Friction plate matched with aluminum ceramic plate, preparation method and application

Abstract

The invention relates to the technical field of brake systems, in particular to a friction plate matched with an aluminum ceramic disc, a preparation method and application. The friction plate is manufactured by the method. The method comprises the following steps: preparing a mixing system; the mixing system comprises phenolic resin, reinforced fibers and a filling material; carrying out pre-pressing treatment on the mixed material system to obtain a first green body; carrying out hot pressing treatment on the first green body to obtain a second green body; carrying out curing treatment on the second green body to obtain a friction plate prefabricated product; and machining the friction plate prefabricated product to obtain a friction plate finished product. The application refers to the application of the friction plate in forming a friction pair with an aluminum ceramic disc. The friction plate matched with the aluminum ceramic plate can be prepared, and the problems of scratches, braking noise and eccentric wear of the aluminum ceramic plate due to the fact that the friction plate is not matched with the aluminum ceramic plate are solved.

Description

Technical Field

[0001] This invention relates to the field of braking system technology, and in particular to a friction pad adapted to an aluminum ceramic disc, its preparation method, and its application. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the demand for lightweight vehicles is becoming increasingly urgent. In brake discs, compared to traditional cast iron discs, aluminum-ceramic discs reduce weight by 50%, demonstrating a significant advantage in lightweight design. In application, the brake disc needs to form a friction pair with the friction pads. While friction pads compatible with traditional cast iron discs are well-established, they are not suitable for aluminum-ceramic discs. Specifically, these friction pads contain embedded high-hardness particles, which can easily cause uneven friction on the aluminum-ceramic disc, resulting in scratches (such as furrows), affecting the disc's appearance and making it unacceptable to customers. This can also lead to braking noise and uneven wear. Therefore, eliminating scratches on the aluminum-ceramic disc surface, reducing braking noise, and eliminating uneven wear, while meeting braking performance requirements, has become a necessary requirement for vehicle manufacturers.

[0003] Therefore, it is necessary to provide a friction pad, preparation method, and application adapted to aluminum ceramic discs to solve the problems of existing friction pads adapted to traditional cast iron discs being incompatible with aluminum ceramic discs, resulting in scratches, braking noise, and uneven wear on the aluminum ceramic discs. Summary of the Invention

[0004] The purpose of this invention is to provide a friction pad adapted to aluminum-ceramic brake discs, its preparation method, and its application. The specific technical solution is as follows: In a first aspect, the present invention provides a method for preparing a friction pad adapted to an aluminum ceramic disc, comprising: Step S1: Prepare the mixing system; the mixing system includes the following raw material components by mass percentage: 10%~20% phenolic resin, 12%~16% reinforcing fiber, and the balance filler material; after combining and mixing the raw material components, the mixing system is obtained. The reinforcing fiber includes metal fibers; the metal fibers include copper fibers and steel fibers. The filling material includes a grinding-enhancing filler; the particle size of the grinding-enhancing filler is 1000~2000 mesh; Step S2: The mixing system is pre-compressed to obtain the first preform; Step S3: The first blank is hot-pressed to obtain the second blank; Step S4: After curing the second blank, a friction pad preform is obtained; Step S5: The friction plate preform is machined to obtain the finished friction plate.

[0005] Optionally, the grinding-enhancing filler includes at least one of Fe3O4, SiO2, SiC, and ZrO2; the Fe3O4 accounts for 2% to 6% of the mass percentage of the mixture system; the SiO2 accounts for 2% to 6% of the mass percentage of the mixture system; the SiC accounts for 5% to 8% of the mass percentage of the mixture system; and the ZrO2 accounts for 6% to 10% of the mass percentage of the mixture system.

[0006] Optionally, the filler material further includes organic fillers; the organic fillers include rubber; and the rubber accounts for 3% to 5% of the mass percentage of the mixture system.

