CN113136139A - High-strength long-life bonded solid lubricating coating and preparation method and application thereof - Google Patents
High-strength long-life bonded solid lubricating coating and preparation method and application thereof Download PDFInfo
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- 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
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/61—Additives non-macromolecular inorganic
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Abstract
The invention relates to the technical field of surface coatings, in particular to a high-strength long-life bonded solid lubricating coating, and a preparation method and application thereof. The invention provides a high-strength long-life bonded solid lubricating coating which comprises the following preparation raw materials in percentage by mass: 10-25% of polyamide-imide resin, 1-5% of amino tetra-functional group epoxy resin, 6-12% of transition metal sulfide, 0.1-1% of nano rare earth metal fluoride and the balance of solvent; the transition metal in the transition metal sulfide is a metal of a VIB group. The high-strength long-life bonded solid lubricating coating can meet the requirements of low-temperature curing and high strength long life.
Description
Technical Field
The invention relates to the technical field of surface coatings, in particular to a high-strength long-life bonded solid lubricating coating, and a preparation method and application thereof.
Background
The solid lubricating coating is adhered by using the excellent adhesive capacity of organic or inorganic resin cured to the surface of the base material to adhere the solid lubricant and other functional stuffing dispersed in the resin system to the surface of the mechanical part, and this solves the problems of mechanical wear, lubrication, cold welding, etc. in special work condition. The application of the inorganic bonding solid lubricating coating is limited due to low adhesive force, high brittleness and poor wear resistance, and the organic bonding solid lubricating coating has more excellent performance than the inorganic bonding solid lubricating coating, wherein the polyimide-based organic bonding solid lubricating coating has excellent space environment resistance, low friction coefficient and long service life and is widely applied to the high and new technical fields of aviation, aerospace, nuclear technology and the like. Since the 21 st century, aerospace has shown a much broader prospect, with high or ultra-high levels of aerospace activity being more frequent, in order to improve the reliability, reduce the cost and reduce the weight, the aerospace equipment parts are developed towards light weight, precision, thin wall and complicated shape, most mechanisms and key positions in a structural system of the system all adopt lightweight aluminum alloy materials, and the aluminum alloy materials are subjected to severe environments such as cold-heat alternation (-150 to +150 ℃), space irradiation (vacuum, ultraviolet and atomic oxygen), extremely low vacuum and the like after being exposed in a space environment for a long time, in such an environment, the metal contact surface is abraded and adhered due to vibration, so that cold welding is easy to occur (namely two pieces of contact metal are adhered together in an extremely low vacuum environment of the outer space), and the whole mechanism cannot work normally and fails. Although the invention discloses a lubricating protective coating with excellent space environment resistance, the coating needs to be crosslinked and cured at 280 ℃ to exert the optimal performance of the coating, the high curing temperature limits the application of the coating to certain metal parts with lower heat treatment temperature, such as aluminum, copper and other parts, and the requirement of lightweight development of aerospace equipment cannot be met. Therefore, a high-performance lubricating protective coating which can be cured at low temperature and has high reliability and long service life in a space irradiation vacuum environment is needed, the problems of lubrication and cold welding between a mechanism and parts at key positions in a harsh space environment are solved, and the use requirements of high reliability and long service life of space equipment are met.
Disclosure of Invention
The invention aims to provide a high-strength long-life bonded solid lubricating coating, and a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a high-strength long-life bonded solid lubricating coating which comprises the following preparation raw materials in percentage by mass: 10-25% of polyamide-imide resin, 1-5% of amino tetra-functional group epoxy resin, 6-12% of transition metal sulfide, 0.1-1% of nano rare earth metal fluoride and the balance of solvent;
the transition metal in the transition metal sulfide is a metal of a VIB group.
Preferably, the amino tetrafunctional epoxy resin is epoxy resin AG-80.
Preferably, the transition metal sulfide has a particle size of less than 5 μm.
Preferably, the transition metal sulfide comprises molybdenum disulfide and/or tungsten disulfide.
Preferably, the particle size of the nano rare earth metal fluoride is less than 50 nm.
Preferably, the nano rare earth metal fluoride comprises nano lanthanum trifluoride and/or nano cerium trifluoride.
Preferably, the solvent includes N, N-dimethylformamide and 1-methyl-2-pyrrolidone.
