CN111960839B - Preparation method of pantograph slide plate for high-speed train - Google Patents

Preparation method of pantograph slide plate for high-speed train Download PDF

Info

Publication number
CN111960839B
CN111960839B CN202010729739.1A CN202010729739A CN111960839B CN 111960839 B CN111960839 B CN 111960839B CN 202010729739 A CN202010729739 A CN 202010729739A CN 111960839 B CN111960839 B CN 111960839B
Authority
CN
China
Prior art keywords
carbon fiber
powder
resin
porous body
furnace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010729739.1A
Other languages
Chinese (zh)
Other versions
CN111960839A (en
Inventor
王培�
康克家
吴海宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan University of Technology
Original Assignee
Henan University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henan University of Technology filed Critical Henan University of Technology
Priority to CN202010729739.1A priority Critical patent/CN111960839B/en
Publication of CN111960839A publication Critical patent/CN111960839A/en
Application granted granted Critical
Publication of CN111960839B publication Critical patent/CN111960839B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like
    • C04B35/83—Carbon fibres in a carbon matrix
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B60L5/20—Details of contact bow
    • B60L5/205—Details of contact bow with carbon contact members
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063—Preparing or treating the raw materials individually or as batches
    • C04B38/0635—Compounding ingredients
    • C04B38/0645—Burnable, meltable, sublimable materials
    • C04B38/067—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
    • C04B41/5133—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal with a composition mainly composed of one or more of the refractory metals
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/88—Metals
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • C04B2235/425—Graphite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6562—Heating rate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Composite Materials (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

The invention relates to a preparation method of a novel pantograph pan for low-cost copper-impregnated carbon/carbon composite material, which is a preparation method of a high-conductivity high-strength self-lubricating material. The invention firstly designs the sizing agent with special components; then brushing the modified carbon fiber prepreg cloth on the carbon fiber prepreg cloth in a brushing way, and then preparing a C/C porous body by hot pressing; finally, dipping the copper alloy; obtaining the copper-impregnated-C/C composite material. The invention does not need vapor deposition densification; the obtained product has excellent performance, and especially has far better abrasion performance than the existing product.