[0007] Optionally, the filler material further includes additional fillers; the additional fillers include at least one selected from barite, potassium titanate, zirconium silicate, dolomite, zinc oxide, chromite powder, and titanium dioxide; the barite accounts for 10% to 15% of the mass percentage of the mixture system; the potassium titanate accounts for 10% to 15% of the mass percentage of the mixture system; the zirconium silicate accounts for 1% to 3% of the mass percentage of the mixture system; the dolomite accounts for 2% to 6% of the mass percentage of the mixture system; the zinc oxide accounts for 1% to 3% of the mass percentage of the mixture system; the chromite powder accounts for 1% to 3% of the mass percentage of the mixture system; and the titanium dioxide accounts for 2% to 5% of the mass percentage of the mixture system.

[0008] Optionally, the filler material further includes a lubricating filler; the lubricating filler includes flake graphite; the flake graphite accounts for 2% to 8% of the mass percentage of the mixture system.

[0009] Optionally, the copper fiber accounts for 1% to 2% of the mass of the mixture system; the steel fiber accounts for 3% to 6% of the mass of the mixture system.

[0010] Optionally, the reinforcing fiber further includes non-metallic fibers; the non-metallic fibers include aramid fibers, Al2O3 ceramic fibers and wollastonite; the aramid fibers account for 1% to 3% of the mass percentage of the mixture system; the Al2O3 ceramic fibers account for 2% to 6% of the mass percentage of the mixture system; and the wollastonite accounts for 1% to 3% of the mass percentage of the mixture system.

[0011] Optionally, the phenolic resin includes aralkyl-modified phenolic resin; The pre-compression process uses a pre-compression pressure of 0.5~3MPa and a pre-compression time of 5~10s; The hot pressing process uses a hot pressing temperature of 160~210℃, a hot pressing pressure of 25~35MPa, and a hot pressing time of 10~20min. At the beginning of the hot pressing, the gas is released once every 5~10s, and the gas release is repeated 3~5 times. After holding the pressure for 8~20min, the gas is released once every 3~5min, and the gas release is repeated 3~5 times.

[0012] The curing process is a multi-stage curing process. First, the temperature is raised to 160±10°C and held for 1 hour±5 minutes. Second, the temperature is raised to 180±10°C and held for 2 hours±5 minutes. Then, the temperature is raised to 200±10°C and held for 2 hours±5 minutes. Finally, the temperature is raised to 220±10°C and held for 1 hour±5 minutes.

[0013] In a second aspect, the present invention provides a friction pad adapted to an aluminum ceramic disc, which is prepared by the aforementioned method for preparing a friction pad adapted to an aluminum ceramic disc.

[0014] In a third aspect, the present invention provides an application of a friction plate adapted to an aluminum ceramic disc in forming a friction pair with the aluminum ceramic disc. The friction plate and the aluminum ceramic disc in the friction pair are tested according to the SAE J2522 standard. The nominal coefficient of friction of the friction plate is 0.38±10% and the high-temperature coefficient of friction is 0.25±10%. The surface condition of the aluminum ceramic disc is grade 7 or above. The friction pair formed by the friction plate and the aluminum ceramic disc meets the requirements for vehicle application.

