CN115894053B - Heat-resistant high-strength fastener material and preparation method thereof - Google Patents
Heat-resistant high-strength fastener material and preparation method thereof Download PDFInfo
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Abstract
The invention discloses a heat-resistant high-strength fastener material and a preparation method thereof, and relates to the technical field of fastener materials, wherein the heat-resistant high-strength fastener material comprises the following raw materials in parts by weight: 15-25 parts of silicon carbide fiber, 40-60 parts of carbon fiber, 5-8 parts of solid carbon nanofiber, 4-6 parts of nano silicon boride, 3-5 parts of nano zirconium carbide, 2-4 parts of niobium silicide, 8-10 parts of soluble rosin-based polyimide, 0.1-0.3 part of coupling agent and 0.5-0.8 part of ionic liquid; the heat-resistant high-strength fastener material disclosed by the invention has the advantages of good high temperature resistance, excellent mechanical properties, good stability and long service life.
Description
Technical Field
The invention relates to the technical field of fastener materials, in particular to a heat-resistant high-strength fastener material and a preparation method thereof.
Background
Fasteners play a role in coupling, positioning, sealing, etc. in mechanical components, and are the most widely used mechanical foundations. In recent years, with the continuous upsizing of various machines, equipment and constructional engineering and the continuous increasing of power and rotating speed, the working condition of the fastener is worse, the working stress is obviously improved, the demand for heat-resistant high-strength fastener materials is increased, and the performance requirement is also higher.
In the ultra-high temperature state, the service life of the general fastening piece made of metal materials is very short, for example, the heat resistance of the fastening piece made of steel or iron can not meet the requirements, and in addition, the strength of the fastening piece made of the existing graphite materials is low, so that the technical requirements of high temperature resistance of more than 1500 ℃ and bending strength of more than 100Mpa are difficult to be achieved. Other existing fastener materials have the technical defects of low oxidation resistance, poor ablation resistance, short service life of products, expensive raw materials, complex production process, very long production period, high energy consumption, high production cost and the like.
In order to solve the above problems, chinese patent application publication CN106830967B discloses a fastener made of heat-resistant high-strength carbon/ceramic material and a method for preparing the same. The composition of the carbon/ceramic material is as follows: 30-60% of disordered carbon fiber; 10-18% of carbon black; 10-20% of silicon powder; 8-16% of molybdenum powder; 6-12% silicon carbide; 3-10% of zirconia; 10-25% of glue solution, and firing at high temperature. The invention has very good high temperature resistance and good mechanical property at high temperature, and also has good corrosion resistance and good processing property, and can greatly reduce the preparation and processing cost. However, the oxidation resistance and thermal shock resistance of the fastener material remain to be further improved due to the raw materials and formulations.
Therefore, the heat-resistant high-strength fastener material with good high temperature resistance, excellent mechanical properties, stable performance and long service life and the preparation method thereof are developed, meet the market demand, have wide market value and application prospect, and have very important significance for promoting the further development of the heat-resistant fastener material.
Disclosure of Invention
The invention mainly aims to provide a heat-resistant high-strength fastener material with good high temperature resistance, excellent mechanical properties, good stability and long service life and a preparation method thereof.
In order to achieve the above purpose, the invention provides a heat-resistant high-strength fastener material, which comprises the following raw materials in parts by weight: 15-25 parts of silicon carbide fiber, 40-60 parts of carbon fiber, 5-8 parts of solid carbon nanofiber, 4-6 parts of nano silicon boride, 3-5 parts of nano zirconium carbide, 2-4 parts of niobium silicide, 8-10 parts of soluble rosin-based polyimide, 0.1-0.3 part of coupling agent and 0.5-0.8 part of ionic liquid.
Preferably, the ionic liquid is 1-allyl-3-vinylimidazole chloride.
Preferably, the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH 570.
Preferably, the soluble rosin-based polyimide is prepared according to the method of example 1 in chinese patent No. CN 102690414B.
Preferably, the particle size of the niobium silicide is 1-10 μm.
Preferably, the particle size of the nano zirconium carbide is 50nm; the particle size of the nano silicon boride is 60nm;
preferably, the average diameter of the solid carbon nanofiber is 10nm to 200nm, and the length-diameter ratio is (100 to 200): 1.