Description

Preparation method of pantograph slide plate for high-speed train
Technical Field
The invention relates to a preparation method of a novel pantograph slide plate for a low-cost copper-impregnated carbon/carbon composite material, which is a preparation method of a high-conductivity high-strength self-lubricating material.
Background
By 2020, the high-speed railway in China exceeds 3 ten thousand kilometers and is continuously about high-speed and electrified, wherein the normal speed per hour of a high-speed railway set is 300 and 380km/h, a maglev train normally runs over 400km/h, and the highest speed of a CIT500 of the high-speed railway in a test can reach 605 km/h. In the high-speed running process of the electric train, electric power is obtained from a contact net through a pantograph slide plate, the pantograph slide plate/contact net system is a throat part of a train power supply system, and the friction and wear condition and stability of the pantograph slide plate/contact net system have important influence on the current collection condition and safe running of the train. At present, pantograph slide plates in service of high-speed electric locomotives are mainly made of carbon composite materials, and comprise carbon slide plates and metal-impregnated carbon slide plates. The carbon-based sliding plate material has excellent antifriction performance, but has insufficient wear resistance and toughness, is easy to have edge breakage and block falling, and causes high maintenance cost. With the acceleration of trains, the defects of the existing carbon pantograph slide plate material in the aspects of mechanical and wear-resisting properties are gradually shown, and the development of the high-toughness wear-resisting slide plate is very important for the construction of high-speed electrified railways in China.
Kubota and the like adopt a C/C porous body subjected to high-temperature heat treatment as a preform, and a copper-impregnated-C/C composite material is prepared after copper alloy is impregnated, wherein the bending strength is 255MPa, the resistivity is 0.9-2.5 mu omega m, the arcing energy is low in the high-speed (55.6m/s) current-carrying friction process, and the main wear form is abrasive wear. Japanese railway comprehensive technical research institute has been concerned with the development of C/C composite material sliding plates, and in recent years, the development of C/C composite material sliding plates has been improvedAnd the copper-impregnated-C/C composite material is taken as a next-generation novel pantograph slide plate. The combination and wettability of a copper/carbon interface of the copper-impregnated-C/C composite material are researched by Zhou, Wu and Liang in China, the improvement of the mechanical property of the composite material is concerned, and the impact strength can reach 2.90-5.94J/cm 2 The resistivity is 0.63-11.61 mu omega m. The copper-impregnated-C/C composite material is prepared and molded by carbon fiber needling weaving, pyrolytic carbon deposition and resin impregnation carbonization, has the characteristics of high obdurability, excellent conductivity, good wear resistance and difficult damage, and has a very good application prospect in the field of pantograph slide plates, but the wear resistance of the copper-impregnated-C/C composite material is insufficient; when the graphite powder is added in the resin impregnation process, the blockage is easily caused, and the porosity of the composite material is high; when the high-temperature graphitization process is used for improving the antifriction property, the mechanical property and the wear resistance of the composite material are greatly reduced. Meanwhile, the preparation process is complex, high in cost and high in requirement on preparation equipment, and industrial production is difficult to realize.
Disclosure of Invention
The invention aims to solve the problem of high cost of the existing copper-impregnated-C/C composite material, and provides a preparation method of the copper-impregnated-C/C composite material, which has the advantages of simple preparation process, low cost and excellent performance.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; the method comprises the following steps:
step one, brushing modified carbon fiber prepreg cloth
Uniformly mixing resin, asphalt-based short carbon fiber, graphite powder and asphalt coke powder to obtain a mixture; in the mixture, the resin content is 30-80 wt%, preferably 40-50 wt%, the pitch-based short carbon fiber content is 0.1-30 wt%, preferably 15-20 wt%, the graphite powder is 0.1-28 wt%, preferably 15-25 wt%, and the pitch coke is 0.1-20 wt%, preferably 10-15 wt%, and the mixture is put into alcohol and stirred uniformly to obtain slurry; then uniformly brushing the slurry on the surface of the carbon fiber prepreg cloth; then drying to obtain the carbon fiber prepreg cloth after being coated and modified;
step two, preparing the C/C porous body by hot pressing
Brushing the modified carbon fiber prepreg cloth obtained in the step one, and carrying out layer by layerSequentially superposing, pressing, curing and molding to obtain a primary blank; carbonizing the primary blank, then impregnating, curing and carbonizing and densifying by adopting furan resin, and regulating and controlling the porosity of the C/C porous body to be 15-50 vol% by controlling the times of impregnation/carbonization and densification; then transferring the sample into a graphitization furnace, heating to 2300-2800 ℃, preserving the heat for 1-2 hours, and adjusting the graphitization degree of the sample; obtaining a density of 0.8-1.5g/cm 3 A porous body of C/C;
