CN116239909A - High Wen Yinshen coating capable of regulating and controlling wave absorbing performance and preparation method thereof - Google Patents

High Wen Yinshen coating capable of regulating and controlling wave absorbing performance and preparation method thereof Download PDF

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CN116239909A
CN116239909A CN202310056879.0A CN202310056879A CN116239909A CN 116239909 A CN116239909 A CN 116239909A CN 202310056879 A CN202310056879 A CN 202310056879A CN 116239909 A CN116239909 A CN 116239909A
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coating
yinshen
temperature
wen
wave absorbing
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管振杰
姜建堂
邵文柱
甄良
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/32—Radiation-absorbing paints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
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    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B05D3/102—Pretreatment of metallic substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/30—Camouflage paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/30—Metallic substrate based on refractory metals (Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W)
    • B05D2202/35—Metallic substrate based on refractory metals (Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W) based on Ti

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Abstract

A high Wen Yinshen coating capable of regulating and controlling wave absorbing performance and a preparation method thereof belong to the technical field of high-temperature wave absorbing material preparation and solve the problem of low wave absorbing performance of the existing high-temperature coating. The method of the invention comprises the following steps: step 1, preprocessing a metal substrate by adopting a micro-arc oxidation method to form a phosphate coating on the surface of the metal substrate in advance; step 2, mixing and stirring the high-temperature ceramic aggregate, the phosphate adhesive, the curing agent and the Co-based high-temperature absorbent according to a preset mass fraction to prepare a coating; and step 3, coating the coating on the surface of the pretreated metal substrate, standing at room temperature for hardening, transferring into a high-temperature furnace for heat preservation, and obtaining the high Wen Yinshen coating on the surface of the metal substrate after the coating is completely solidified. The invention is suitable for preparing the high Wen Yinshen coating.

