CN110804735A - Heat conduction radiation heat dissipation composite coating suitable for titanium alloy - Google Patents

Heat conduction radiation heat dissipation composite coating suitable for titanium alloy Download PDF

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CN110804735A
CN110804735A CN201911245932.1A CN201911245932A CN110804735A CN 110804735 A CN110804735 A CN 110804735A CN 201911245932 A CN201911245932 A CN 201911245932A CN 110804735 A CN110804735 A CN 110804735A
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titanium alloy
metal structure
structure layer
heat conduction
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CN110804735B (en
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杨理京
李争显
王少鹏
汪欣
李欢
王培�
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Northwest Institute for Non Ferrous Metal Research
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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
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles
    • 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
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
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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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates

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Abstract

The invention discloses a heat conduction radiation heat dissipation composite coating suitable for titanium alloy, which consists of a reticular metal structure layer and a non-metallic oxide coating coated on the reticular metal structure layer, and the preparation process comprises the following steps: firstly, cold spraying soft metal powder on the surface of the titanium alloy to form a net-shaped metal structure layer; secondly, preparing powder of the nano SiC-spinel-oxide composite material into mixed slurry, spraying the mixed slurry on the reticular metal structure layer, and drying and curing the mixed slurry on the surface of the titanium alloy to obtain the heat dissipation composite coating. According to the invention, the reticular metal structure layer with the heat conduction function and the non-metallic oxide coating with the radiation heat dissipation function are compounded, the reticular metal structure layer is adopted to increase the area of the heat conduction layer, so that the contact area between the heat conduction layer and the infrared radiation layer is increased, the heat conduction performance between the heat conduction layer and the infrared radiation layer is improved, the heat conduction efficiency and the infrared radiation efficiency of the titanium alloy are improved, and the problems of small heat conductivity and poor infrared radiation performance of the titanium alloy coating are solved.

Description

Heat conduction radiation heat dissipation composite coating suitable for titanium alloy
Technical Field
The invention belongs to the technical field of metal composite material preparation, and particularly relates to a heat conduction radiation heat dissipation composite coating suitable for a titanium alloy.
Background
The stable working environment is a necessary condition for ensuring the high-efficiency and stable output of the laser, wherein the most important is that the working temperature of the core device cannot be too high. And laser range finder measures the promotion of response rate along with measuring the increase of distance, and the pulse power of laser instrument is bigger and bigger, if laser instrument system heat dissipation efficiency is not high, direct influence laser range finder's range finding performance. For the heat power consumption generated when the laser works, a heat storage water tank or an air cooling heat exchange system is generally adopted for cooling. But along with distance measuring equipment to miniaturized, lightweight requirement is higher and higher, can't use the forced air cooling heat dissipation, and the laser instrument heat dissipation only relies on the hot melt of coolant liquid in the water tank to cool down, in case coolant liquid temperature rises to certain numerical value then can't continue to cool off the laser instrument.
At present, the laser power is getting larger and larger, the generated heat is more and more, and the requirement for heat dissipation is higher and more. Due to the harsh requirements of the use environment and the use condition of laser products, the laser has quite high requirements on the structural stability, and a large amount of titanium alloy materials are generally used. However, titanium alloy is a metal material with very poor thermal conductivity, and the water tank cannot smoothly lead out through the titanium alloy body after absorbing a large amount of heat generated by the laser, which finally causes a series of problems of laser temperature rise, laser beam quality reduction, capability reduction and the like. Therefore, the system must be stopped after working for a certain time, and can be reused after being cooled, which seriously affects the usability of the equipment. Therefore, a novel heat dissipation and cooling technical means is required to improve the heat dissipation capacity of the laser, increase the continuous working time of the system and shorten the cooling recovery time. Therefore, it is required to develop a coating material applied to the outside of the case, which can significantly increase the heat dissipation effect.
