CN119930316A - A brake material for carbon ceramic brake disc and its preparation method and application - Google Patents
A brake material for carbon ceramic brake disc and its preparation method and application Download PDFInfo
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- CN119930316A CN119930316A CN202510090513.4A CN202510090513A CN119930316A CN 119930316 A CN119930316 A CN 119930316A CN 202510090513 A CN202510090513 A CN 202510090513A CN 119930316 A CN119930316 A CN 119930316A
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Abstract
The invention discloses a braking material for a carbon ceramic braking disc, a preparation method and application thereof, wherein the braking material comprises 100-130 parts by mass of organic resin, 5-30 parts by mass of curing agent, 10-20 parts by mass of inorganic filler, 150-180 parts by mass of solvent and 6-8 parts by mass of dispersing agent. The brake material for the carbon ceramic brake disc is obtained by adopting specific component proportion in combination with hot press solidification, chemical vapor infiltration and graphitization treatment, so that the brake material has the characteristics of high strength, proper friction coefficient and low wear rate, and the wear resistance is improved.
Description
Technical Field
The application relates to the technical field of braking materials, in particular to a braking material for a carbon ceramic braking disc, and a preparation method and application thereof.
Background
The carbon ceramic brake disc is composed of high-strength carbon fiber as a reinforcement and pyrolytic carbon, silicon carbide (SiC) or the like as a matrix. Carbon fibers function to increase the mechanical strength of the material and provide the material with fracture toughness required in technical applications, while silicon carbide determines the hardness of the composite. The structure enables the carbon ceramic brake disc to have excellent physical properties and mechanical strength, and is commonly used in a brake system of aircrafts such as airplanes and the like to meet the brake requirements under extreme conditions such as high temperature, high pressure and the like, and the brake material is a precursor material for preparing the carbon ceramic brake disc, so that the existing wear resistance is low, and the requirements of the high-performance brake and aerospace structural member field on the material performance are difficult to meet. .
Disclosure of Invention
The invention aims to provide a braking material for a carbon ceramic brake disc, a preparation method and application thereof, and the braking material is enhanced in wear resistance by adopting specific raw material components and improving a preparation process, so that the problems of lower wear resistance and the like in the prior art are solved.
In order to solve the technical problems, the invention adopts the following scheme:
A method for preparing a brake material for a carbon ceramic brake disc, comprising the steps of:
Preparing ceramic slurry, namely obtaining the raw material components according to the mass ratio and uniformly mixing the raw material components to obtain the ceramic slurry;
Step two, preparing a prefabricated body, namely placing a plurality of monofilament carbon fibers into ceramic slurry for multiple times, dipping and winding to obtain weft-free cloth, and laying and sewing the weft-free cloth and a net tire laminate to obtain the prefabricated body;
And thirdly, performing hot press curing treatment, densification and graphitization treatment on the preform to obtain the braking material for the carbon ceramic braking disc.
According to the invention, the brake material for the carbon ceramic brake disc is obtained by adopting specific component proportions in combination with hot press curing, chemical vapor infiltration and graphitization treatment and simultaneously based on repeated dipping in ceramic slurry, so that the brake material has the characteristics of high strength, proper friction coefficient and low wear rate, and the wear resistance is improved.
Further, each raw material component comprises an organic resin, a curing agent, an inorganic filler, a solvent and a dispersing agent, wherein the mass ratio is 100-130:5-30:10-20:150-180:6-8;
further, the organic resin is one or two of phenolic resin and epoxy resin;
the curing agent is one or more than two of urotropine, m-phenylenediamine and polyamide;
The inorganic filler is one or more than two of flake graphite, silicon carbide powder and aluminum powder;
the solvent is one or more than two of ethanol, acetone and water;
the dispersing agent is sodium carboxymethyl cellulose.
Further, in the second step, the time of impregnation is 5-15 min, the temperature of impregnation is room temperature, and the pressure of impregnation is 0.3-0.5 MPa.
Further, the times of impregnation are 2-5 times.
Further, the sewing adopts Z-direction needling or wearing sewing.
Further, the temperature of the hot press curing treatment in the step three is 180-250 ℃, the pressure is 3-10 MPa, the time is 1.5-3 h, and then the carbon/carbon blank is obtained by sintering at 900-1200 ℃ for 1.5-3 h.