[0015] The application of the technical solution of the present invention has at least the following beneficial effects: (1) The present invention provides a method for preparing a friction plate that is compatible with an aluminum ceramic disc, which can prepare a friction plate that is compatible with an aluminum ceramic disc, and avoid the problem of scratches, braking noise and uneven wear on the aluminum ceramic disc caused by the friction plate not being compatible with the aluminum ceramic disc. Specifically, this invention involves mixing phenolic resin, reinforcing fibers, and fillers in a compounding system, followed by pre-pressing, hot-pressing, and curing treatments. This synergistically enhances the wear resistance and increases the friction coefficient of the friction pad. The pre-pressing process, primarily a physical forming step, initially densifies the loose compound system, removing most air and obtaining a dimensionally stable first blank with sufficient handling strength. This prepares the pad for hot pressing, ensuring uniform heating and stress during the process. It also ensures that the phenolic resin fully impregnates all reinforcing fibers and fillers, and that the fibers and fillers are evenly distributed. This guarantees a stable friction coefficient during braking between the friction pad and the aluminum ceramic disc, and avoids uneven wear caused by uneven distribution of reinforcing fibers and fillers. During hot pressing, the phenolic resin undergoes a cross-linking and curing reaction, providing the friction pad with mechanical strength, thermal stability, and a structural framework. Under the high temperature and oxygen-rich environment of the hot pressing process, the metal fibers oxidize on the surface, forming metal oxides, which then react with the decomposition products of the phenolic resin in a solid state, improving the strength and toughness of the friction pad. The curing process further deepens the curing of phenolic resin, increases its crosslinking density and degree of curing, significantly improves its thermal stability at high temperatures, reduces thermal fade, and decreases gas emissions during braking. Furthermore, the use of steel fibers in the reinforcing fibers effectively improves the nominal coefficient of friction and wear resistance of the friction pad and the aluminum ceramic disc, enhances the thermal conductivity of the friction pad, and improves high-temperature performance. The copper fibers used in the reinforcing fibers possess good plasticity, forming a dense friction transfer layer on the surface of the aluminum ceramic disc paired with the friction pad. This protects the surface of the aluminum ceramic disc, preventing the accumulation of wear debris and the formation of hard particles that could scratch the disc during friction. It also prevents sharp braking noise caused by hard particles between the aluminum ceramic disc and the friction pad during friction. Using a grinding-enhancing filler with a particle size of 1000-2000 mesh in the filler material ensures that the filler has a suitable particle size. This facilitates thorough mixing of the grinding-enhancing filler with other raw material components, effectively improving the hardness of the resulting friction plate. This provides sufficient frictional force during the mating friction between the friction plate and the aluminum ceramic disc, and avoids uneven wear. Furthermore, to ensure that the friction plate and aluminum ceramic disc meet application requirements, the particle size of the grinding-enhancing filler must be effectively controlled. If the particle size of the grinding-enhancing filler is too fine, it will not only increase manufacturing costs but also easily lead to a low coefficient of friction for the friction plate. If the particle size of the grinding-enhancing filler is too coarse, it will easily cause uneven friction on the aluminum ceramic disc, resulting in scratches (such as furrows).

[0016] (2) In this invention, the amount of steel fiber is controlled at 3% to 6%. That is, controlling the appropriate amount of steel fiber can effectively improve the nominal friction coefficient and wear resistance of the friction plate and the aluminum ceramic disc, improve the thermal conductivity of the friction plate, and improve the high-temperature performance. If the amount of steel fiber is too high, the friction plate will easily accumulate hard particles during the friction process with the aluminum ceramic disc, which will scratch the surface of the aluminum ceramic disc; if the amount of steel fiber is too low, the friction coefficient and wear resistance of the friction plate will decrease.

[0017] (3) In this invention, the amount of copper fiber is controlled to be 1% to 2%. That is, the appropriate amount of copper fiber can form a dense friction transfer layer on the surface of the aluminum ceramic disc paired with the friction plate, avoiding wear on the aluminum ceramic disc to the point of scratches, and also avoiding braking noise. If the amount of copper fiber is too high, the friction plate will easily accumulate hard particles during the friction process with the aluminum ceramic disc, which will scratch the surface of the aluminum ceramic disc; if the amount of copper fiber is too low, a complete and dense friction transfer layer cannot be formed.

[0018] (4) In this invention, an appropriate amount of flake graphite is used in the lubricating filler, which can form a lubricating effect on the surface of the aluminum ceramic disc paired with the friction plate, thus avoiding scratching the surface of the aluminum ceramic disc.

[0019] (5) The additional filler used in this invention can synergistically improve the formation of a stable friction layer on the friction plate at high temperature and prevent damage to the surface of the paired aluminum ceramic disc.