step three, dipping the copper alloy to prepare the copper-dipped C/C composite material
The third step comprises at least one of the following two schemes;
the first scheme is as follows:
uniformly mixing copper powder and metal powder; obtaining mixed powder, embedding the C/C porous body into the mixed powder and placing the C/C porous body into a sintering furnace; introducing protective gas, heating until the mixed powder is in a liquid phase, and adding low pressure to complete infiltration; the atomic ratio of the metal powder in the alloy is 0-35%; the metal powder consists of at least one of Si, Cr, Ti, Mo and Zr, preferably one or 2 of Si, Cr, Ti, Mo and Zr; the low pressure is 1-5 MPa; then cooling along with the furnace to obtain a product;
the second scheme is as follows:
uniformly mixing copper powder and metal powder; obtaining mixed powder, and performing cold pressing on the mixed powder to obtain a cold pressed blank; pressing the cold-pressed blank on the C/C porous body, and transferring the C/C porous body into a sintering furnace; vacuumizing and heating until the cold-pressed blank generates a liquid phase; introducing protective gas until the pressure in the furnace is 1-5 MPa; preserving heat and pressure until infiltration is completed; and then cooling along with the furnace to obtain the product.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; in the first step, the resin is furan resin and/or phenolic resin.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; the length of the pitch-based short carbon fiber is 100 mu m-2 mm.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; the graphite powder is flake graphite powder with the size of 30-1000 meshes.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; the size of the asphalt coke powder is 30-1000 meshes.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; the carbon fiber prepreg was prepared by the following scheme: the cross-shaped carbon fiber (PAN-based) cloth or the unidirectional carbon fiber cloth is obtained by soaking in a second resin solution, wherein the second resin is selected from one of pure phenolic resin and modified phenolic resin, and the resin content of the prepreg cloth is 20-60 vol%.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; the alcohol in step one is preferably ethanol.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; in the second step, the first step is carried out,
the press forming process comprises the following steps: the whole pressing process is completed on a flat vulcanizing machine. Firstly, applying pressure of 5-20MPa, raising the temperature to 110 ℃ at the speed of 80 ℃/h, and keeping the pressure for 45 min; then pressurizing to 10-65MPa, raising the temperature to 180 ℃ and 200 ℃ at the speed of 50 ℃/h, and maintaining the pressure for 3h until the resin is completely cured.
Resin impregnation process: putting the sample into an impregnation furnace, firstly vacuumizing and heating to 12 ℃, then pressurizing to 1.4-1.6MPa, and keeping for 2-3h to enable the furan resin to fill the composite material. Then heating to 120 ℃ at the heating rate of 12 ℃/h, heating to 190 ℃ at the heating rate of 9 ℃/h, and preserving heat for 2h at 190 ℃ to solidify the composite material.
The carbonization and temperature rise process comprises the following steps: transferring the sample into a carbonization furnace, and introducing inert protective gas; the room temperature is between 200 ℃ and 70 ℃/h to 90 ℃/h; 200 and 650 ℃, the heating rate is 10-15 ℃/h; the temperature rise rate is 10-20 ℃/h at 650-850 ℃, and the heat preservation is 1-3h at 845-855 ℃; the carbonized blank is repeatedly dipped, solidified, carbonized and carbonized until the density of the C/C porous body is between 0.8 and 1.5g/cm 3 。
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; and the product with excellent performance is obtained under the condition of not needing vapor deposition densification.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; after optimization, the impact strength of the obtained product is 2.7 to 3.3j/cm 2 The resistivity is 4.1 to 11.3 mu omega.m; at 50A,The friction coefficient of the product is 0.22-0.25 under the conditions of the speed of 100km/h and the load of 90N; the wear rate is 4.7-6.9mm/10000 km.
The invention relates to a preparation method of a pantograph slide plate for a high-speed train; after further optimization, the impact strength of the obtained product is 3.3j/cm 2 The resistivity was 4.13. mu. omega. m; under the conditions of 50A, speed of 100km/h and load of 90N, the friction coefficient of the product is 0.24; the wear rate was 4.71mm/10000 km.
Advantages and positive effects of the invention
Compared with the prior art, the invention has the advantages and positive effects that:
(1) the brush coating method is adopted to add the short pitch-based carbon fiber, pitch coke, graphite and other friction reducing and enhancing components, so that the blockage influence of the addition of graphite powder on the resin impregnation process is avoided, and the compactness of the composite material is improved; the carbon tissue structure of the copper-impregnated-C/C composite material is well regulated and controlled by combining a graphitization process, the antifriction performance of the composite material is improved while the wear resistance and the mechanical property of the composite material are not sacrificed, and the comprehensive performance of the composite material can be effectively improved.