Preferably, the silicon carbide fiber is silicon carbide fiber SCS-ULTRA.
Preferably, the carbon fiber is carbon fiber CT50-4.8/280.
Another object of the present invention is to provide a method for preparing the heat-resistant high-strength fastener material, comprising the steps of:
step S1, mixing soluble rosin-based polyimide, a coupling agent and an ionic liquid to obtain a mixed material, adding the mixed material into an organic solvent, and uniformly stirring to obtain a mixed solution;
step S2, uniformly mixing silicon carbide fibers, carbon fibers, solid carbon nanofibers, nano silicon boride, nano zirconium carbide and niobium silicide according to parts by weight, adding the mixture into the mixed solution prepared in the step S1, and removing the solvent by rotary evaporation to obtain a blank;
s3, adding the blank manufactured in the step S2 into a die, and performing compression molding;
and S4, performing heat treatment on the blank subjected to the compression molding in the step S3 to obtain the heat-resistant high-strength fastener material.
Preferably, in the step S1, the mass ratio of the mixed material to the organic solvent is 1 (1-2); the organic solvent is at least one of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone.
Preferably, the temperature of the die in the step S3 is 145-165 ℃.
Preferably, the molding pressure of the compression molding in the step S3 is 15-25MPa, and the temperature is kept for 2-3 hours at 200-230 ℃ after the compression molding.
Preferably, the heat treatment in the step S4 is performed in a high-pressure sintering furnace, the heat treatment temperature is 1600-2100 ℃, and the heat treatment time is 2-4 hours.
Due to the application of the technical scheme, the invention has the following beneficial effects:
(1) The preparation method of the heat-resistant high-strength fastener material disclosed by the invention has the advantages of simple process, convenience in operation, high preparation efficiency and finished product qualification rate, small equipment dependence, suitability for continuous large-scale production, and good high-temperature resistance, mechanical properties and performance stability of the prepared material through reasonable selection of preparation process parameters.
(2) The invention discloses a heat-resistant high-strength fastener material which is prepared from the following raw materials in parts by weight: 15-25 parts of silicon carbide fiber, 40-60 parts of carbon fiber, 5-8 parts of solid carbon nanofiber, 4-6 parts of nano silicon boride, 3-5 parts of nano zirconium carbide, 2-4 parts of niobium silicide, 8-10 parts of soluble rosin-based polyimide, 0.1-0.3 part of coupling agent and 0.5-0.8 part of ionic liquid. Through the mutual matching and combined action of the raw materials, the manufactured fastener material has the advantages of good high temperature resistance, excellent mechanical properties, good stability and long service life. By adding the nanoscale modifiers such as the solid carbon nanofibers, the nano silicon boride and the nano zirconium carbide, the advantages of the nano materials are combined, and the interaction between the solid carbon nanofibers, the nano silicon boride and the nano zirconium carbide and other components is influenced, so that a multi-element effect can be generated, the high-temperature mechanical property of the material is improved, and the oxidation resistance and the silicon vapor corrosion resistance of the material are improved; meanwhile, through reasonable selection of the particle sizes of the nano material and other components, the compactness and the interpenetration of the fastener material can be improved, so that the high temperature resistance, the mechanical property and the stable performance are improved, and the service life of the fastener material is prolonged.
(3) According to the heat-resistant high-strength fastener material disclosed by the invention, the addition of the soluble rosin-based polyimide, the coupling agent and the ionic liquid can enhance the interaction among the components, so that the compactness and the interpenetration of the material are improved; in the heat treatment process, the materials are pyrolyzed to increase the total carbon content of the materials, and meanwhile, N is doped to be matched with other components, so that the prepared materials have smooth surfaces, no obvious air holes or deformation, compact overall structure, good high temperature resistance, excellent mechanical properties, good stability and long service life.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
Example 1
The heat-resistant high-strength fastener material comprises the following raw materials in parts by weight: 15 parts of silicon carbide fiber, 40 parts of carbon fiber, 5 parts of solid carbon nanofiber, 4 parts of nano silicon boride, 3 parts of nano zirconium carbide, 2 parts of niobium silicide, 8 parts of soluble rosin-based polyimide, 0.1 part of coupling agent and 0.5 part of ionic liquid.