Description

High Wen Yinshen coating capable of regulating and controlling wave absorbing performance and preparation method thereof
Technical Field
The application relates to the technical field of high-temperature wave-absorbing material preparation, in particular to a preparation method of a high Wen Yinshen coating.
Background
The rapid development of radar technology presents a serious challenge to the survivability of the weapon equipment system, and the wave-absorbing coating is used as an electromagnetic wave control basis to effectively reduce the radar reflection sectional area of the equipment system; the working temperature of the special part of the supersonic weapon equipment reaches 700 ℃, the normal-temperature radar wave-absorbing material is difficult to meet the requirements, and development of the high-performance high-temperature radar wave-absorbing material is urgent.
At present, the high-temperature wave-absorbing coating is generally SiC or Ti 3 SiC 2 、Ti 3 AlC 2 And carbon materials and the like as high-temperature absorbers, which have excellent temperature resistance and chemical stability, but whose non-magnetic properties lead to the loss of ferromagnetic loss, which can attenuate electromagnetic waves only by dielectric loss, and whose electromagnetic absorption bandwidth is narrow. In addition, the stealth coating prepared by the physical coating method generally uses resin as a high-temperature matrix material, the highest service temperature of the prepared coating is not more than 300 ℃, and cracking phenomenon is easy to occur between the coating and the matrix in a high-temperature environment, so that the improvement of the wave absorbing performance of the high-temperature coating is limited.
Disclosure of Invention
The invention aims to solve the problem of low wave-absorbing performance of the existing high-temperature coating, and provides a preparation method of a high Wen Yinshen coating capable of regulating and controlling the wave-absorbing performance.
The invention is realized by the following technical scheme, and in one aspect, the invention provides a preparation method of a high Wen Yinshen coating capable of regulating and controlling wave absorbing performance, which comprises the following steps:
step 1, preprocessing a metal substrate by adopting a micro-arc oxidation method to form a phosphate coating on the surface of the metal substrate in advance;
step 2, mixing and stirring the high-temperature ceramic aggregate, the phosphate adhesive, the curing agent and the Co-based high-temperature absorbent according to a preset mass fraction to prepare a coating;
and step 3, coating the paint on the surface of the pretreated metal substrate, standing at room temperature for hardening, transferring into a high-temperature furnace for heat preservation, and obtaining a high Wen Yinshen coating on the surface of the metal substrate after the paint is completely solidified.
Further, before step 1, the method further comprises: and polishing the metal substrate to remove the surface oxide layer.
Further, the metal substrate is specifically one of a Ti-based substrate, an Fe-based substrate, and an Al-based substrate.
Further, the micro-arc oxidation method specifically includes: the concentration of the aluminum phosphate electrolyte is 0.3-0.7 mol/L, and the current density is 3-7A/dm 2 The reaction time is 10-60 min.
Further, the method for setting the preset mass fraction specifically includes: the mass fraction of the high-temperature ceramic aggregate is 0-40%; the mass fraction of the phosphate adhesive is 30-50%; the mass fraction of the curing agent is 5-10%; the mass fraction of the Co-based high-temperature absorbent is 20-60%.
Further, the high-temperature ceramic aggregate is Al 2 O 3 、TiO 2 、SiO 2 、SiC、Si 3 N 4 One or more of AlN, cordierite and mullite, wherein the size of particles is 1 nm-80 mu m; the phosphate adhesive is any one of an aluminum phosphate adhesive, a zirconium phosphate adhesive, a silicon phosphate adhesive, a boron phosphate adhesive and a magnesium phosphate adhesive; the curing agent is Al 2 O 3 、ZnO、CuO、Fe 2 O 3 And Cr (V) 2 O 3 One of them, the size of the particles is 1 nm-80 μm; the Co-based high-temperature absorbent is one or the mixture of more than one of spherical particles, flaky particles and rod-shaped particles, and the particle rulerThe size range is 200 nm-30 μm.
Further, the transfer to a high temperature furnace for heat preservation is specifically as follows: transferring the mixture into a high-temperature furnace at 300-600 ℃ for 1-8 h.
On the other hand, the invention also provides a high-temperature Wen Yinshen coating based on the preparation method of the high-Wen Yinshen coating with adjustable wave absorbing performance, wherein the high-temperature stealth coating consists of a three-part structure and specifically comprises the following steps: the bottom layer is a metal substrate; the transition layer is a phosphate coating; the surface layer is a composite coating comprising a phosphate adhesive, ceramic aggregate, a curing agent and a Co-based absorbent.
Further, the transition layer is obtained by a micro-arc oxidation method, and the thickness of the transition layer is 0.5-80 mu m.
Further, the surface layer is obtained by a physical coating method, and the thickness of the surface layer is 1-10 mm.
The invention has the beneficial effects that:
firstly, phosphate is used as a high-temperature coating matrix material, and the mechanical property and the thermal shock resistance of the phosphate are verified in the field of high-temperature coatings.
Secondly, the Co-based high temperature absorbent is introduced into the phosphate coating, so that the high temperature coating has the characteristic of high Wen Yinshen.
And thirdly, based on the regulation and control of the types and mass fractions of each phase of the coating and the regulation and control of the size and the morphological characteristics of the Co-based high-temperature absorbent, the regulation and control of the high-temperature stealth performance of the coating can be realized.
The high Wen Yinshen coating preparation technology has simple process, and the prepared coating is tightly combined with the matrix and is not easy to fall off. The phosphate/Co composite coating has two electromagnetic loss mechanisms of ferromagnetism and dielectric, the high Wen Yinshen performance is greatly improved, and the effective absorption can be regulated and controlled in a wider range.