(2) The carbon fiber content of the copper-impregnated-C/C composite material is well regulated and controlled by a die-free hot pressing method, the cost of the composite material can be further reduced by regulating and controlling the carbon fiber content, and the sliding plate material with reasonable cost and excellent mechanical property is further prepared.
(3) The C/C porous body is prepared by a mould-free hot pressing method, the copper-impregnated-C/C composite material is prepared by an embedding method, a large-size sample piece can be prepared, the preparation process is simple and easy to control, and the requirement on a preparation instrument is low;
(4) the cost for preparing the copper-impregnated-C/C composite material by the brush coating method is low, and the industrialization is easy to realize;
(5) the copper-impregnated-C/C composite material has the mechanical property and the wear resistance of carbon fibers, the conductive performance of copper alloy and the antifriction performance of graphite powder, pitch coke and pitch-based carbon fibers, and is a novel pantograph slide plate material with excellent comprehensive performance.
Drawings
FIG. 1 is a process flow diagram designed by the present invention;
FIG. 2 is a graph showing the macroscopic and microscopic structures of the C/C porous body prepared by the hot press method in example 1;
FIG. 3 is a macroscopic image and microstructure characterization chart of the copper-impregnated-C/C composite material obtained in example 1;
FIG. 4 is a graph representing the samples obtained in example 1 after a current-carrying frictional wear test of the copper-impregnated-C/C composite material.
The basic flow of the process designed by the present invention can be seen in fig. 1.
In FIG. 2, (a) is a photomicrograph of a C/C porous body prepared by a pressing method; (b) preparing a metallographic structure diagram of the C/C porous body by a pressing method; it can be seen from fig. 2 that the carbon fiber layers are well bonded without significant cracking and crazing.
In FIG. 3, (a) is a photomicrograph of the copper-impregnated-C/C composite; (b) is an SEM image of the copper-impregnated-C/C composite material; as can be seen from fig. 3, the composite material has a dense tissue structure, no obvious defects such as air attack, cracks and the like, and the copper alloy has good interface bonding with the carbon matrix and the carbon fibers.
It can be seen from fig. 4 that the friction surface is smooth and a continuous friction layer has been formed.
Detailed Description
Example one
Cross carbon fiber prepreg carbon cloth with the phenolic resin content of 40 vol% is adopted. The coating is mixed slurry of asphalt-based short carbon fiber, graphite powder, asphalt coke powder and phenolic resin, wherein the resin content is 60 wt%, the asphalt-based short carbon fiber content is 15 wt%, the graphite powder content is 20 wt%, and the mass ratio of the asphalt coke is 5 wt%, and the coating is mechanically stirred until the asphalt-based short carbon fiber, the graphite powder and the phenolic resin are uniformly dispersed; wherein the length of the pitch-based short carbon fiber is 500 mu m, the graphite powder is crystalline flake graphite powder with the size of 100 meshes, and the size of the pitch coke powder is 500 meshes. And (3) uniformly brushing the mixed slurry on the surface of the prepreg cloth twice by adopting a brushing method, and heating to 80 ℃ until the ethanol is completely volatilized.
Brushing the asphalt-based carbon fibers and then alternately layering; then placing the mixture in a flat vulcanizing machine for curing molding under the pressure of 40MPa, wherein the pressing temperature is 180 ℃, and maintaining the pressure for 3 hours; putting the mixture into a carbonization furnace for carbonization treatment, then transferring the carbonized mixture into an impregnation furnace for impregnation of furan resin, and circulating for two times; graphitizing at 2300 deg.C to obtain C/C porous body (shown in FIG. 2).
Uniformly mixing copper powder and 5% of Ti powder to obtain mixed powder, embedding the C/C porous body into the mixed powder and placing the C/C porous body into a sintering furnace; introducing argon as protective gas, heating until the mixed powder appears liquid phase, adding 5MPa pressure to complete infiltration, and then cooling along with the furnace to prepare the copper-impregnated-C/C composite material (as shown in figure 3).
The copper impregnated-C/C composite material had a carbon fiber content of about 32.5 vol% and a copper alloy content of 10.4 vol%. The bending strength and the impact strength of the composite material are respectively 160.7MPa and 2.7j/cm 2 The resistivity was 11.3. mu. omega. m. Under the conditions of 50A, speed of 100km/h and load of 90N, the friction sample is shown in figure 4, the friction coefficient of the composite material is 0.22, the wear rate is 6.3mm/10000km, and each index meets the requirements of the sliding plate for the modern electric locomotive.
Example two
Cross carbon fiber prepreg carbon cloth with the phenolic resin content of 30 vol% is adopted. The coating is mixed slurry of asphalt-based short carbon fiber, graphite powder, asphalt coke powder and phenolic resin, wherein the resin content is 55 wt%, the asphalt-based short carbon fiber content is 15 wt%, the graphite powder content is 25 wt%, and the mass ratio of the asphalt coke is 5 wt%, and the coating is mechanically stirred until the coating is uniformly dispersed; wherein the length of the pitch-based short carbon fiber is 500 μm, the graphite powder is flake graphite powder with the size of 100 meshes, and the size of the pitch coke powder is 500 meshes. And (3) uniformly brushing the mixed slurry on the surface of the prepreg cloth twice by adopting a brushing method, and heating to 80 ℃ until the ethanol is completely volatilized.