Preferably, the mass ratio of the N, N-dimethylformamide to the 1-methyl-2-pyrrolidone is (25-75): (75-25).
The invention also provides a preparation method of the high-strength long-life bonded solid lubricating coating, which comprises the following steps:
mixing polyamide-imide resin, amino tetrafunctional group epoxy resin and a first part of solvent to obtain a resin system;
mixing and ball-milling the transition metal sulfide, the nano rare earth metal fluoride and the second part of solvent to obtain a dispersing material;
mixing the resin system, the dispersing material and the third part of solvent to obtain a coating;
coating the coating on the surface of a substrate, and curing to obtain the high-strength long-life bonded solid lubricating coating;
the total mass of the first part of solvent, the second part of solvent and the third part of solvent is the mass of the solvent in the technical scheme;
the temperature of the curing is 170 +/-5 ℃.
The invention also provides the application of the high-strength long-life bonded solid lubricating coating or the high-strength long-life bonded solid lubricating coating prepared by the preparation method in the technical scheme in the aerospace field.
The invention provides a high-strength long-life bonded solid lubricating coating which comprises the following preparation raw materials in percentage by mass: 10-25% of polyamide-imide resin, 1-5% of amino tetra-functional group epoxy resin, 6-12% of transition metal sulfide, 0.1-1% of nano rare earth metal fluoride and the balance of solvent; the transition metal in the transition metal sulfide is a metal of a VIB group. In the invention, the polyamide-imide resin and the epoxy resin are used as binders, the transition metal sulfide is used as a lubricant, and the nano rare earth metal fluoride is used as an additive; the invention utilizes the epoxy resin to modify the polyamide-imide, reduces the crosslinking curing temperature of the polyamide-imide coating on the basis of ensuring that the strength of the coating is not reduced and the service life is not reduced, can solve the long-acting lubrication and wear resistance problem of the surface of metal parts (such as aluminum and copper) which can not be heated at high temperature, can be applied to other metal surfaces, and has wide application prospect.
Compared with the prior art, the invention has the following excellent effects:
1) in order to reduce the curing temperature of the polyamideimide, the amino tetrafunctional group epoxy resin is added, active hydrogen provided by amino, hydroxyl or carboxyl groups on a polyamideimide molecular chain is utilized to enable epoxy groups in the amino tetrafunctional group epoxy resin to open rings to generate addition reaction, and then the epoxy resin is subjected to crosslinking curing, so that a network structure formed by crosslinking the epoxy resin and the polyamideimide resin is formed, and the curing temperature of the polyamideimide is greatly reduced;
2) since transition metal sulfides have a lower coefficient of friction in vacuum than in air and their use temperature in vacuum is higher than in air, they are ideal space lubricants. The good friction mechanical property of the coating under vacuum is utilized to ensure the lubricating and cold welding preventing effect of the coating under vacuum;
3) the nanometer rare earth metal fluoride can generate a synergistic effect with the transition metal sulfide, so that the wear resistance of the coating is improved, and the high-temperature oxidation of the transition metal sulfide is inhibited;
4) according to the description of the embodiment, the solid lubricating coating disclosed by the invention has good adhesion to a metal substrate, excellent friction mechanical properties, a low friction coefficient and a long wear-resisting life especially in a low-temperature and vacuum environment.
Drawings
FIG. 1 is an infrared spectrum of solid lubricating coatings prepared in example 1 and comparative example 1;
FIG. 2 is a schematic structural view of an aircraft door slide rail to which the solid lubricating coating described in example 2 is applied;
fig. 3 is a partial photograph of an aircraft door slide rail sprayed with the solid lubricant coating described in example 2 after 10 ten thousand uses.
Detailed Description
The invention provides a high-strength long-life bonded solid lubricating coating which comprises the following preparation raw materials in percentage by mass: 10-25% of polyamide-imide resin, 1-5% of amino tetra-functional group epoxy resin, 6-12% of transition metal sulfide, 0.1-1% of nano rare earth metal fluoride and the balance of solvent;
the transition metal in the transition metal sulfide is a metal of a VIB group.
In the present invention, all the starting materials for the preparation are commercially available products known to those skilled in the art unless otherwise specified.