The invention is suitable for preparing the high Wen Yinshen coating.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a typical morphology of a phosphate/Co high temperature stealth coating of the present invention;
FIG. 2 is a schematic illustration of the electromagnetic properties of the phosphate/Co composite coating of the present invention;
FIG. 3 is a graph of the wave absorbing properties of a 2mm thick phosphate/Co composite coating of the present invention in the X-band.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended to illustrate the present invention and should not be construed as limiting the invention.
In a first embodiment, a method for preparing a high Wen Yinshen coating capable of controlling wave absorbing performance, the method comprising:
step 1, preprocessing a metal substrate by adopting a micro-arc oxidation method to form a phosphate coating on the surface of the metal substrate in advance;
step 2, mixing and stirring the high-temperature ceramic aggregate, the phosphate adhesive, the curing agent and the Co-based high-temperature absorbent according to a preset mass fraction to prepare a coating;
and step 3, coating the paint on the surface of the pretreated metal substrate, standing at room temperature for hardening, transferring into a high-temperature furnace for heat preservation, and obtaining a high Wen Yinshen coating on the surface of the metal substrate after the paint is completely solidified.
In this embodiment, first, in this embodiment, phosphate is used as a high-temperature coating base material, and its mechanical properties and thermal shock resistance have been verified in the field of high-temperature coating.
Secondly, the Co-based high temperature absorbent is introduced into the phosphate coating, so that the high temperature coating has the characteristic of high Wen Yinshen.
And thirdly, based on the regulation and control of the types and mass fractions of each phase of the coating and the regulation and control of the size and the morphological characteristics of the Co-based high-temperature absorbent, the regulation and control of the high-temperature stealth performance of the coating can be realized.
In a second embodiment, the method for preparing a high Wen Yinshen coating layer capable of adjusting and controlling the wave absorbing performance according to the first embodiment is further limited, and in this embodiment, the operation before the step 1 is further limited, and specifically includes:
before step 1, the method further comprises: and polishing the metal substrate to remove the surface oxide layer.
In the embodiment, the metal substrate is polished to obtain a clean active surface, so that the effective implementation of the micro-arc oxidation surface treatment process is ensured, and a high-quality phosphate surface coating is obtained, thereby improving the binding force between the high-temperature coating and the metal substrate.
In a third embodiment, the method for preparing a high Wen Yinshen coating layer capable of adjusting and controlling the wave absorbing performance according to the first embodiment is further defined, where the metal substrate is further defined, and specifically includes:
the metal substrate is one of a Ti-based substrate, an Fe-based substrate and an Al-based substrate.
In this embodiment, the applicable metal substrate in this embodiment is not limited, and any one of the three substrates in this embodiment may be selected, so that the preparation of the high Wen Yinshen coating may be completed.
In a fourth embodiment, the method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance according to the first embodiment is further limited, and in this embodiment, the micro-arc oxidation method is further limited, and specifically includes:
the micro-arc oxidation method specifically comprises the following steps: the concentration of the aluminum phosphate electrolyte is 0.3-0.7 mol/L, and the current density is 3-7A/dm 2 The reaction time is 10-60 min.
In this embodiment, the surface pretreatment by the micro-arc oxidation method can effectively achieve better bonding of the coating obtained in step 2 and the substrate, and the thickness is very thin, typically only tens of micrometers.
In a fifth embodiment, the method for preparing a high Wen Yinshen coating capable of adjusting and controlling the wave absorbing performance in the first embodiment is further defined, and in the present embodiment, the method for setting the preset mass fraction is further defined, and specifically includes:
the method for setting the preset mass fraction specifically comprises the following steps: the mass fraction of the high-temperature ceramic aggregate is 0-40%; the mass fraction of the phosphate adhesive is 30-50%; the mass fraction of the curing agent is 5-10%; the mass fraction of the Co-based high-temperature absorbent is 20-60%.
In the embodiment, the quality fraction of each phase is regulated and controlled to realize the regulation and control of the microstructure of the high-temperature coating, so that the regulation and control of the mechanical property and the electromagnetic property of the high-temperature coating are realized.
In a sixth embodiment, the method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance according to the fifth embodiment is further defined, where the method further includes:
the high-temperature ceramic aggregate is Al 2 O 3 、TiO 2 、SiO 2 、SiC、Si 3 N 4 One or more of AlN, cordierite and mullite, wherein the size of particles is 1 nm-80 mu m; the phosphate adhesive is any one of an aluminum phosphate adhesive, a zirconium phosphate adhesive, a silicon phosphate adhesive, a boron phosphate adhesive and a magnesium phosphate adhesive; the curing agent is Al 2 O 3 、ZnO、CuO、Fe 2 O 3 、Cr 2 O 3 One of them, the size of the particles is 1 nm-80 μm; the Co-based high-temperature absorbent is one or a mixture of more than one of spherical particles, flaky particles and rod-shaped particles, and the particle size range is 200 nm-30 mu m.