The ionic liquid is 1-allyl-3-vinyl imidazole chloride; the coupling agent is a silane coupling agent KH550; the soluble rosin-based polyimide was prepared according to the method of example 1 in chinese patent publication CN 102690414B; the particle size of the niobium silicide is 10 mu m; the grain diameter of the nano zirconium carbide is 50nm; the particle size of the nano silicon boride is 60nm; the average diameter of the solid carbon nanofiber is 200nm, and the length-diameter ratio is 200:1; the silicon carbide fiber is silicon carbide fiber SCS-ULTRA; the carbon fiber is carbon fiber CT50-4.8/280.
The preparation method of the heat-resistant high-strength fastener material comprises the following steps:
step S1, mixing soluble rosin-based polyimide, a coupling agent and an ionic liquid to obtain a mixed material, adding the mixed material into an organic solvent, and uniformly stirring to obtain a mixed solution;
step S2, uniformly mixing silicon carbide fibers, carbon fibers, solid carbon nanofibers, nano silicon boride, nano zirconium carbide and niobium silicide according to parts by weight, adding the mixture into the mixed solution prepared in the step S1, and removing the solvent by rotary evaporation to obtain a blank;
s3, adding the blank manufactured in the step S2 into a die, and performing compression molding;
and S4, performing heat treatment on the blank subjected to the compression molding in the step S3 to obtain the heat-resistant high-strength fastener material.
The mass ratio of the mixed materials to the organic solvent in the step S1 is 1:1; the organic solvent is dimethyl sulfoxide; in the step S3, the temperature of the die during the compression molding is 145 ℃; and (3) the molding pressure of the compression molding in the step (S3) is 15MPa, and the temperature is kept for 2 hours at 200 ℃ after the compression molding.
The heat treatment in the step S4 is carried out in a high-pressure sintering furnace, the heat treatment temperature is 1600 ℃, and the heat treatment time is 2 hours.
Example 2
The heat-resistant high-strength fastener material comprises the following raw materials in parts by weight: 17 parts of silicon carbide fiber, 45 parts of carbon fiber, 6 parts of solid carbon nanofiber, 4.5 parts of nano silicon boride, 3.5 parts of nano zirconium carbide, 2.5 parts of niobium silicide, 8.5 parts of soluble rosin-based polyimide, 0.15 part of coupling agent and 0.6 part of ionic liquid.
The ionic liquid is 1-allyl-3-vinyl imidazole chloride; the coupling agent is silane coupling agent KH560; the soluble rosin-based polyimide was prepared according to the method of example 1 in chinese patent publication CN 102690414B; the particle size of the niobium silicide is 8 mu m; the grain diameter of the nano zirconium carbide is 50nm; the particle size of the nano silicon boride is 60nm; the average diameter of the solid carbon nanofiber is 140nm, and the length-diameter ratio is 170:1; the silicon carbide fiber is silicon carbide fiber SCS-ULTRA; the carbon fiber is carbon fiber CT50-4.8/280.
The preparation method of the heat-resistant high-strength fastener material comprises the following steps:
step S1, mixing soluble rosin-based polyimide, a coupling agent and an ionic liquid to obtain a mixed material, adding the mixed material into an organic solvent, and uniformly stirring to obtain a mixed solution;
step S2, uniformly mixing silicon carbide fibers, carbon fibers, solid carbon nanofibers, nano silicon boride, nano zirconium carbide and niobium silicide according to parts by weight, adding the mixture into the mixed solution prepared in the step S1, and removing the solvent by rotary evaporation to obtain a blank;
s3, adding the blank manufactured in the step S2 into a die, and performing compression molding;
and S4, performing heat treatment on the blank subjected to the compression molding in the step S3 to obtain the heat-resistant high-strength fastener material.
The mass ratio of the mixed materials to the organic solvent in the step S1 is 1:1.2; the organic solvent is N, N-dimethylformamide; in the step S3, the temperature of the die during the compression molding is 150 ℃; and (3) the molding pressure of the compression molding in the step (S3) is 17MPa, and the temperature is kept for 2.3 hours at 210 ℃ after the compression molding.