Further, the sintered carbon/carbon blank is densified to a density of 1.3-1.5 g/cm 3 by a chemical vapor infiltration method under the condition of 800-1000 ℃ and with a carbon source gas of propylene, liquefied petroleum gas or natural gas and a carrier gas of hydrogen, nitrogen or argon.
Further, the graphitization treatment is carried out for 1-3 hours under the vacuum condition of 2300-2700 ℃.
A braking material for a carbon ceramic braking disc is prepared by the preparation method of the braking material.
The application of the brake material in the field of braking or the field of aerospace structural parts.
The invention has the beneficial effects that the brake material for the carbon ceramic brake disc is finally obtained by adopting the specific component proportion, combining the hot press solidification, the chemical vapor infiltration method and the graphitization treatment and adopting the repeated dipping ceramic slurry, so that the brake material has the characteristics of high strength, proper friction coefficient and low wear rate, the wear resistance is improved, and the requirements of the high-performance brake and aerospace structural member field on the material performance are met.
Drawings
FIG. 1 is a schematic process flow diagram of a method for preparing a braking material according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
Example 1
This embodiment is a method for preparing a brake material for a carbon ceramic brake disc, referring to fig. 1, comprising the steps of:
(1) Preparing ceramic slurry, namely uniformly mixing organic resin, curing agent, inorganic filler, solvent and sodium carboxymethyl cellulose according to the mass ratio of 115:15:15:160:6 to prepare the ceramic slurry.
Wherein the organic resin is phenolic resin, the curing agent is urotropine, the inorganic filler is a mixture of crystalline flake graphite, silicon carbide powder and aluminum powder (the mass ratio is 1.2:1.5:1), and the solvent is ethanol and acetone (the mass ratio is 1:1).
(2) Preparing a preform, namely placing a plurality of monofilament carbon fibers into ceramic slurry for soaking for 15min, wherein the soaking temperature is room temperature, and the soaking pressure is 0.3MPa. And (3) dipping for 3 times, winding to obtain a weft-free cloth, and laying the weft-free cloth and the net tire in a lamination manner, and adopting Z-direction needling or opposite-wearing sewing to obtain a preform.
(3) And carrying out hot press curing treatment, densification treatment and graphitization treatment on the prefabricated body in sequence to obtain the braking material for the carbon ceramic braking disc.
The preparation method comprises the steps of hot-pressing and solidifying a prefabricated body for 1.5 hours at 200 ℃ and 7MPa, sintering for 1.5 hours at 1100 ℃ to obtain a carbon/carbon blank, wherein the density of the carbon/carbon blank is 1.25g/cm 3, densifying the carbon/carbon blank to 1.45g/cm 3 by a chemical vapor infiltration method under 900 ℃ with propylene as a carbon source gas and argon as a carrier gas, and graphitizing for 2 hours under 2600 ℃ vacuum condition to obtain the brake material for the carbon ceramic brake disc.
Example 2
The embodiment is a preparation method of a braking material for a carbon ceramic braking disc, comprising the following steps:
(1) Preparing ceramic slurry, namely uniformly mixing organic resin, curing agent, inorganic filler, solvent and sodium carboxymethyl cellulose according to the mass ratio of 110:20:15:150:8 to prepare the ceramic slurry.
Wherein the organic resin is phenolic resin and epoxy resin (the mass ratio is 1:1.3), the curing agent is urotropine and m-phenylenediamine (the mass ratio is 1:1.5), the inorganic filler is a mixture of crystalline flake graphite and silicon carbide powder aluminum powder (the mass ratio is 1.2:1.5:1), and the solvent is ethanol and acetone (the mass ratio is 1:1).
(2) Preparing a preform, namely placing a plurality of monofilament carbon fibers into ceramic slurry for soaking for 5min, wherein the soaking temperature is room temperature, and the soaking pressure is 0.4MPa. And (3) dipping for 5 times, winding to obtain a weft-free cloth, and laying the weft-free cloth and the net tire in a lamination manner, and performing Z-direction needling to obtain a preform.
(3) And carrying out hot press curing treatment, densification treatment and graphitization treatment on the prefabricated body in sequence to obtain the braking material for the carbon ceramic braking disc.