Brushing pitch-based carbon fibers and then alternately layering; then placing the mixture in a flat vulcanizing machine for curing and forming under the pressure of 40MPa, wherein the pressing temperature is 180 ℃, and the pressure is maintained for 3 hours; putting the mixture into a carbonization furnace for carbonization treatment, then transferring the carbonized mixture into an impregnation furnace for impregnation of furan resin, and circulating for two times; graphitizing at 2400 ℃ to obtain the C/C porous body.
Uniformly mixing copper powder and 10% of Ti metal powder to obtain mixed powder, and performing cold pressing on the mixed powder to obtain a cold pressed blank; pressing the cold-pressed blank on the C/C porous body, and transferring the C/C porous body into a sintering furnace; vacuumizing and heating until the cold-pressed blank has a liquid phase; introducing protective gas until the pressure in the furnace is 4 MPa; preserving heat and pressure until infiltration is completed; and then cooling along with the furnace to obtain a product, namely the prepared copper-impregnated-C/C composite material.
The carbon fiber content of the copper-impregnated-C/C composite material is about 39.3 vol%, and the copper alloy content is 18.4 vol%. The bending strength and the impact strength of the composite material are 192.7MPa and 3.3j/cm respectively 2 The resistivity was 4.13. mu. omega. m. Under the conditions of 50A, 100km/h and 90N load, the friction coefficient of the composite material is 0.24, the wear rate is 4.71mm/10000km, and each index meets the requirements of the sliding plate for the modern electric locomotive.
EXAMPLE III
The carbon cloth is presoaked by adopting unidirectional carbon fiber with the phenolic resin content of 45 vol%. The coating is mixed slurry of asphalt-based short carbon fiber, graphite powder, asphalt coke powder and phenolic resin, wherein the resin content is 70 wt%, the asphalt-based short carbon fiber content is 10 wt%, the graphite powder content is 15 wt%, and the mass ratio of the asphalt coke is 5 wt%, and the coating is mechanically stirred until the coating is uniformly dispersed; wherein the length of the pitch-based short carbon fiber is 800 mu m, the graphite powder is crystalline flake graphite powder with the size of 100 meshes, and the size of the pitch coke powder is 500 meshes. And (3) uniformly brushing the mixed slurry on the surface of the prepreg cloth twice by adopting a brushing method, and heating to 80 ℃ until the ethanol is completely volatilized.
Adopting unidirectional carbon fiber prepreg carbon cloth with pure phenolic resin content, brushing pitch-based carbon fiber, and vertically and alternately layering; then placing the mixture in a flat vulcanizing machine for curing molding under the pressure of 30MPa, wherein the pressing temperature is 185 ℃, and the pressure is maintained for 3 hours; putting the mixture into a carbonization furnace for carbonization treatment, then transferring the carbonized mixture into an impregnation furnace for impregnation of furan resin, and circulating for two times; the graphitization treatment was carried out at 2500 ℃. Uniformly mixing copper powder and Ti powder with the proportion of 7.5% to obtain mixed powder, embedding the C/C porous body into the mixed powder and placing the C/C porous body into a sintering furnace; introducing argon as protective gas, heating until the mixed powder appears liquid phase, adding 5MPa pressure to complete infiltration, and then cooling along with the furnace to prepare the copper-impregnated-C/C composite material.
The carbon fiber content of the copper impregnated-C/C composite material was about 25.3 vol%, and the copper content was 11.9 vol%. The bending strength and the impact strength of the composite material are respectively 130.7MPa and 2.2j/cm 2 Having a resistivity of12.4. mu. omega. m. Under the conditions of 50A, 100km/h and 90N load, the friction coefficient of the composite material is 0.26, the wear rate is 5.5mm/10000km, and all indexes meet the requirements of the sliding plate for the modern electric locomotive.
Example four
The carbon cloth is presoaked by adopting unidirectional carbon fiber with 50vol% of pure phenolic resin. The coating is mixed slurry of asphalt-based short carbon fiber, graphite powder, asphalt coke powder and phenolic resin, wherein the resin content is 65 wt%, the asphalt-based short carbon fiber content is 10 wt%, the graphite powder content is 20 wt%, and the mass ratio of the asphalt coke is 5 wt%), and the coating is mechanically stirred until the coating is uniformly dispersed; wherein the length of the pitch-based short carbon fiber is 500 mu m, the graphite powder is crystalline flake graphite powder with the size of 50 meshes, and the size of the pitch coke powder is 500 meshes. And (3) uniformly brushing the mixed slurry on the surface of the prepreg cloth twice by adopting a brushing method, and heating to 80 ℃ until the ethanol is completely volatilized.
And brushing the asphalt-based carbon fibers, and vertically and alternately layering. Then placing the mixture in a flat vulcanizing machine for curing and forming under the pressure of 25MPa, wherein the pressing temperature is 185 ℃, and the pressure is maintained for 3 hours; putting the mixture into a carbonization furnace for carbonization treatment, then transferring the carbonized mixture into an impregnation furnace for impregnation of furan resin, and circulating for three times; the graphitization treatment was carried out at 2500 ℃.