The heat treatment in the step S4 is carried out in a high-pressure sintering furnace, the heat treatment temperature is 1700 ℃, and the heat treatment time is 2.5h.
Example 3
The heat-resistant high-strength fastener material comprises the following raw materials in parts by weight: 20 parts of silicon carbide fiber, 50 parts of carbon fiber, 6.5 parts of solid carbon nanofiber, 5 parts of nano silicon boride, 4 parts of nano zirconium carbide, 3 parts of niobium silicide, 9 parts of soluble rosin-based polyimide, 0.2 part of coupling agent and 0.65 part of ionic liquid.
The ionic liquid is 1-allyl-3-vinyl imidazole chloride; the coupling agent is a silane coupling agent KH570; the soluble rosin-based polyimide was prepared according to the method of example 1 in chinese patent publication CN 102690414B; the particle size of the niobium silicide is 5 mu m; the grain diameter of the nano zirconium carbide is 50nm; the particle size of the nano silicon boride is 60nm; the average diameter of the solid carbon nanofiber is 90nm, and the length-diameter ratio is 150:1; the silicon carbide fiber is silicon carbide fiber SCS-ULTRA; the carbon fiber is carbon fiber CT50-4.8/280.
The preparation method of the heat-resistant high-strength fastener material comprises the following steps:
step S1, mixing soluble rosin-based polyimide, a coupling agent and an ionic liquid to obtain a mixed material, adding the mixed material into an organic solvent, and uniformly stirring to obtain a mixed solution;
step S2, uniformly mixing silicon carbide fibers, carbon fibers, solid carbon nanofibers, nano silicon boride, nano zirconium carbide and niobium silicide according to parts by weight, adding the mixture into the mixed solution prepared in the step S1, and removing the solvent by rotary evaporation to obtain a blank;
s3, adding the blank manufactured in the step S2 into a die, and performing compression molding;
and S4, performing heat treatment on the blank subjected to the compression molding in the step S3 to obtain the heat-resistant high-strength fastener material.
The mass ratio of the mixed materials to the organic solvent in the step S1 is 1:1.5; the organic solvent is N-methyl pyrrolidone; the temperature of the die in the step S3 is 155 ℃ during the compression molding; and (3) the molding pressure of the compression molding in the step (S3) is 20MPa, and the temperature is kept for 2.5 hours at 215 ℃ after the compression molding.
The heat treatment in the step S4 is performed in a high-pressure sintering furnace, the heat treatment temperature is 1900 ℃, and the heat treatment time is 3 hours.
Example 4
The heat-resistant high-strength fastener material comprises the following raw materials in parts by weight: 23 parts of silicon carbide fiber, 55 parts of carbon fiber, 7.5 parts of solid carbon nanofiber, 5.5 parts of nano silicon boride, 4.5 parts of nano zirconium carbide, 3.5 parts of niobium silicide, 9.5 parts of soluble rosin-based polyimide, 0.25 part of coupling agent and 0.75 part of ionic liquid.
The ionic liquid is 1-allyl-3-vinyl imidazole chloride; the coupling agent is a mixture formed by mixing a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH570 according to a mass ratio of 1:3:2; the soluble rosin-based polyimide was prepared according to the method of example 1 in chinese patent publication CN 102690414B; the particle size of the niobium silicide is 3 mu m; the grain diameter of the nano zirconium carbide is 50nm; the particle size of the nano silicon boride is 60nm; the average diameter of the solid carbon nanofiber is 30nm, and the length-diameter ratio is 120:1; the silicon carbide fiber is silicon carbide fiber SCS-ULTRA; the carbon fiber is carbon fiber CT50-4.8/280.