The heat dissipation coating mainly comprises a high infrared emissivity coating and a high thermal conductivity coating, and the high infrared emissivity coating can be prepared by various means such as coating brush coating or magnetron sputtering. The high thermal conductivity coating has high thermal conductivity coefficient, can rapidly conduct heat away, and researches on high thermal conductivity products mainly focus on non-oxide coatings such as nitrides and carbides, particularly nitrides have excellent optical performance, wherein aluminum nitride has high resistivity, thermal conductivity and good chemical stability, and is widely applied to products such as aerospace radiators, semiconductor radiating fins and the like. In recent years, the graphene material is emphasized by researchers due to the thermal conductivity of 5000W/m.K, but the heat flux in the transverse heat conduction process is greatly limited because the coating thickness of the graphene material is thin. At present, the design research on the heat dissipation coating of the titanium alloy structural material mainly focuses on the research on the high infrared radiation heat dissipation coating, but the infrared radiation heat dissipation effect is poor due to the limitation of small heat conductivity and poor heat conductivity of the titanium alloy material; the research on the composite coating which is designed by aiming at the titanium alloy material and has the functions of high heat conduction and high infrared radiation is not reported yet.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a heat conduction radiation heat dissipation composite coating suitable for titanium alloy, aiming at the defects of the prior art. This heat dissipation composite coating compounds the network metal structure layer that will have the heat conduction function and the non metallic oxide coating that has the radiation heat dissipation function, adopt network metal structure layer to increase the area of heat-conducting layer, and then increased the area of contact of heat-conducting layer and infrared radiation layer, the heat conductivility between heat-conducting layer and the infrared radiation layer has been promoted, thereby the infrared radiation efficiency of titanium alloy has been improved when improving titanium alloy heat conduction efficiency, it is little to have solved present titanium alloy coating heat conductivity, the not good problem of infrared radiation heat dispersion.
In order to solve the technical problems, the invention adopts the technical scheme that: the heat-conducting radiation heat-dissipating composite coating suitable for the titanium alloy is characterized by comprising a net-shaped metal structure layer with a heat-conducting function and a non-metallic oxide coating which is coated on the net-shaped metal structure layer and has a radiation heat-dissipating function, wherein the heat-dissipating composite coating is prepared by the following steps:
step one, spraying soft metal powder with thermal conductivity superior to that of titanium alloy on the surface of the titanium alloy by adopting a cold spraying method to form a net-shaped metal structure layer;
step two, adding powder of the nano SiC-spinel-oxide composite material into a water glass solvent, then adding phenolic resin to obtain mixed slurry, spraying the mixed slurry on the reticular metal structure layer obtained in the step one by adopting a spraying solidification method, and drying and solidifying to form a non-metallic oxide coating, thereby obtaining a heat dissipation composite coating on the surface of the titanium alloy; the thermal conductivity of the composite coating is not less than 100W/m.K, and the infrared emissivity of a wave band of 5-20 microns is not less than 0.95.
According to the thermodynamic principle, heat conduction and radiation of the coating are key to heat dissipation, so that heat conduction between the heat conduction layer and the radiation layer is also key to influence heat dissipation, and the heat passing through a given area in unit time is proportional to the temperature gradient of the given area and the area S perpendicular to the heat conduction direction, as shown in formula (1):
Figure BDA0002307627740000031
in the formula (1), lambda is thermal conductivity, S is thermal conductive area, Q is heat,
Figure BDA0002307627740000032
for a temperature gradient, "-" indicates that heat is transferred from a high temperature to a low temperature.
And the contact interface between the heat conduction layer and the thermal radiation layer has thermal contact resistance, which is the key for influencing the heat transfer of the heat conduction layer to the radiation layer, if the heat conduction layer and the radiation layer are not well transferred, the heat dissipation function of the radiation layer is directly influenced, according to the thermal resistance theory, the most important influencing factor of the thermal contact resistance is the contact area, the thermal contact resistance is in inverse proportion to the contact area S, and the calculation formula of the thermal contact resistance is as follows (2):
Figure BDA0002307627740000033
r in formula (2)cIs contact thermal resistance, kcIs the thermal conductivity and s is the contact area
The invention is suitable for the heat conduction radiation heat dissipation composite coating of the titanium alloy to be made up of netted metallic structure layer with heat conduction function and non-metallic oxide coating with radiation heat dissipation function, prepare the netted metallic structure layer (namely heat-conducting layer) formed by metal powder of high heat conduction on the surface of titanium alloy by cold spraying at first, then adopt the method of spraying solidification to pack and solidify the mixed slurry containing composite material of high infrared radiation on the netted metallic structure layer and form the non-metallic oxide coating (namely infrared radiation layer), have increased the area of the heat-conducting layer effectively through the netted metallic structure layer, and then has increased the contact area of the heat-conducting layer and infrared radiation layer, reduce the interface contact thermal resistance between infrared radiation layer and the heat-conducting layer, has promoted the heat conduction performance between infrared radiation layer and the heat-conducting layer, thus has raised the infrared radiation efficiency of the titanium alloy while raising the heat conduction efficiency of the, the problems of low heat conductivity and poor infrared radiation heat dissipation performance of the existing titanium alloy coating are solved.