Uniformly mixing copper powder and 7.5% of Si metal powder to obtain mixed powder, and performing cold pressing on the mixed powder to obtain a cold pressed blank; pressing the cold-pressed blank on the C/C porous body, and transferring the C/C porous body into a sintering furnace; vacuumizing and heating until the cold-pressed blank generates a liquid phase; introducing protective gas until the pressure in the furnace is 4 MPa; preserving heat and pressure until infiltration is completed; and then cooling along with the furnace to obtain a product, namely the prepared copper-impregnated-C/C composite material.
The copper impregnated-C/C composite had a carbon fiber content of about 18.3 vol% and a copper content of 18.9 vol%. The bending strength and the impact strength of the composite material are respectively 116.9MPa and 1.627j/cm 2 The resistivity was 8.4. mu. omega. m. Under the conditions of 50A, 100km/h speed and 90N load, the friction coefficient of the composite material is 0.25, the wear rate is 6.9mm/10000km, and all indexes meet the requirements of the sliding plate for the modern electric locomotive.
Comparative example 1
Adopting unidirectional carbon fiber prepreg carbon cloth with 50vol% of pure phenolic resin to vertically and alternately lay layers. Then placing the mixture in a flat vulcanizing machine for curing and forming under the pressure of 20MPa, wherein the pressing temperature is 185 ℃, and the pressure is maintained for 3 hours; putting the mixture into a carbonization furnace for carbonization treatment, then transferring the carbonized mixture into an impregnation furnace for impregnation of furan resin, and circulating for three times; graphitization treatment is carried out at 2500 ℃.
Uniformly mixing copper powder and 7.5% of Si metal powder to obtain mixed powder, and performing cold pressing on the mixed powder to obtain a cold pressed blank; pressing the cold-pressed blank on the C/C porous body, and transferring the C/C porous body into a sintering furnace; vacuumizing and heating until the cold-pressed blank generates a liquid phase; introducing protective gas until the pressure in the furnace is 4 MPa; preserving heat and maintaining pressure until infiltration is completed; and then cooling along with the furnace to obtain a product, namely the prepared copper-impregnated-C/C composite material.
The carbon fiber content of the copper impregnated-C/C composite material was about 14.3 vol%, and the copper content was 22.9 vol%. The bending strength and the impact strength of the composite material are respectively 97.4MPa and 1.33j/cm 2 The resistivity was 6.9. mu. omega. m. Under the conditions of 50A, speed of 100km/h and load of 90N, the friction coefficient of the composite material is 0.28, and the wear rate is 13.5mm/10000 km.
Comparative example 2
Cross carbon fiber prepreg carbon cloth with the phenolic resin content of 40 vol% is adopted. The coating is mixed slurry of asphalt-based short carbon fiber, graphite powder, asphalt coke powder and phenolic resin, wherein the resin content is 40 wt%, the asphalt-based short carbon fiber content is 15 wt%, the graphite powder content is 35 wt%, and the mass ratio of the asphalt coke is 10 wt%, and the coating is mechanically stirred until the coating is uniformly dispersed; wherein the length of the pitch-based short carbon fiber is 500 μm, the graphite powder is flake graphite powder with the size of 30 meshes, and the size of the pitch coke powder is 500 meshes. And (3) uniformly brushing the mixed slurry on the surface of the prepreg cloth twice by adopting a brushing method, and heating to 80 ℃ until the ethanol is completely volatilized.
Brushing pitch-based carbon fibers and then alternately layering; then placing the mixture in a flat vulcanizing machine for curing molding under the pressure of 40MPa, wherein the pressing temperature is 180 ℃, and maintaining the pressure for 3 hours; putting the mixture into a carbonization furnace for carbonization treatment, then transferring the carbonized mixture into an impregnation furnace for impregnation of furan resin, and circulating for two times; graphitizing at 2400 ℃ to obtain the C/C porous body.
Uniformly mixing copper powder and 10% of Ti metal powder to obtain mixed powder, and performing cold pressing on the mixed powder to obtain a cold pressed blank; pressing the cold-pressed blank on the C/C porous body, and transferring the C/C porous body into a sintering furnace; vacuumizing and heating until the cold-pressed blank generates a liquid phase; introducing protective gas until the pressure in the furnace is 4 MPa; preserving heat and maintaining pressure until infiltration is completed; and then cooling along with the furnace to obtain a product, namely the prepared copper-impregnated-C/C composite material.
The carbon fiber content of the copper-impregnated-C/C composite material is about 28.3 vol%, and the copper alloy content is 13.9 vol%. The bending strength and the impact strength of the composite material are 115.7MPa and 1.9j/cm respectively 2 The resistivity was 13.13. mu. omega. m. Under the conditions of 50A, 100km/h speed and 90N load, the friction coefficient of the composite material is 0.22, the wear rate is 15.7mm/10000km, and all indexes meet the requirements of the sliding plate for the modern electric locomotive.