The preparation method of the heat-resistant high-strength fastener material comprises the following steps:
step S1, mixing soluble rosin-based polyimide, a coupling agent and an ionic liquid to obtain a mixed material, adding the mixed material into an organic solvent, and uniformly stirring to obtain a mixed solution;
step S2, uniformly mixing silicon carbide fibers, carbon fibers, solid carbon nanofibers, nano silicon boride, nano zirconium carbide and niobium silicide according to parts by weight, adding the mixture into the mixed solution prepared in the step S1, and removing the solvent by rotary evaporation to obtain a blank;
s3, adding the blank manufactured in the step S2 into a die, and performing compression molding;
and S4, performing heat treatment on the blank subjected to the compression molding in the step S3 to obtain the heat-resistant high-strength fastener material.
The mass ratio of the mixed materials to the organic solvent in the step S1 is 1:1.8; the organic solvent is a mixture formed by mixing dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone according to a mass ratio of 1:3:5; in the step S3, the temperature of the die during the compression molding is 160 ℃; the molding pressure of the compression molding in the step S3 is 23MPa, and the temperature is kept for 2.8 hours at 225 ℃ after the compression molding.
The heat treatment in the step S4 is carried out in a high-pressure sintering furnace, the heat treatment temperature is 2000 ℃, and the heat treatment time is 3.5 hours.
Example 5
The heat-resistant high-strength fastener material comprises the following raw materials in parts by weight: 25 parts of silicon carbide fiber, 60 parts of carbon fiber, 8 parts of solid carbon nanofiber, 6 parts of nano silicon boride, 5 parts of nano zirconium carbide, 4 parts of niobium silicide, 10 parts of soluble rosin-based polyimide, 0.3 part of coupling agent and 0.8 part of ionic liquid.
The ionic liquid is 1-allyl-3-vinyl imidazole chloride; the coupling agent is a silane coupling agent KH550; the soluble rosin-based polyimide was prepared according to the method of example 1 in chinese patent publication CN 102690414B; the particle size of the niobium silicide is 1 mu m; the grain diameter of the nano zirconium carbide is 50nm; the particle size of the nano silicon boride is 60nm; the average diameter of the solid carbon nanofiber is 10nm, and the length-diameter ratio is 100:1; the silicon carbide fiber is silicon carbide fiber SCS-ULTRA; the carbon fiber is carbon fiber CT50-4.8/280.
The preparation method of the heat-resistant high-strength fastener material comprises the following steps:
step S1, mixing soluble rosin-based polyimide, a coupling agent and an ionic liquid to obtain a mixed material, adding the mixed material into an organic solvent, and uniformly stirring to obtain a mixed solution;
step S2, uniformly mixing silicon carbide fibers, carbon fibers, solid carbon nanofibers, nano silicon boride, nano zirconium carbide and niobium silicide according to parts by weight, adding the mixture into the mixed solution prepared in the step S1, and removing the solvent by rotary evaporation to obtain a blank;
s3, adding the blank manufactured in the step S2 into a die, and performing compression molding;
and S4, performing heat treatment on the blank subjected to the compression molding in the step S3 to obtain the heat-resistant high-strength fastener material.
The mass ratio of the mixed materials to the organic solvent in the step S1 is 1:2; the organic solvent is N-methyl pyrrolidone; in the step S3, the temperature of the die in the press molding is 165 ℃; and (3) the molding pressure of the compression molding in the step (S3) is 25MPa, and the temperature is kept for 3 hours at 230 ℃ after the compression molding.
The heat treatment in the step S4 is performed in a high-pressure sintering furnace, the heat treatment temperature is 2100 ℃, and the heat treatment time is 4 hours.
Comparative example 1
The present invention provides a heat resistant high strength fastener material similar to example 1 except that no niobium silicide and no ionic liquid were added.
Comparative example 2
The present invention provides a heat resistant high strength fastener material similar to example 1 except that no nano zirconium carbide was added and a phenolic resin (trade name: PF-5206, manufactured by Santa Claus Co., ltd.) was used instead of the soluble rosin-based polyimide.