The preparation method comprises the steps of hot pressing and solidifying a prefabricated body for 2 hours at 180 ℃ and 5MPa, sintering for 3 hours at 1000 ℃ to obtain a carbon/carbon blank body, wherein the density of the carbon/carbon blank body is 1.30g/cm 3, densifying the carbon/carbon blank body to 1.5g/cm 3 by a chemical vapor infiltration method under the condition that the carbon source gas is liquefied petroleum gas and the carrier gas is nitrogen at 1000 ℃, and graphitizing for 1 hour at 2400 ℃ under the vacuum condition to obtain the brake material for the carbon ceramic brake disc.
Example 3
The embodiment is a preparation method of a braking material for a carbon ceramic braking disc, comprising the following steps:
(1) Preparing ceramic slurry, namely uniformly mixing organic resin, curing agent, inorganic filler, solvent and sodium carboxymethyl cellulose according to the mass ratio of 125:25:15:170:8 to prepare the ceramic slurry.
Wherein the organic resin is epoxy resin, the curing agent is a mixture of urotropine, m-phenylenediamine and polyamide (the mass ratio is 1:1.5:1.3), the inorganic filler is a mixture of aluminum powder and silicon carbide powder (the mass ratio is 1.2:1), and the solvent is water, ethanol and acetone (the mass ratio is 1:1:1).
(2) Preparing a preform, namely placing a plurality of monofilament carbon fibers into ceramic slurry for soaking for 10min, wherein the soaking temperature is room temperature, and the soaking pressure is 0.5MPa. And (3) dipping for 4 times, winding to obtain a weft-free cloth, and laying the weft-free cloth and the net tire in a lamination manner, and sewing in a penetrating manner to obtain a preform.
(3) And carrying out hot press curing treatment, densification treatment and graphitization treatment on the prefabricated body in sequence to obtain the braking material for the carbon ceramic braking disc.
The preparation method comprises the steps of carrying out hot pressing and solidification on a preform for 1.5h at 240 ℃ and 7MPa, then sintering for 3h at 1000 ℃ to obtain a carbon/carbon blank, wherein the density of the carbon/carbon blank is 1.43g/cm 3, carrying out densification on the carbon/carbon blank at 1000 ℃ by adopting a chemical vapor infiltration method until the density is 1.45g/cm 3 under the condition that the carbon source gas is propylene and the carrier gas is hydrogen, and then carrying out graphitization treatment for 3h under the condition that the temperature is 2400 ℃ to obtain the brake material for the carbon ceramic brake disc.
Example 3
The embodiment is a preparation method of a braking material for a carbon ceramic braking disc, comprising the following steps:
(1) Preparing ceramic slurry, namely uniformly mixing organic resin, curing agent, inorganic filler, solvent and sodium carboxymethyl cellulose according to the mass ratio of 130:25:20:170:8 to prepare the ceramic slurry.
Wherein the organic resin is epoxy resin, the curing agent is a mixture of urotropine, m-phenylenediamine and polyamide (the mass ratio is 1:1.5:1.3), the inorganic filler is a mixture of aluminum powder and silicon carbide powder (the mass ratio is 1.2:1), and the solvent is water and ethanol (the mass ratio is 1:1).
(2) Preparing a preform, namely placing a plurality of monofilament carbon fibers into ceramic slurry for soaking for 15min, wherein the soaking temperature is room temperature, and the soaking pressure is 0.5MPa. Dipping for 2 times, winding to obtain weft-free cloth, laying the weft-free cloth and the net tyre layer by layer, and adopting Z-direction needling to obtain the prefabricated body.
(3) And carrying out hot press curing treatment, densification treatment and graphitization treatment on the prefabricated body in sequence to obtain the braking material for the carbon ceramic braking disc.
The preparation method comprises the steps of hot pressing and solidifying a prefabricated body for 2 hours at 220 ℃ and 10MPa, sintering for 1.5 hours at 1200 ℃ to obtain a carbon/carbon blank body, wherein the density of the carbon/carbon blank body is 1.43g/cm 3, densifying the carbon/carbon blank body to 1.5g/cm 3 by adopting a chemical vapor infiltration method under the condition of 1200 ℃ with natural gas as carbon source gas and helium as carrier gas, and graphitizing for 3 hours under the condition of 2500 ℃ vacuum to obtain the braking material for the carbon ceramic braking disc.
Comparative example
This comparative example was consistent with the composition and method of example 2, except that the comparative example used a spray coating to spray the ceramic slurry onto the surface of the monofilament carbon fibers.