Claims (7)

1. A preparation method of a pantograph slide plate for a high-speed train; the method is characterized by comprising the following steps:
step one, brushing modified carbon fiber prepreg cloth
Uniformly mixing resin, asphalt-based short carbon fiber, graphite powder and asphalt coke powder to obtain a mixture; the above-mentioned
In the mixture, the resin content is 40-50%, the pitch-based short carbon fiber content is 15-20%, the graphite powder content is 15-25%, and the mass ratio of pitch coke is 10-15%, and the mixture is placed in alcohol and stirred uniformly to obtain slurry; then uniformly brushing the slurry on the surface of the carbon fiber prepreg cloth; then drying to obtain the carbon fiber prepreg cloth after being coated and modified; the length of the pitch-based short carbon fiber is 100 mu m-2 mm;
step two, preparing the C/C porous body by hot pressing
Coating the carbon fiber prepreg cloth after modification, and sequentially superposing, pressing, curing and molding the carbon fiber prepreg cloth layer by layer to obtain a primary blank; carbonizing the primary blank, then impregnating, curing and carbonizing and densifying by adopting furan resin, and regulating and controlling the porosity of the C/C porous body to be 15-50 vol% by controlling the times of impregnation/carbonization and densification; then transferring the sample into a graphitization furnace to heat up to 2300-2800 ℃, preserving the heat for 1-2 hours, and adjusting the sample graphiteDegree of formation; obtaining a density of 0.8-1.5g/cm 3 A porous body of C/C;
step three, dipping the copper alloy to prepare the copper-dipped C/C composite material
The third step comprises at least one of the following two schemes;
the first scheme is as follows:
uniformly mixing copper powder and metal powder; obtaining mixed powder, embedding the C/C porous body in the mixed powder and placing the C/C porous body in a sintering furnace; introducing protective gas, heating until the mixed powder is in a liquid phase, and adding low pressure to complete infiltration; the atomic ratio of the metal powder in the alloy is 0-35%; the metal powder is composed of at least one of Si, Cr, Ti, Mo and Zr; the low pressure is 1-5 MPa; then cooling along with the furnace to obtain a product;
the second scheme is as follows:
uniformly mixing copper powder and metal powder; obtaining mixed powder, and performing cold pressing on the mixed powder to obtain a cold pressed blank; pressing the cold-pressed blank on the C/C porous body, and transferring the C/C porous body into a sintering furnace; vacuumizing and heating until the cold-pressed blank has a liquid phase; introducing protective gas until the pressure in the furnace is 1-5 MPa; preserving heat and pressure until infiltration is completed; then cooling along with the furnace to obtain a product; the metal powder is composed of at least one of Si, Cr, Ti, Mo and Zr;
the impact strength of the obtained product is 2.7-3.3J/cm 2 And a resistivity of 4.1 to 11.3 [ mu ] omega · m; under the conditions of 50A, 100km/h and 90N load, the friction coefficient of the product is 0.22-0.25; the wear rate is 4.7-6.9mm/10000 km.
2. The method for manufacturing a pantograph slide plate for a high-speed train according to claim 1; the method is characterized in that: in the step one, the resin is furan resin and/or phenolic resin.
3. The method for manufacturing a pantograph slide plate for a high-speed train according to claim 1; the method is characterized in that: the graphite powder is flake graphite powder with the size of 30-1000 meshes.
4. The method for manufacturing a pantograph slide plate for a high-speed train according to claim 1; it is characterized in that
In the following steps: the size of the asphalt coke powder is 30-1000 meshes.
5. The method for manufacturing a pantograph slide plate for a high-speed train according to claim 1; the method is characterized in that: the carbon fiber prepreg was prepared by the following scheme: the PAN-based cross carbon fiber cloth or the unidirectional carbon fiber cloth is obtained by dipping in a second resin solution, wherein the second resin is one of pure phenolic resin and modified phenolic resin, and the resin content of the prepreg cloth is 20-60 vol%.
6. The method for manufacturing a pantograph slide plate for a high-speed train according to claim 1; the method is characterized in that: in the second step, the first step is carried out,
the press forming process comprises the following steps: the whole pressing process is finished on a flat vulcanizing machine; firstly, applying pressure of 5-20MPa, raising the temperature to 110 ℃ at the speed of 80 ℃/h, and keeping the pressure for 45 min; then pressurizing to 10-65MPa, heating to 180-200 ℃ at the speed of 50 ℃/h, and maintaining the pressure for 3h until the resin is completely cured;
resin impregnation process: putting a sample into an impregnation furnace, vacuumizing and heating to 12 ℃, pressurizing to 1.4-1.6MPa, keeping for 2-3h, filling furan resin into the composite material, heating to 120 ℃ at a heating rate of 12 ℃/h, heating to 190 ℃ at a heating rate of 9 ℃/h, and keeping the temperature for 2h at 190 ℃ to solidify the composite material;
the carbonization and temperature rise process comprises the following steps: transferring the sample into a carbonization furnace, and introducing inert protective gas; the room temperature is between 200 ℃ and 70 ℃/h to 90 ℃/h; 200 ℃ and 650 ℃, the heating rate is 10-15 ℃/h; the temperature rise rate is 10-20 ℃/h at 650-850 ℃, and the heat preservation is 1-3h at 845-855 ℃; the carbonized blank is repeatedly dipped, solidified, carbonized and carbonized until the density of the C/C porous body is between 0.8 and 1.5g/cm 3 。
7. The method for manufacturing a pantograph slide plate for a high-speed train according to claim 1; the method is characterized in that: the impact strength of the obtained product is 3.3J/cm 2 The resistivity is 4.13 mu omega.m; in thatThe friction coefficient of the product is 0.24 under the conditions of 50A, 100km/h and 90N load; the wear rate was 4.71mm/10000 km.
CN202010729739.1A 2020-07-27 2020-07-27 Preparation method of pantograph slide plate for high-speed train Active CN111960839B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010729739.1A CN111960839B (en) 2020-07-27 2020-07-27 Preparation method of pantograph slide plate for high-speed train