In order to further illustrate the beneficial technical effects of the heat-resistant high-strength fastener materials prepared by the embodiments of the invention, the heat-resistant high-strength fastener materials prepared by the embodiments are subjected to related performance tests, the test results are shown in table 1, and the test method is as follows:
(1) Flexural strength: three point flexural strength was tested with reference to ASTM C1341-13;
(2) Fracture toughness: fracture toughness is tested with reference to ASTM C1421-10;
(3) Thermal shock resistance: and (3) weighing the products, respectively placing the products in a high-temperature furnace at 1500 ℃ after the products are weighed in mass, preserving heat for 5min, taking out and cooling to room temperature, placing the products in the high-temperature furnace again, circulating for 30 times, weighing again, recording and calculating the weight loss rate of the samples, wherein the smaller the weight loss rate value is, the better the thermal shock resistance is.
As can be seen from Table 1, the heat-resistant high-strength fastener material disclosed in the examples of the present invention has more excellent mechanical properties and thermal shock resistance than the comparative example, and the addition of niobium silicide, ionic liquid, nano zirconium carbide, and soluble rosin-based polyimide is beneficial for improving the above properties.
Table 1 results of testing the properties of heat resistant high strength fastener materials
| Sample of | Flexural Strength (MPa) | Fracture toughness (MPa.m) 1/2 ) | Weight loss ratio (%) |
| Example 1 | ≥382 | ≥18.8 | ≤0.34 |
| Example 2 | ≥390 | ≥18.5 | ≤0.28 |
| Example 3 | ≥395 | ≥17.9 | ≤0.24 |
| Example 4 | ≥401 | ≥18.2 | ≤0.16 |
| Example 5 | ≥411 | ≥18.0 | ≤0.10 |
| Comparative example 1 | ≤348 | ≤16.7 | ≥0.63 |
| Comparative example 2 | ≤356 | ≤17.3 | ≥0.58 |
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The heat-resistant high-strength fastener material is characterized by comprising the following raw materials in parts by weight: 15-25 parts of silicon carbide fiber, 40-60 parts of carbon fiber, 5-8 parts of solid carbon nanofiber, 4-6 parts of nano silicon boride, 3-5 parts of nano zirconium carbide, 2-4 parts of niobium silicide, 8-10 parts of soluble rosin-based polyimide, 0.1-0.3 part of coupling agent and 0.5-0.8 part of ionic liquid; the ionic liquid is 1-allyl-3-vinyl imidazole chloride.
2. The heat resistant high strength fastener material of claim 1, wherein the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560, a silane coupling agent KH 570.
3. The heat resistant high strength fastener material of claim 1, wherein said niobium silicide has a particle size of 1-10 μm; the grain diameter of the nano zirconium carbide is 50nm; the particle size of the nano silicon boride is 60nm.
4. The heat resistant high strength fastener material according to claim 1, wherein said solid carbon nanofibers have an average diameter of 10nm to 200nm and an aspect ratio of (100 to 200): 1.
5. The heat resistant high strength fastener material of claim 1, wherein said silicon carbide fibers are silicon carbide fibers SCS-ULTRA; the carbon fiber is carbon fiber CT50-4.8/280.
6. A method of making a heat resistant high strength fastener material according to any one of claims 1-5, comprising the steps of:
step S1, mixing soluble rosin-based polyimide, a coupling agent and an ionic liquid to obtain a mixed material, adding the mixed material into an organic solvent, and uniformly stirring to obtain a mixed solution;
step S2, uniformly mixing silicon carbide fibers, carbon fibers, solid carbon nanofibers, nano silicon boride, nano zirconium carbide and niobium silicide according to parts by weight, adding the mixture into the mixed solution prepared in the step S1, and removing the solvent by rotary evaporation to obtain a blank;
s3, adding the blank manufactured in the step S2 into a die, and performing compression molding; the temperature of the die is 145-165 ℃ during the compression molding; the molding pressure of the compression molding is 15-25MPa, and the temperature is kept for 2-3 hours at 200-230 ℃ after the compression molding;
s4, performing heat treatment on the blank subjected to the compression molding in the step S3 to obtain a heat-resistant high-strength fastener material; the heat treatment is carried out in a high-pressure sintering furnace, the heat treatment temperature is 1600-2100 ℃, and the heat treatment time is 2-4h.
7. The method for producing a heat-resistant high-strength fastener material according to claim 6, wherein the mass ratio of the mixture and the organic solvent in step S1 is 1 (1-2); the organic solvent is at least one of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone.
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