The heat-conducting radiation heat-dissipating composite coating suitable for the titanium alloy is characterized in that in the step one, the soft metal powder comprises copper, copper alloy, aluminum alloy, gold, silver or nickel, and the particle size of the soft metal powder is 20-40 μm. The heat dissipation composite coating is suitable for the components and the granularity of the soft metal powder for preparing the heat conduction layer, and the practical value of the heat dissipation composite coating is improved.
The heat-conducting radiation heat-dissipating composite coating suitable for the titanium alloy is characterized in that in the first step, the mesh shape in the reticular metal structure layer is a parallelogram, the acute angle of the parallelogram is 45-90 degrees, the length of the lower bottom edge is 10-30 mm, the height is 10-30 mm, and the thickness of the reticular metal structure layer is 5-10 mm. The mesh-shaped metal structure layer with the optimized structure and parameters, which is prepared by adopting a cold spraying method, further effectively increases the area of the heat conduction layer, thereby being beneficial to increasing the contact area of the heat conduction layer and the infrared radiation layer and improving the heat conduction performance between the heat conduction layer and the infrared radiation layer.
The heat-conducting radiation heat-dissipating composite coating suitable for the titanium alloy is characterized in that the oxide in the nano SiC-spinel-oxide composite material in the second step is CaCO3、Al2O3、Fe2O3And SiO2The powder of the nano SiC-spinel-oxide composite material is prepared by a high-energy ball milling method, and the particle size of the powder of the nano SiC-spinel-oxide composite material is in a submicron level. The nano SiC-spinel-oxide composite material with the optimized composition has a high radiation coefficient, and the preparation method and the micro-nano granularity are favorable for preparing powder of the nano SiC-spinel-oxide composite material into slurry to be sprayed on a net-shaped metal structure layer (namely a heat conduction layer) to form a uniformly distributed non-metal oxide coating, so that the radiation heat dissipation performance of the nano SiC-spinel-oxide composite material is exerted.
The heat-conducting radiation heat-dissipating composite coating suitable for the titanium alloy is characterized in that in the second step, the mass content of the powder of the nano SiC-spinel-oxide composite material in the mixed slurry is 35-65%, and the mass content of the phenolic resin is 10-20%. The mixed slurry with the optimized composition ensures that the nano SiC-spinel-oxide composite material fully exerts the radiating heat dispersion performance, enhances the bonding strength of the slurry and the reticular metal structure layer, and further synergistically improves the heat conduction performance between the heat conduction layer and the infrared radiation layer.
Compared with the prior art, the invention has the following advantages:
1. the invention compounds the reticular metal structure layer (namely heat conduction layer) with heat conduction function and the non-metallic oxide coating with radiation heat dissipation function to form the heat dissipation compound coating (namely infrared radiation layer) suitable for titanium alloy, firstly prepares the reticular metal structure layer formed by high heat conduction metal powder on the surface of the titanium alloy by adopting a cold spraying method, and then coats slurry of radiation materials, thereby effectively increasing the area of the heat conduction layer, further increasing the contact area of the heat conduction layer and the infrared radiation layer, reducing the interface thermal resistance between the heat conduction layer and the infrared radiation layer, and improving the heat conduction performance between the heat conduction layer and the infrared radiation layer, thereby improving the infrared radiation efficiency of the titanium alloy while improving the heat conduction efficiency of the titanium alloy, and solving the problems of small heat conductivity and poor infrared radiation heat dissipation performance of the current titanium alloy coating.
2. According to the invention, the cold spraying method is adopted to prepare the reticular metal structure layer formed by the high-heat-conductivity metal powder on the surface of the titanium alloy, the oxidation of the titanium alloy and the high-heat-conductivity metal powder is effectively avoided by utilizing the low-temperature solid deposition characteristic of cold spraying, and the performance of the heat dissipation composite coating is effectively ensured.