According to the mass percentage, the solid lubricating coating comprises 10-25% of polyamide-imide resin, preferably 13-21%, and more preferably 15-18%. In the invention, the well-known glass transition temperature of the polyimide is preferably 250-300 ℃, the heat deformation temperature is preferably 270 ℃, and the use temperature is preferably-195-230 ℃. The polyimide resin of the present invention is not particularly limited in kind, and those known to those skilled in the art can be used to satisfy the above requirements. In a specific embodiment of the present invention, the polyamideimide resin is preferably available from technologies, Inc. of Walsh, Beijing.
In the invention, the solid lubricating coating comprises polyamide-imide resin which is a polymer with imide rings and amido bonds regularly and alternately arranged, the polyamide-imide resin has excellent mechanical properties, good radiation resistance and oxidation resistance, high and low temperature resistance and high chemical stability at 250 ℃, and the polyamide-imide resin used as a binder of the solid lubricating coating has strong ultraviolet resistance, atomic oxygen radiation resistance and good tribological performance.
According to the mass percentage, the solid lubricating coating comprises 1-5% of amino tetrafunctional group epoxy resin, preferably 2-4%, and more preferably 2.5-3.5%. In the invention, the structural formula of the amino tetrafunctional group epoxy resin is shown as formula 1:
in the present invention, the specific type of the amino tetrafunctional epoxy resin is preferably epoxy resin AG-80. The epoxy value of the epoxy resin AG-80 is preferably 0.85, and the epoxy value is 100 g/epoxy unit amount. In the present invention, the epoxy resin AG-80 preferably has a viscosity of 3.5 pas at a temperature of 50. + -. 0.5 ℃.
In the invention, modification of the polyamide imide can be realized by adding the amino tetrafunctional group, and the curing temperature of the polyamide imide can be greatly reduced.
According to the mass percentage, the solid lubricating coating comprises 6-12% of transition metal sulfide, preferably 7-11% of transition metal sulfide, and more preferably 8-10% of transition metal sulfide. In the present invention, the transition metal in the transition metal sulfide is preferably a group vib metal, and the transition metal sulfide is more preferably molybdenum disulfide and/or tungsten disulfide; when the transition metal sulfide is molybdenum disulfide and tungsten disulfide, the proportion of the molybdenum disulfide and the tungsten disulfide is not limited in any special way, and the molybdenum disulfide and the tungsten disulfide are mixed according to any proportion. In the present invention, the particle size of the transition metal is preferably less than 5 μm. In the present invention, the purity of the transition metal is preferably more than 98%.
In the invention, the transition metal sulfide is a solid lubricant, and the transition metal sulfide can improve the lubricating cold welding prevention effect of the solid lubricating coating under vacuum.
According to the mass percentage, the solid lubricating coating comprises 0.1-1% of nano rare earth metal fluoride, preferably 0.2-0.8%, and more preferably 0.3-0.5%. In the invention, the particle size of the nano rare earth metal fluoride is preferably less than 50nm, more preferably 5-30 nm, and most preferably 10-20 nm. In the present invention, the nano rare earth metal fluoride preferably includes lanthanum trifluoride and/or cerium trifluoride; when the nanometer rare earth metal fluoride comprises lanthanum trifluoride and cerium trifluoride, the proportion of the lanthanum trifluoride and the cerium trifluoride is not limited at all, and the lanthanum trifluoride and the cerium trifluoride can be mixed according to any proportion.
In the invention, the nano rare earth metal fluoride as an additive can generate a synergistic effect with the transition metal sulfide, so that the wear resistance of the solid lubricating coating is improved, and the high-temperature oxidation of the transition metal sulfide is inhibited.
The solid lubricating coating comprises a balance of solvent, wherein the solvent preferably comprises N, N-dimethylformamide and 1-methyl-2-pyrrolidone; the mass ratio of the N, N-dimethylformamide to the 1-methyl-2-pyrrolidone is preferably (25-75): (75-25), more preferably (30-65): (35-70). Most preferably (45-60): (40-55).
In the invention, the solvent adopts a mixed solvent of N, N-dimethylformamide and 1-methyl-2-pyrrolidone with a specific ratio, which is beneficial to dissolving the polyamide-imide resin and volatilizing the solvent in the coating preparation process, compared with other solvents, the solvent has the advantages of higher polarity, capability of completely dissolving the polyamide-imide resin and higher volatilization speed of the solvent in the coating preparation process relative to a single solvent.