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010729739.1A CN111960839B (en) 2020-07-27 2020-07-27 Preparation method of pantograph slide plate for high-speed train

Publications (2)

Publication Number Publication Date
CN111960839A CN111960839A (en) 2020-11-20
CN111960839B true CN111960839B (en) 2022-07-26

Family

ID=73364051

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010729739.1A Active CN111960839B (en) 2020-07-27 2020-07-27 Preparation method of pantograph slide plate for high-speed train

Country Status (1)

Country Link
CN (1) CN111960839B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112979334B (en) * 2021-02-25 2022-12-02 攀枝花容则钒钛有限公司 Preparation method of carbon fiber reinforced pantograph carbon slide plate based on 3D printing
CN113183565B (en) * 2021-06-03 2023-02-07 河南工业大学 Preparation method of carbon fiber reinforced sliding current collecting material for high-speed train
CN113737170A (en) * 2021-09-08 2021-12-03 广东省科学院新材料研究所 Copper alloy pantograph and preparation method thereof
CN114438363A (en) * 2021-12-28 2022-05-06 安徽锦美碳材科技发展有限公司 Production method of directly-formed foam copper carbon matrix composite material electric boot

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2796895A1 (en) * 1999-07-30 2001-02-02 Lorraine Carbone CARBON / CARBON COMPOSITE PANTOGRAPH FROTTER IMPREGNATED WITH COPPER
US6183667B1 (en) * 1999-03-30 2001-02-06 Railway Technical Research Institute Titanium-and copper-containing carbon composite material and process for the production thereof
JP2010022143A (en) * 2008-07-11 2010-01-28 Railway Technical Res Inst Current collection material of pantograph contact strip
CN103410863A (en) * 2013-07-30 2013-11-27 广东工业大学 Half-bearing, material, device and method for steel backing/carbon fiber knitted fabric self-lubricating lining
CN105837240A (en) * 2016-05-21 2016-08-10 大同新成新材料股份有限公司 Method for preparing carbon-carbon composite material for pantograph
CN107161976A (en) * 2017-06-02 2017-09-15 中南大学 A kind of preparation method of pantograph pan copper/based composite material of carbon

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6183667B1 (en) * 1999-03-30 2001-02-06 Railway Technical Research Institute Titanium-and copper-containing carbon composite material and process for the production thereof
FR2796895A1 (en) * 1999-07-30 2001-02-02 Lorraine Carbone CARBON / CARBON COMPOSITE PANTOGRAPH FROTTER IMPREGNATED WITH COPPER
JP2010022143A (en) * 2008-07-11 2010-01-28 Railway Technical Res Inst Current collection material of pantograph contact strip
CN103410863A (en) * 2013-07-30 2013-11-27 广东工业大学 Half-bearing, material, device and method for steel backing/carbon fiber knitted fabric self-lubricating lining
CN105837240A (en) * 2016-05-21 2016-08-10 大同新成新材料股份有限公司 Method for preparing carbon-carbon composite material for pantograph
CN107161976A (en) * 2017-06-02 2017-09-15 中南大学 A kind of preparation method of pantograph pan copper/based composite material of carbon

Also Published As

Publication number Publication date
CN111960839A (en) 2020-11-20

Similar Documents

Publication Publication Date Title
CN111960839B (en) Preparation method of pantograph slide plate for high-speed train
WO2018188436A1 (en) Method for preparing c/c-sic composite material part and product thereof
CN109251052B (en) C/C composite material and preparation method thereof
CN106977217B (en) A kind of preparation method of high-strength and high-ductility silicon carbide fiber reinforced silicon carbide ceramic matric composite
CN107266075B (en) C/C-SiC composite material and preparation method and application thereof
CN108658613B (en) Method for preparing automobile brake disc by short fiber die pressing
EP1911990A2 (en) Carbon-carbon friction material with improved wear life
CN108046819B (en) C/C-SiC friction material with integrated structure and function and preparation method thereof
CN104926347B (en) High-speed railway EMUs pantograph slide composite material and preparation method thereof
CN111018537A (en) Method for preparing carbon fiber reinforced SiC ceramic matrix composite material through 3D printing
CN106478125B (en) A kind of preparation method of the modified C/C-SiC brake material of B4C
CN108610081B (en) Preparation method of C/C-Cu composite material
CN102515870A (en) Preparation method of C/SiC-ZrB2-ZrC ultrahigh-temperature ceramic-based composite material
CN110131343B (en) Preparation method of automobile brake disc
CN113045326B (en) Preparation method of modified carbon/carbon composite material
CN105541364B (en) A kind of method of step densification production carbon pottery automobile brake disc
US20040155382A1 (en) Manufacture of carbon/carbon composites by hot pressing
CN108083832B (en) Efficient low-cost near-net-shape preparation method of C/C-HfC composite material
CN114645449B (en) Preparation method of polyimide resin carbon modified C/C-SiC friction material
CN114621020A (en) Carbon-ceramic composite structure and preparation method thereof
CN105150857A (en) C/C-Cu composite material for pantograph pan and preparing method
CN113121253B (en) Ultrahigh-temperature C/SiHfBCN ceramic matrix composite material and preparation method thereof
CN113548902A (en) Preparation method of carbon fiber reinforced silicon carbide brake disc
CN116536597A (en) Three-dimensional network carbon phase reinforced copper-based composite material and preparation method thereof
CN112194497A (en) Method for preparing C/C composite material by low-temperature hot-pressing high-temperature pressureless two-step sintering

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant