the cleaning treatment comprises: the surface of the substrate obtained by polishing treatment is cleaned by adopting acetone and alcohol in sequence, the laser power is 1.0kW, the cladding speed is 5m/min, the spot diameter is 3mm, the lap joint rate is 50%, the flow of protective gas is 15L/min, and the thickness of the coating is 3mm.
The electromagnetic shielding effectiveness chart of the electromagnetic shielding coating prepared in this example is shown in fig. 1, and the bonding strength between the electromagnetic shielding coating and the substrate is 220MPa.
Example 2
(1) Carbon nanotubes, iron powder and cobalt powder according to (1 wt%) CNT-Fe 0.7 Co 0.3 Mixing the ingredients in proportion on a ball mill, wherein the ball milling speed is 200r/min, and the ball milling time is 0.5h, so as to obtain a high-speed laser cladding material;
(2) Polishing and clear cleaning treatment are carried out on the titanium alloy matrix, then a high-speed laser cladding technology is adopted to clad the high-speed laser cladding material on the surface of the titanium alloy matrix, and an electromagnetic shielding coating is obtained, and the cleaning treatment comprises: the surface of the substrate obtained by polishing treatment is cleaned by adopting acetone and alcohol in sequence, the laser power is 1.0kW, the cladding speed is 5m/min, the spot diameter is 3mm, the lap joint rate is 50%, the flow of protective gas is 15L/min, and the thickness of the coating is 3mm.
The electromagnetic shielding effectiveness chart of the electromagnetic shielding coating prepared in this example is shown in fig. 1, and the bonding strength between the electromagnetic shielding coating and the substrate is 230MPa.
Example 3
(1) Carbon nanotubes, iron powder and cobalt powder were mixed according to (1.5 wt%) CNT-Fe 0.7 Co 0.3 Mixing the ingredients in proportion on a ball mill, wherein the ball milling speed is 200r/min, and the ball milling time is 0.5h, so as to obtain a high-speed laser cladding material;
(2) Polishing and clear cleaning treatment are carried out on the titanium alloy matrix, then a high-speed laser cladding technology is adopted to clad the high-speed laser cladding material on the surface of the titanium alloy matrix, and an electromagnetic shielding coating is obtained, and the cleaning treatment comprises: the surface of the substrate obtained by polishing treatment is cleaned by adopting acetone and alcohol in sequence, the laser power is 1.0kW, the cladding speed is 5m/min, the spot diameter is 3mm, the lap joint rate is 50%, the flow of shielding gas is 15L/min, the thickness of the coating is 3mm, and the bonding strength of the electromagnetic shielding coating and the substrate is 240MPa.
The electromagnetic shielding effectiveness chart of the electromagnetic shielding coating prepared in this example is shown in fig. 1.
Example 4
(1) Carbon nanotubes, iron powder and cobalt powder according to (2 wt%) CNT-Fe0 7 Co0 3 Mixing the ingredients in proportion on a ball mill, wherein the ball milling speed is 200r/min, and the ball milling time is 0.5h, so as to obtain a high-speed laser cladding material;
(2) Polishing and clear cleaning treatment are carried out on the titanium alloy matrix, then a high-speed laser cladding technology is adopted to clad the high-speed laser cladding material on the surface of the titanium alloy matrix, and an electromagnetic shielding coating is obtained, and the cleaning treatment comprises: the surface of the substrate obtained by polishing treatment is cleaned by adopting acetone and alcohol in sequence, the laser power is 1.0kW, the cladding speed is 5m/min, the spot diameter is 3mm, the lap joint rate is 50%, the flow of protective gas is 15L/min, and the thickness of the coating is 3mm.
The electromagnetic shielding effectiveness chart of the electromagnetic shielding coating prepared in this example is shown in fig. 1, and the bonding strength between the electromagnetic shielding coating and the substrate is 255MPa.
Example 5
(1) Carbon nanotubes, iron powder and cobalt powder were mixed according to (1.5 wt%) CNT-Fe 0.7 Co 0.3 Mixing the ingredients in proportion on a ball mill, wherein the ball milling speed is 300r/min, and the ball milling time is 1h, so as to obtain a high-speed laser cladding material;
(2) Polishing and clear cleaning treatment are carried out on a steel substrate, then a high-speed laser cladding technology is adopted to clad the high-speed laser cladding material on the surface of the steel substrate, and an electromagnetic shielding coating is obtained, and the cleaning treatment comprises: the surface of the substrate obtained by polishing treatment is cleaned by adopting acetone and alcohol in sequence, the laser power is 2.0kW, the cladding speed is 8m/min, the spot diameter is 4mm, the lap joint rate is 80%, the flow rate of protective gas is 22L/min, and the coating thickness is 5mm.
Example 6
(1) Carbon nanotubes, iron powder and cobalt powder were mixed according to (1.5 wt%) CNT-Fe 0.7 Co 0.3 Mixing the ingredients in proportion on a ball mill, wherein the ball milling speed is 100r/min, and the ball milling time is 2h, so as to obtain a high-speed laser cladding material;
(2) Polishing and clear cleaning treatment are carried out on an aluminum substrate, then a high-speed laser cladding technology is adopted to clad the high-speed laser cladding material on the surface of the aluminum substrate, and an electromagnetic shielding coating is obtained, and the cleaning treatment comprises: the surface of the substrate obtained by polishing treatment is cleaned by adopting acetone and alcohol in sequence, the laser power is 0.8kW, the cladding speed is 3m/min, the spot diameter is 2mm, the lap joint rate is 30%, the flow of protective gas is 12L/min, and the thickness of the coating is 1mm.
Comparative example 1
The method is the same as in example 3, except that the coating is prepared by spray drying in this example, the bonding strength between the prepared coating and the substrate is 15MPa, the bonding strength of the film substrate is far lower than that of example 1, and the electromagnetic shielding is lower than that of example 3.
Comparative example 2
The process is the same as in example 3, except that no carbon nanotubes are present; since no carbon nanotubes were added, the average electromagnetic shielding effectiveness of the prepared coating was 5dB.
Comparative example 3
The process was the same as in example 3, except that the content of carbon nanotubes was 4%. The carbon nanotubes continue to increase, the coating formation is affected, a coating with compact structure cannot be obtained, and meanwhile, the bonding strength and electromagnetic shielding effectiveness of the coating and a matrix are lower than those of the embodiment 3.
In addition, the inventors have conducted experiments with other materials, process operations, and process conditions as described in this specification with reference to the foregoing examples, and have all obtained desirable results.
It should be understood that the technical solution of the present invention is not limited to the above specific embodiments, and all technical modifications made according to the technical solution of the present invention without departing from the spirit of the present invention and the scope of the claims are within the scope of the present invention.
Claims (10)
1. The preparation method of the electromagnetic shielding coating based on high-speed laser cladding is characterized by comprising the following steps of:
mixing the carbon nano tube and the metal material in situ to obtain a high-speed laser cladding material;
cladding the high-speed laser cladding material on the surface of the substrate by adopting a high-speed laser cladding technology to obtain an electromagnetic shielding coating; wherein, the laser power adopted in the high-speed laser cladding technology is 0.8-2kW, the cladding linear speed is 3-8m/min, and the single-pass transverse movement is 0.2-1 mm.
2. The method of manufacturing according to claim 1, characterized in that: the metal material comprises any one or the combination of more than two of iron powder, cobalt powder and nickel powder.
3. The method of manufacturing according to claim 1, characterized in that: the mass ratio of the carbon nano tube to the metal material is 0.5-3:100.
4. The method of manufacturing according to claim 1, characterized in that: the diameter of a light spot adopted in the high-speed laser cladding technology is 2-4m, the lap joint rate is 30-80%, and the flow rate of the shielding gas is 12-22L/min; wherein the shielding gas comprises argon.
5. The method for producing according to claim 1, characterized by further comprising: before the cladding treatment, polishing and cleaning the substrate, at least enabling the roughness of the surface of the substrate obtained by polishing and cleaning to be below 12.5;
preferably, the cleaning process includes: and cleaning the surface of the substrate obtained by polishing by adopting acetone and alcohol in sequence.
6. The preparation method according to claim 1, characterized by comprising: and (3) placing the carbon nano tube and the metal material in a ball milling device, and ball milling for 0.5-2 hours under the condition that the ball milling speed is 100-400r/min, so as to obtain the high-speed laser cladding material.
7. The method of manufacturing according to claim 1, characterized in that: the thickness of the electromagnetic shielding coating is 0.5-5mm.
8. The method of manufacturing according to claim 1, characterized in that: the matrix comprises any one of titanium alloy, steel, nickel and aluminum.
9. An electromagnetic shielding coating based on high-speed laser cladding, which is prepared by the preparation method of any one of claims 1-8, wherein the electromagnetic shielding coating comprises a carbon nano tube/metal composite coating, the content of the carbon nano tube in the electromagnetic shielding coating is 0.5-3wt%, and the carbon nano tube in the electromagnetic shielding coating is dispersed and distributed in metal;
preferably, the bonding strength between the electromagnetic shielding coating and the matrix is 220-260 MP; preferably, the electromagnetic shielding effectiveness of the electromagnetic shielding coating is 15-30dB.
10. Use of the electromagnetic shielding coating based on high-speed laser cladding as claimed in claim 9 for electromagnetic shielding protection.
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| US20170243668A1 (en) * | 2014-01-24 | 2017-08-24 | William Marsh Rice University | Carbon nanotube-coated substrates and methods of making the same |
| CN110684976A (en) * | 2019-10-14 | 2020-01-14 | 山东大学 | Method for preparing carbon nano tube reinforced composite cladding layer on surface of titanium alloy |
| CN114369822A (en) * | 2022-01-11 | 2022-04-19 | 广东海洋大学 | Method for preparing iron-based amorphous coating by laser cladding |
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| CN103088337A (en) * | 2013-01-31 | 2013-05-08 | 南昌航空大学 | Method for laser-induction hybrid cladding of copper composite coating dispersedly strengthened by carbon nanotubes (CNTs) |
| US20170243668A1 (en) * | 2014-01-24 | 2017-08-24 | William Marsh Rice University | Carbon nanotube-coated substrates and methods of making the same |
| CN104725655A (en) * | 2014-05-27 | 2015-06-24 | 昆明纳太能源科技有限公司 | Surface composite carbon nano material as well as preparation method and application thereof |
| CN104109823A (en) * | 2014-07-04 | 2014-10-22 | 南昌航空大学 | Method for preparing carbon nanotube-reinforced iron-rich porous composite material through laser-induction composite cladding |
| CN110684976A (en) * | 2019-10-14 | 2020-01-14 | 山东大学 | Method for preparing carbon nano tube reinforced composite cladding layer on surface of titanium alloy |
| CN114369822A (en) * | 2022-01-11 | 2022-04-19 | 广东海洋大学 | Method for preparing iron-based amorphous coating by laser cladding |
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