The invention also provides a preparation method of the high-strength long-life bonded solid lubricating coating, which comprises the following steps:
mixing polyamide-imide resin, epoxy resin and a first part of solvent to obtain a resin system;
mixing and ball-milling the transition metal sulfide, the nano rare earth metal fluoride and the second part of solvent to obtain a dispersing material;
mixing the resin system, the dispersing material and the third part of solvent to obtain a coating;
coating the coating on the surface of a substrate, and curing to obtain the high-strength long-life bonded solid lubricating coating;
the total mass of the first part of solvent, the second part of solvent and the third part of solvent is the mass of the solvent in the technical scheme;
the temperature of the curing is 170 +/-5 ℃.
And mixing the polyamide-imide resin, the epoxy resin and the first part of solvent to obtain a resin system. The present invention does not limit the mixing in any particular way, and the mixing may be carried out by a process known to those skilled in the art. In the invention, the solid content of the resin system is preferably 30-60%, and more preferably 40-50%.
The invention mixes and ball-mills transition metal sulfide, nanometer rare earth metal fluoride and the second part of solvent to obtain the dispersing material. In the present invention, the ratio of the total mass of the transition metal sulfide and the nano rare earth metal fluoride to the mass of the first part solvent is preferably 1: (1-2), more preferably 1: (1.3-1.6). In the present invention, the mixing is preferably ball milling, and the ball milling process is not limited in any way, and can be performed by a process known to those skilled in the art.
After the resin system and the dispersing material are obtained, the resin system, the dispersing material and the third part of solvent are mixed to obtain the coating.
In the present invention, the mixing is preferably performed under stirring conditions, and the stirring process is not particularly limited, and may be performed by a process known to those skilled in the art to ensure uniform mixing.
After the coating is obtained, the coating is coated on the surface of a matrix and cured to obtain the high-strength long-life bonded solid lubricating coating.
In the present invention, the substrate is preferably a metal component of any material.
In the present invention, the coating is preferably performed in an oil-free compression control or a nitrogen atmosphere; the coating mode is preferably spraying; the spraying process is not particularly limited, and may be performed by a process known to those skilled in the art.
In the present invention, the curing temperature is 170 ± 5 ℃ and the time is preferably 1 h.
The invention also provides the application of the high-strength long-life bonded solid lubricating coating or the high-strength long-life bonded solid lubricating coating prepared by the preparation method in the technical scheme in the aerospace field. In the present invention, the application is preferably to solve the problems of lubrication and wear resistance between lightweight precision moving parts in extreme space environments.
The method of application is not particularly limited, and the application may be carried out by a method of applying a solid lubricating coating well known to those skilled in the art.
The high strength long life adherent solid lubricant coating provided by the present invention and the method of making and using the same are described in detail below with reference to the examples, but they should not be construed as limiting the scope of the invention.
Example 1
Preparing raw materials:
120g of polyamide-imide, 10.0g of epoxy resin (AG80), 90.0g of molybdenum disulfide (particle size is less than 5 mu m), 4.0g of nano lanthanum trifluoride (particle size is 20nm), and 500g of solvent (a mixed solution of N, N-dimethylformamide and 1-methyl-2-pyrrolidone in a volume ratio of 70: 30);
the preparation method comprises the following steps:
mixing polyamide imide, epoxy resin and 150g of solvent, and stirring until the polyamide imide, the epoxy resin and the solvent are fully dissolved to obtain a resin system;
mixing molybdenum disulfide, nano lanthanum trifluoride and 200g of solvent, and performing ball milling for 48 hours to obtain a dispersing material;
mixing the resin system, the dispersing material and 150g of solvent, and uniformly stirring to obtain a coating;
and spraying the coating on the surface of a part in an oil-free compressed air or nitrogen atmosphere, and curing for 1h at 170 ℃ to obtain the high-strength long-life bonded solid lubricating coating.
Example 2
Preparing raw materials:
120g of polyamide-imide, 10.0g of epoxy resin (AG80), 70.0g of molybdenum disulfide (particle size is less than 5 mu m), 4.0g of nano lanthanum trifluoride (particle size is 30nm), and 500g of solvent (a mixed solution of N, N-dimethylformamide and 1-methyl-2-pyrrolidone in a volume ratio of 60: 40);
the preparation process is referred to example 1.
Example 3
Preparing raw materials:
120g of polyamide-imide, 15.0g of epoxy resin (AG80), 90.0g of molybdenum disulfide (particle size is less than 5 mu m), 4.0g of nano lanthanum trifluoride (particle size is 10nm), and 500g of solvent (a mixed solution of N, N-dimethylformamide and 1-methyl-2-pyrrolidone in a volume ratio of 50: 50);
the preparation process is referred to example 1.
Example 4
Preparing raw materials:
120g of polyamide-imide, 15.0g of epoxy resin (AG80), 70.0g of molybdenum disulfide (particle size is less than 5 mu m), 4.0g of nano lanthanum trifluoride (particle size is 20nm), and 500g of solvent (a mixed solution of N, N-dimethylformamide and 1-methyl-2-pyrrolidone in a volume ratio of 40: 60);
the preparation process is referred to example 1.
Example 5
Preparing raw materials:
120g of polyamide-imide, 15.0g of epoxy resin (AG80), 90.0g of molybdenum disulfide (particle size is less than 5 mu m), 8.0g of nano lanthanum trifluoride (particle size is 10nm), and 500g of solvent (a mixed solution of N, N-dimethylformamide and 1-methyl-2-pyrrolidone in a volume ratio of 50: 50);
the preparation process is referred to example 1.
Comparative example 1
Preparing raw materials:
120g of polyamide-imide, 90.0g of molybdenum disulfide (the particle size is less than 5 mu m), 4.0g of nano lanthanum trifluoride (the particle size is 20nm), and 500g of solvent (a mixed solution of N, N-dimethylformamide and 1-methyl-2-pyrrolidone in a volume ratio of 70: 30);
the preparation method comprises the following steps:
mixing polyamide imide with 150g of solvent, and stirring until the polyamide imide is fully dissolved to obtain a resin system;
mixing molybdenum disulfide, nano lanthanum trifluoride and 200g of solvent, and performing ball milling for 48 hours to obtain a dispersing material;
mixing the resin system, the dispersing material and 150g of solvent, and uniformly stirring to obtain a coating;
and spraying the coating on the surface of a part (the material of the part does not contain aluminum and copper) in an oil-free compressed air or nitrogen atmosphere, and curing at 280 ℃ for 1h to obtain the solid lubricating coating.
Test example 1
The solid lubricating coatings prepared in example 1 and comparative example 1 were subjected to infrared spectroscopy, and the test results are shown in fig. 1, and it can be seen from fig. 1 that the spectrum of the polyamide-imide resin with epoxy resin added after curing at 170 ℃ is consistent with the spectrum of the polyamide-imide resin without epoxy resin cured at 280 ℃, which indicates that the polyamide-imide resin modified by epoxy resin can be completely cured at 170 ℃;
the high strength long life bonded solid lubricant coatings prepared in examples 1-5 were tested for performance, with the test results and test criteria shown in table 1:
TABLE 1 Performance indices of the resulting high strength long life bonded solid lubricant coatings prepared in examples 1-5
Note: in table 1, the abrasion resistance of the coating was evaluated by using a home-made MHK-500A ring-block friction abrasion tester, and the friction coefficient and abrasion resistance of the coating were measured, and the abrasion resistance of the coating was expressed by the friction stroke m/μm taken per film thickness;
the vacuum tribology performance and the wear resistance in the low-temperature tribology were evaluated using a vacuum wear tester, the dual ball was a GCr15 steel ball with a diameter of 3m and a rotation diameter of 6mm, and the wear resistance of the coating refers to the time for which the coating was worn through at the same coating thickness under the same test conditions.