In the embodiment, the dielectric constants of the selected high-temperature ceramic aggregate, the phosphate adhesive and the curing agent are moderate, so that the impedance matching characteristic of the high-temperature coating is excellent, and the materials are low in cost and easy to obtain. The size and the morphology characteristics of the Co-based high-temperature absorbent are regulated and controlled, so that the intrinsic electromagnetic characteristics of the Co-based high-temperature absorbent can be finely regulated and controlled. In addition, the wave absorbing performance of the high-temperature coating can be regulated and controlled by regulating and controlling the types, the sizes and the morphological characteristics of various phases in the high-temperature coating.
In a seventh embodiment, the method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance according to the first embodiment is further limited, and in this embodiment, the transferring into a high temperature furnace for heat preservation is further limited, and specifically includes:
transferring into a high-temperature furnace for heat preservation, wherein the heat preservation comprises the following steps of: transferring the mixture into a high-temperature furnace at 300-600 ℃ for 1-8 h.
In the embodiment, the set heat preservation temperature and time can realize that the high Wen Yinshen coating is obtained on the surface of the metal substrate after the coating is completely cured.
Embodiment eight, this embodiment is an example of a preparation method of a high Wen Yinshen coating layer based on the above-mentioned method capable of adjusting and controlling the wave absorbing performance, specifically including:
the preparation method of the phosphate/Co high-temperature stealth coating comprises the following specific steps:
a. pretreatment of a titanium substrate: polishing 180mm titanium substrate (Ti-6 Al-4V, TC4) surface with sand paper to remove surface impurities and oxide layer, pretreating the substrate surface with micro-arc oxidation method to form compact aluminum phosphate film on the surface, wherein the micro-arc oxidation method uses aluminum phosphate solution as electrolyte with concentration of 50g/L and current density of 4.0A/dm 2 The micro-arc oxidation time is 30min;
b. high-temperature ceramic aggregate cordierite, aluminum dihydrogen phosphate adhesive and curing agent Al 2 O 3 And spherical Co-based absorber according to 20:50:10:20, mechanically stirring to prepare uniform paint;
c. and (3) coating the mixed coating prepared in the step (II) on the surface of the pretreated metal substrate, standing at room temperature for hardening for 2 hours, transferring to a high-temperature furnace at 500 ℃ for heat preservation for 6 hours, and obtaining the high Wen Yinshen coating on the surface of the metal substrate after the coating is completely solidified.
In a ninth embodiment, the present embodiment is a high Wen Yinshen coating based on a method for preparing a high Wen Yinshen coating capable of adjusting and controlling wave absorbing performance as described above, and the structure of the high temperature stealth coating specifically includes:
the high-temperature stealth coating consists of three parts of structures: the bottom layer is a metal substrate; the transition layer is a phosphate coating, and is obtained by a micro-arc oxidation method, and the thickness of the transition layer is 0.5-80 mu m; the surface layer is a phosphate/Co-based composite coating, and the surface layer is a composite coating comprising a phosphate adhesive, ceramic aggregate, a curing agent and a Co-based absorbent, and is obtained by a physical coating method, wherein the thickness of the composite coating is 1-10 mm.
The high Wen Yinshen coating of the embodiment uses phosphate as a high-temperature coating matrix material, and the mechanical property and the thermal shock resistance of the coating are verified in the field of high-temperature coatings.
Secondly, the Co-based high temperature absorbent is introduced into the phosphate coating, so that the high temperature coating has the characteristic of high Wen Yinshen.
And thirdly, based on the regulation and control of the types and mass fractions of each phase of the coating and the regulation and control of the size and the morphological characteristics of the Co-based high-temperature absorbent, the regulation and control of the high-temperature stealth performance of the coating can be realized.
The following is an explanation of the effects of the present invention:
as shown in FIG. 1, FIG. 1 is a typical morphology of a phosphate/Co high temperature stealth coating, with Co-based high temperature absorbers randomly dispersed within a phosphate matrix, with a size of 5-30 microns. The composite coating has complete structure, no obvious crack, tight combination between the coating and the matrix and high coating strength.
As shown in FIG. 2, FIG. 2 shows the electromagnetic performance of the phosphate/Co composite coating, the test frequency band is the X-band (8.2-12.4 GHz), and the test temperature range is 20-400 ℃. At room temperature, the real part of the dielectric constant of the composite coating fluctuates around 8.5, and the imaginary part fluctuates around 1.0; the real part of the magnetic permeability fluctuates around 1.05, and the imaginary part of the magnetic permeability fluctuates around 0.14. The dielectric constant of the composite coating is obviously increased along with the increase of the temperature, and the dielectric constant of the composite coating is in an ascending trend along with the increase of the frequency; the real part of the permeability of the composite coating increases with increasing temperature, but the imaginary part decreases with increasing temperature. Wherein, (a) is the real part of the dielectric constant, (b) is the imaginary part of the dielectric constant, (c) is the real part of the magnetic permeability, (d) is the imaginary part of the magnetic permeability, and the abscissa is the frequency of the electromagnetic wave.
As shown in FIG. 3, FIG. 3 shows the wave absorbing performance of a 2mm thick phosphate/Co composite coating in the X-band, the maximum absorption peak RL of the coating when the service temperature of the coating is 400 DEG C max The effective absorption bandwidth reaching 9.1dB and higher than 5dB basically covers the whole X-wave band, and the excellent high-temperature electromagnetic stealth characteristic is shown. The abscissa is the electromagnetic frequency.