The braking materials prepared in example 2 and comparative example were subjected to mechanical properties and frictional wear tests, and the results are shown in table 1 below.
| Density (g/cm 3) | Flexural Strength/MPa | Coefficient of dynamic friction | Coefficient of wear/(μm/time) | |
| Example 2 | 1.5 | 297 | 0.32 | 0.39 |
| Comparative example | 1.46 | 239 | 0.42 | 0.53 |
As shown in Table 1, according to the test results of the material properties of the samples of the comparative examples and the comparative examples, the prefabricated body is prepared by adopting a mode of impregnating the monofilament carbon fibers for multiple times, so that the finally prepared brake material has the characteristics of high strength, proper friction coefficient and low wear rate, and the finished product of the carbon ceramic brake disc prepared later meets the requirement of high-performance braking.
The present invention is not limited to the preferred embodiments, and the present invention is described above in any way, but is not limited to the preferred embodiments, and any person skilled in the art will appreciate that the present invention is not limited to the embodiments described above, while the above disclosure may be used to make some changes or modifications to equivalent embodiments, any simple modification, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention will still fall within the scope of the technical solutions of the present invention.
Claims (10)
1. A method for preparing a brake material for a carbon ceramic brake disc, comprising the steps of:
Preparing ceramic slurry, namely obtaining the raw material components according to the mass ratio and uniformly mixing the raw material components to obtain the ceramic slurry;
Step two, preparing a prefabricated body, namely placing a plurality of monofilament carbon fibers into ceramic slurry for multiple times, dipping and winding to obtain weft-free cloth, and laying and sewing the weft-free cloth and a net tire laminate to obtain the prefabricated body;
And thirdly, performing hot press curing treatment, densification and graphitization treatment on the preform to obtain the braking material for the carbon ceramic braking disc.
2. The preparation method of the braking material for the carbon ceramic braking disc, which is characterized in that the raw material components comprise organic resin, curing agent, inorganic filler, solvent and dispersing agent, and the mass ratio is 100-130:5-30:10-20:150-180:6-8;
the organic resin is one or two of phenolic resin and epoxy resin;
the curing agent is one or more than two of urotropine, m-phenylenediamine and polyamide;
The inorganic filler is one or more than two of flake graphite, silicon carbide powder and aluminum powder;
the solvent is one or more than two of ethanol, acetone and water;
the dispersing agent is sodium carboxymethyl cellulose.
3. The method for preparing a brake material for a carbon ceramic brake disc according to claim 1, wherein in the second step, the time of impregnation is 5-15 min, the temperature of impregnation is room temperature, and the pressure of impregnation is 0.3-0.5 mpa.
4. The method for preparing a brake material for a carbon ceramic brake disc according to claim 1, wherein the number of times of impregnation is 2 to 5.
5. The method for producing a brake material for a carbon ceramic brake disk according to claim 1, wherein the sewing is performed by Z-direction needling or butt sewing.
6. The method for preparing the braking material for the carbon ceramic braking disc according to claim 1, wherein the temperature of the hot press curing treatment in the third step is 180-250 ℃, the pressure is 3-10 MPa, the time is 1.5-3 h, and the carbon/carbon embryo is obtained by sintering under the condition of 900-1200 ℃ for 1.5-3 h.
7. The method for preparing a brake material for a carbon ceramic brake disc according to claim 6, wherein the sintered carbon/carbon green body is densified to a density of 1.3-1.5 g/cm 3 by chemical vapor infiltration under the condition of 800-1000 ℃ by using propylene, liquefied petroleum gas or natural gas as a carbon source gas and hydrogen, nitrogen or argon as a carrier gas.
8. The method for preparing a brake material for a carbon ceramic brake disc according to claim 6, wherein the graphitization treatment is performed for 1 to 3 hours under a vacuum condition of 2300 to 2700 ℃.
9. A brake material for a carbon ceramic brake disc, characterized by being produced by the process for producing a brake material according to any one of claims 1 to 8.
10. Use of a brake material according to any one of claims 1 or 2 in the braking field or in the field of aerospace structural parts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510090513.4A CN119930316A (en) | 2025-01-21 | 2025-01-21 | A brake material for carbon ceramic brake disc and its preparation method and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510090513.4A CN119930316A (en) | 2025-01-21 | 2025-01-21 | A brake material for carbon ceramic brake disc and its preparation method and application |
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| CN202510090513.4A Pending CN119930316A (en) | 2025-01-21 | 2025-01-21 | A brake material for carbon ceramic brake disc and its preparation method and application |
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