3. The invention adopts the nanometer SiC-spinel-oxide composite material with submicron level as the high radiation material, the radiation material with the dimension can be mutually permeated with the cold spraying heat conducting framework, and the submicron radiation material is filled in the gaps on the surface of the net-shaped metal structure layer prepared by cold spraying, thereby further obviously reducing the interface thermal resistance between the radiation material and the heat conducting coating and improving the heat radiation efficiency of the titanium alloy.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of a heat-conducting radiation-dissipating composite coating suitable for titanium alloy according to the present invention.
Fig. 2 is a schematic cross-sectional structure view of a heat-conducting radiation-dissipating composite coating suitable for titanium alloy according to the present invention.
Description of reference numerals:
1-a titanium alloy substrate; 2-a reticular metal structure layer; 3-coating with non-metal oxide.
Detailed Description
As shown in fig. 1 and fig. 2, the heat-conducting, radiation-dissipating composite coatings suitable for titanium alloy in embodiments 1 to 4 of the present invention are composed of a mesh-shaped metal structure layer 2 coated on a titanium alloy substrate 1 and having a heat-conducting function, and a non-metal oxide coating 3 coated on the mesh-shaped metal structure layer 2 and having a radiation-dissipating function.
Example 1
The composite coating of this example was prepared by the following steps:
step one, spraying copper powder with the granularity of 20-40 mu m on the surface of the titanium alloy by adopting a cold spraying method to form a net-shaped metal structure layer; the pressure of cold spraying is 1MPa, the spraying distance is 20mm, the spraying gas is nitrogen, and the preheating temperature of the spraying gas is 350 ℃; the mesh shape in the reticular metal structure layer is a parallelogram, the acute angle of the parallelogram is 45 degrees, the length of the lower bottom edge is 10mm, the height is 10mm, and the thickness of the reticular metal structure layer is 5 mm;
step two, adding powder of the nano SiC-spinel-oxide composite material into a water glass solvent, then adding phenolic resin to obtain mixed slurry, spraying the mixed slurry on the reticular metal structure layer obtained in the step one by adopting a spraying solidification method, drying and solidifying at 120 ℃ to form a non-metal oxide coating, and obtaining a composite coating on the surface of the titanium alloy; nano SiC and CaCO in the nano SiC-spinel-oxide composite material3、Al2O3、Fe2O3And SiO2The volume ratio of the nano SiC-spinel-oxide composite material to the nano SiC-spinel-oxide composite material is 1:2:1:1, the nano SiC-spinel-oxide composite material powder is prepared by a high-energy ball milling method, and the particle size of the nano SiC-spinel-oxide composite material powder is 100 nm-1000 nm; the mass content of the powder of the nano SiC-spinel-oxide composite material in the mixed slurry is 30%, and the mass content of the phenolic resin is 10%; the thermal conductivity of the composite coating is 250W/m.K, and the infrared emissivity of the wave band of 5-20 mu m is not less than 0.95.
The soft metal powder in this embodiment may also be a copper alloy, aluminum alloy, gold, silver, or nickel.
Example 2
The composite coating of this example was prepared by the following steps:
step one, spraying aluminum powder with the granularity of 20-40 mu m on the surface of the titanium alloy by adopting a cold spraying method to form a net-shaped metal structure layer; the pressure of cold spraying is 2MPa, the spraying distance is 40mm, the spraying gas is nitrogen, and the preheating temperature of the spraying gas is 220 ℃; the mesh shape in the reticular metal structure layer is a parallelogram, the acute angle of the parallelogram is 90 degrees, the length of the lower bottom edge is 30mm, the height is 30mm, and the thickness of the reticular metal structure layer is 10 mm;
step two, adding powder of the nano SiC-spinel-oxide composite material into a water glass solvent, then adding phenolic resin to obtain mixed slurry, spraying the mixed slurry on the reticular metal structure layer obtained in the step one by adopting a spraying solidification method, drying and solidifying at 120 ℃ to form a non-metal oxide coating, and obtaining a composite coating on the surface of the titanium alloy; nano SiC and CaCO in the nano SiC-spinel-oxide composite material3、Al2O3、Fe2O3And SiO2The volume ratio of the nano SiC-spinel-oxide composite material to the nano SiC-spinel-oxide composite material is 1:2:1:1, the nano SiC-spinel-oxide composite material powder is prepared by a high-energy ball milling method, and the particle size of the nano SiC-spinel-oxide composite material powder is 100 nm-1000 nm; the mass content of the powder of the nano SiC-spinel-oxide composite material in the mixed slurry is 65%, and the mass content of the phenolic resin is 20%; the thermal conductivity of the composite coating is 100W/m.K, and the infrared emissivity of a wave band of 5-20 mu m is not less than 0.95.
The soft metal powder in this embodiment may also be a copper alloy, aluminum alloy, gold, silver, or nickel.
Example 3
The composite coating of this example was prepared by the following steps:
step one, spraying gold powder with the granularity of 20-40 mu m on the surface of the titanium alloy by adopting a cold spraying method to form a net-shaped metal structure layer; the pressure of cold spraying is 1MPa, the spraying distance is 20mm, the spraying gas is nitrogen, and the preheating temperature of the spraying gas is 350 ℃; the mesh shape in the reticular metal structure layer is a parallelogram, the acute angle of the parallelogram is 45 degrees, the length of the lower bottom edge is 10mm, the height is 10mm, and the thickness of the reticular metal structure layer is 5 mm;
secondly, adding powder of the nano SiC-spinel-oxide composite material into a water glass solvent, then adding phenolic resin to obtain mixed slurry, and spraying and curing the mixed slurrySpraying the mixed slurry on the reticular metal structure layer obtained in the step one, drying and curing at 120 ℃ to form a non-metallic oxide coating, and obtaining a composite coating on the surface of the titanium alloy; nano SiC and CaCO in the nano SiC-spinel-oxide composite material3、Al2O3、Fe2O3And SiO2The volume ratio of the nano SiC-spinel-oxide composite material to the nano SiC-spinel-oxide composite material is 1:2:1:1, the nano SiC-spinel-oxide composite material powder is prepared by a high-energy ball milling method, and the particle size of the nano SiC-spinel-oxide composite material powder is 100 nm-1000 nm; the mass content of the powder of the nano SiC-spinel-oxide composite material in the mixed slurry is 35%, and the mass content of the phenolic resin is 10%; the thermal conductivity of the composite coating is 250W/m.K, and the infrared emissivity of the wave band of 5-20 mu m is not less than 0.95.
The soft metal powder in this embodiment may also be copper, copper alloy, aluminum alloy, silver, or nickel in composition.
Example 4
The composite coating of this example was prepared by the following steps:
step one, spraying silver powder with the granularity of 20-40 mu m on the surface of the titanium alloy by adopting a cold spraying method to form a net-shaped metal structure layer; the pressure of cold spraying is 1.5MPa, the spraying distance is 30mm, the spraying gas is nitrogen, and the preheating temperature of the spraying gas is 300 ℃; the mesh shape in the reticular metal structure layer is a parallelogram, the acute angle of the parallelogram is 65 degrees, the length of the lower bottom edge is 20mm, the height is 20mm, and the thickness of the reticular metal structure layer is 8 mm;
step two, adding powder of the nano SiC-spinel-oxide composite material into a water glass solvent, then adding phenolic resin to obtain mixed slurry, spraying the mixed slurry on the reticular metal structure layer obtained in the step one by adopting a spraying solidification method, drying and solidifying at 120 ℃ to form a non-metal oxide coating, and obtaining a composite coating on the surface of the titanium alloy; nano SiC and CaCO in the nano SiC-spinel-oxide composite material3、Al2O3、Fe2O3And SiO2The volume ratio of (1: 2:1:1: 1),the powder of the nano SiC-spinel-oxide composite material is prepared by a high-energy ball milling method, and the granularity of the powder of the nano SiC-spinel-oxide composite material is 100 nm-1000 nm; the mass content of the powder of the nano SiC-spinel-oxide composite material in the mixed slurry is 50%, and the mass content of the phenolic resin is 15%; the thermal conductivity of the composite coating is 400W/m.K, and the infrared emissivity of the wave band of 5-20 microns is not less than 0.95.