Claims (10)

1. The preparation method of the high Wen Yinshen coating capable of regulating and controlling the wave absorbing performance is characterized by comprising the following steps of:
step 1, preprocessing a metal substrate by adopting a micro-arc oxidation method to form a phosphate coating on the surface of the metal substrate in advance;
step 2, mixing and stirring the high-temperature ceramic aggregate, the phosphate adhesive, the curing agent and the Co-based high-temperature absorbent according to a preset mass fraction to prepare a coating;
and step 3, coating the paint on the surface of the pretreated metal substrate, standing at room temperature for hardening, transferring into a high-temperature furnace for heat preservation, and obtaining a high Wen Yinshen coating on the surface of the metal substrate after the paint is completely solidified.
2. The method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance according to claim 1, further comprising, before step 1: and polishing the metal substrate to remove the surface oxide layer.
3. The method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance according to claim 1, wherein the metal substrate is one of a Ti-based substrate, a Fe-based substrate and an Al-based substrate.
4. The method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance according to claim 1, wherein the micro-arc oxidation method specifically comprises: the concentration of the aluminum phosphate electrolyte is 0.3-0.7 mol/L, and the current density is 3-7A/dm 2 Reaction ofThe time is 10-60 min.
5. The method for preparing the high Wen Yinshen coating with adjustable wave absorbing performance according to claim 1, wherein the method for setting the preset mass fraction comprises the following steps: the mass fraction of the high-temperature ceramic aggregate is 0-40%; the mass fraction of the phosphate adhesive is 30-50%; the mass fraction of the curing agent is 5-10%; the mass fraction of the Co-based high-temperature absorbent is 20-60%.
6. The method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance according to claim 5, wherein the high-temperature ceramic aggregate is Al 2 O 3 、TiO 2 、SiO 2 、SiC、Si 3 N 4 One or more of AlN, cordierite and mullite, wherein the size of particles is 1 nm-80 mu m; the phosphate adhesive is any one of an aluminum phosphate adhesive, a zirconium phosphate adhesive, a silicon phosphate adhesive, a boron phosphate adhesive and a magnesium phosphate adhesive; the curing agent is Al 2 O 3 、ZnO、CuO、Fe 2 O 3 And Cr (V) 2 O 3 One of them, the size of the particles is 1 nm-80 μm; the Co-based high-temperature absorbent is one or a mixture of more than one of spherical particles, flaky particles and rod-shaped particles, and the particle size range is 200 nm-30 mu m.
7. The method for preparing the high Wen Yinshen coating with adjustable wave absorbing performance according to claim 1, wherein the transferring to a high temperature furnace for heat preservation is specifically as follows: transferring the mixture into a high-temperature furnace at 300-600 ℃ for 1-8 h.
8. A high Wen Yinshen coating based on the method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance as described in claims 1-7, wherein the high temperature stealth coating comprises three parts: the bottom layer is a metal substrate; the transition layer is a phosphate coating; the surface layer is a composite coating comprising a phosphate adhesive, ceramic aggregate, a curing agent and a Co-based absorbent.
9. The method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance according to claim 1, wherein the transitional layer is obtained by a micro-arc oxidation method and has a thickness of 0.5-80 μm.
10. The method for preparing a high Wen Yinshen coating with adjustable wave absorbing performance according to claim 1, wherein the surface layer is obtained by a physical coating method and has a thickness of 1-10 mm.
CN202310056879.0A 2023-01-17 2023-01-17 High Wen Yinshen coating capable of regulating and controlling wave absorbing performance and preparation method thereof Pending CN116239909A (en)

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Citations (2)

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Publication number Priority date Publication date Assignee Title
CN102173727A (en) * 2010-12-15 2011-09-07 电子科技大学 Composite high-temperature-resistant wave-absorbing coating material and preparation method of wave-absorbing coating
CN107474618A (en) * 2017-08-25 2017-12-15 中国科学院宁波材料技术与工程研究所 A kind of high-temperature electromagnetic wave absorbent, microwave absorbing coating and preparation method thereof

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN102173727A (en) * 2010-12-15 2011-09-07 电子科技大学 Composite high-temperature-resistant wave-absorbing coating material and preparation method of wave-absorbing coating
CN107474618A (en) * 2017-08-25 2017-12-15 中国科学院宁波材料技术与工程研究所 A kind of high-temperature electromagnetic wave absorbent, microwave absorbing coating and preparation method thereof

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