Application example
The solid lubricating coating of example 2 was applied according to the preparation method thereof, except that the object to be sprayed was replaced with a metallic part made of an aluminum or titanium alloy material such as a compression release device, a pin, a tie rod, a support ring, a tie rod joint, a ratchet shaft, a bushing screw, or the likeThe obtained parts coated with the solid lubricating coating are arranged on the surface of the workpiece in a simulated space environment (vacuum degree of 4.8 multiplied by 10)-4Pa, low temperature-160 ℃) and respectively carrying out vacuum tribology performance and low temperature tribology performance tests, wherein the test result is that the vacuum degree is 4.8 multiplied by 10-4The wear-resisting service lives of the coating at the lower temperature and the lower temperature of-160 ℃ are respectively 60 minutes and 66 minutes, and the requirement of the aerospace field on the wear-resisting property can be met; the solid lubricating coating can meet the requirements of light small parts such as aluminum on high precision and high reliability;
the solid lubricating coating in the embodiment 2 is applied according to the preparation method, and the difference is that the spraying object is replaced by an airplane cabin door slide rail (the slide rail of the airplane cabin door is shown in fig. 2), and after 10 ten thousand use tests are carried out under the actual working condition of the cabin door (the load is 15kg, the sliding speed is 25m/min), a photograph of the cabin door slide rail coated with the solid lubricating coating is shown in fig. 3, as can be seen from fig. 3, the coating on the cabin door slide rail is not worn away after 10 ten thousand operation, which indicates that the coating has excellent performances of high bearing capacity, long waiting life and the like, and the cabin door slide rail coated with the coating meets the use requirement of 10 ten thousand factory configuration.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The high-strength long-life bonded solid lubricating coating is characterized by comprising the following preparation raw materials in percentage by mass: 10-25% of polyamide-imide resin, 1-5% of amino tetra-functional group epoxy resin, 6-12% of transition metal sulfide, 0.1-1% of nano rare earth metal fluoride and the balance of solvent;
the transition metal in the transition metal sulfide is a metal of a VIB group.
2. The high strength long life adherent solid lubricant coating of claim 1, wherein the aminotetrafunctional epoxy resin is epoxy resin AG-80.
3. The high strength long life adherent solid lubricant coating of claim 1, wherein the transition metal sulfide has a particle size of less than 5 μm.
4. A high strength long life bonded solid lubricant coating as claimed in claim 1 or 3, wherein the transition metal sulphide comprises molybdenum disulphide and/or tungsten disulphide.
5. The high strength long life adherent solid lubricant coating of claim 1, wherein the nano rare earth metal fluoride has a particle size of less than 50 nm.
6. The high strength long life adherent solid lubricant coating of claim 1 or 5, wherein the nano rare earth metal fluoride comprises nano lanthanum trifluoride and/or nano cerium trifluoride.
7. The high strength long life adherent solid lubricant coating of claim 1, wherein the solvent comprises N, N-dimethylformamide and 1-methyl-2-pyrrolidone.
8. The high strength long life adherent solid lubricant coating of claim 7, wherein the mass ratio of N, N-dimethylformamide to 1-methyl-2-pyrrolidone is (25 to 75): (75-25).
9. The method of producing a high strength long life adherent solid lubricant coating of any of claims 1 to 8, comprising the steps of:
mixing polyamide-imide resin, amino tetrafunctional group epoxy resin and a first part of solvent to obtain a resin system;
mixing and ball-milling the transition metal sulfide, the nano rare earth metal fluoride and the second part of solvent to obtain a dispersing material;
mixing the resin system, the dispersing material and the third part of solvent to obtain a coating;
coating the coating on the surface of a substrate, and curing to obtain the high-strength long-life bonded solid lubricating coating;
the total mass of the first part of solvent, the second part of solvent and the third part of solvent is the mass of the solvent in any one of claims 1-8;
the temperature of the curing is 170 +/-5 ℃.
10. Use of a high strength long life bonded solid lubricant coating as defined in any one of claims 1 to 8 or a high strength long life bonded solid lubricant coating as produced by the method of claim 9 in the aerospace field.
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| CN115323326A (en) * | 2022-08-17 | 2022-11-11 | 中国科学院兰州化学物理研究所 | Preparation method and application of space atomic oxygen irradiation resistant long-life molybdenum disulfide-based composite film |
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| CN115323326A (en) * | 2022-08-17 | 2022-11-11 | 中国科学院兰州化学物理研究所 | Preparation method and application of space atomic oxygen irradiation resistant long-life molybdenum disulfide-based composite film |
| CN115323326B (en) * | 2022-08-17 | 2023-11-24 | 中国科学院兰州化学物理研究所 | Preparation method and application of long-life molybdenum disulfide-based composite film resistant to space atomic oxygen irradiation |
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