The soft metal powder in this embodiment may also be copper, copper alloy, aluminum alloy, gold, or nickel.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.

Claims (5)

1. The heat-conducting radiation heat-dissipating composite coating suitable for the titanium alloy is characterized by comprising a net-shaped metal structure layer with a heat-conducting function and a non-metallic oxide coating which is coated on the net-shaped metal structure layer and has a radiation heat-dissipating function, wherein the heat-dissipating composite coating is prepared by the following steps:
step one, spraying soft metal powder with thermal conductivity superior to that of titanium alloy on the surface of the titanium alloy by adopting a cold spraying method to form a net-shaped metal structure layer;
step two, adding powder of the nano SiC-spinel-oxide composite material into a water glass solvent, then adding phenolic resin to obtain mixed slurry, spraying the mixed slurry on the reticular metal structure layer obtained in the step one by adopting a spraying solidification method, and drying and solidifying to form a non-metallic oxide coating, thereby obtaining a heat dissipation composite coating on the surface of the titanium alloy; the thermal conductivity of the composite coating is not less than 100W/m.K, and the infrared emissivity of a wave band of 5-20 microns is not less than 0.95.
2. The heat conduction, radiation and dissipation composite coating suitable for titanium alloy as claimed in claim 1, wherein in step one, the soft metal powder comprises copper, copper alloy, aluminum alloy, gold, silver or nickel, and the particle size of the soft metal powder is 20 μm to 40 μm.
3. A heat conductive radiation heat dissipating composite coating suitable for titanium alloy as claimed in claim 1, wherein in the first step, the mesh shape of the mesh metal structure layer is parallelogram, the acute angle of the parallelogram is 45 ° to 90 °, the length of the lower base is 10mm to 30mm, the height is 10mm to 30mm, and the thickness of the mesh metal structure layer is 5mm to 10 mm.
4. The heat conducting radiation dissipating composite coating suitable for titanium alloy as set forth in claim 1, wherein the oxide in the SiC-spinel-oxide composite material in step two is CaCO3、Al2O3、Fe2O3And SiO2The powder of the nano SiC-spinel-oxide composite material is prepared by a high-energy ball milling method, and the particle size of the powder of the nano SiC-spinel-oxide composite material is in a submicron level.
5. The heat conduction, radiation and dissipation composite coating suitable for the titanium alloy as claimed in claim 1, wherein the mass content of the powder of the nano SiC-spinel-oxide composite material in the mixed slurry in the second step is 35% to 65%, and the mass content of the phenolic resin is 10% to 20%.
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Publication number Priority date Publication date Assignee Title
CN110986037A (en) * 2019-12-20 2020-04-10 张学昌 Method for improving boiler combustion thermal efficiency by adopting light energy conversion
CN112536572A (en) * 2020-11-25 2021-03-23 东莞仁海科技股份有限公司 Manufacturing process of cold spray capillary structure temperature-equalizing plate for radiator
CN112949064A (en) * 2021-03-04 2021-06-11 浙江大学 Optimal design method of efficient light flexible heat conduction chain based on graphene macroscopic assembly film
CN113795056A (en) * 2021-09-17 2021-12-14 福建辉伦婴童用品有限公司 Electric heating plate and preparation method thereof

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CN104088003A (en) * 2014-07-28 2014-10-08 哈尔滨工业大学 Preparation method of heat-conducting and high-radiation composite coating material on surface of aluminum alloy radiator of LED (Light Emitting Diode) lamp
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Publication number Priority date Publication date Assignee Title
CN110986037A (en) * 2019-12-20 2020-04-10 张学昌 Method for improving boiler combustion thermal efficiency by adopting light energy conversion
CN112536572A (en) * 2020-11-25 2021-03-23 东莞仁海科技股份有限公司 Manufacturing process of cold spray capillary structure temperature-equalizing plate for radiator
CN112949064A (en) * 2021-03-04 2021-06-11 浙江大学 Optimal design method of efficient light flexible heat conduction chain based on graphene macroscopic assembly film
CN112949064B (en) * 2021-03-04 2022-07-08 浙江大学 Optimal design method of efficient light flexible heat-conducting chain based on graphene film
CN113795056A (en) * 2021-09-17 2021-12-14 福建辉伦婴童用品有限公司 Electric heating plate and preparation method thereof

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