[0020] (6) The non-metallic fibers used in this invention can synergistically improve the high temperature resistance of the friction plate and optimize the friction coefficient of the friction plate.

[0021] (7) The metal fibers and wear-enhancing particles used in the friction pads prepared in this invention have a synergistic effect, resulting in friction pads with both high strength and good impact resistance. Specifically, this invention uses at least one of Fe3O4, SiO2, SiC, and ZrO2 as a rigid phase in the wear-enhancing particles, which are embedded in the phenolic resin matrix and the metal fiber network to increase the contact stress when the friction pad is mated with the aluminum ceramic disc. Furthermore, this invention uses steel fibers and copper fibers as toughening phases in the metal fibers, which can effectively improve the tensile strength and ductility of the friction pad, and can effectively improve the shear stress borne by the friction pad and the aluminum ceramic disc during friction and wear. In other words, the combination of metal fibers and wear-enhancing particles can synergistically endow the friction pad with both high strength and good impact resistance.

[0022] (8) The present invention selects organic filler rubber in the filling material, which can be vulcanized during hot pressing and improves the impact resistance of the friction plate.

[0023] (9) The present invention adopts a multi-stage curing process, which facilitates the effective elimination of residual stress in the friction pad, improves its dimensional stability, and prevents cracking during use.

[0024] (10) When the friction plate prepared by the present invention is used in the friction pair formed with the aluminum ceramic disc, it can maintain a stable coefficient of friction, no noise during braking, and the aluminum ceramic disc surface is in good condition with no obvious scratches under different speeds, different temperatures and different load conditions.

[0025] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 The morphology of the aluminum ceramic plate tested in Comparative Example 1, taken from the obvious scratches and its outer periphery, is observed by scanning electron microscopy (SEM). Figure 1 The resolution scale in the upper right corner is 200 μm. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1: A method for preparing a friction pad adapted to an aluminum ceramic disc, comprising: Step S1: Prepare the mixing system; the mixing system includes the following raw material components by mass percentage: 10%~20% (specifically 15%) of phenolic resin, 12%~16% of reinforcing fiber, and the balance of filler material; after combining and mixing the raw material components, the mixing system is obtained. The reinforcing fiber includes metal fibers; the metal fibers include copper fibers and steel fibers. The filling material includes a grinding-enhancing filler; the particle size of the grinding-enhancing filler is 1000~2000 mesh; Step S2: The mixing system is pre-compressed to obtain the first preform; Step S3: The first blank is hot-pressed to obtain the second blank; Step S4: After curing the second blank, a friction pad preform is obtained; Step S5: The friction plate preform is machined to obtain the finished friction plate.

[0030] The grinding-enhancing filler is Fe3O4, SiO2, SiC, and ZrO2; the Fe3O4 accounts for 2% to 6% (specifically 6%) of the mass percentage of the mixture system; the SiO2 accounts for 2% to 6% (specifically 6%) of the mass percentage of the mixture system; the SiC accounts for 5% to 8% (specifically 8%) of the mass percentage of the mixture system; and the ZrO2 accounts for 6% to 10% (specifically 10%) of the mass percentage of the mixture system.

[0031] The filler material also includes an organic filler; the organic filler is rubber; the rubber accounts for 3% to 5% (specifically 5%) of the mass of the mixture system.

[0032] The filler material further includes additional fillers; the additional fillers are barite, potassium titanate, zirconium silicate, dolomite, zinc oxide, chromite powder, and titanium dioxide; the barite accounts for 10%~15% (specifically 13%) of the mass percentage of the mixture; the potassium titanate accounts for 10%~15% (specifically 12%) of the mass percentage of the mixture; the zirconium silicate accounts for 1%~3% (specifically 1%) of the mass percentage of the mixture; the dolomite accounts for 2%~6% (specifically 3%) of the mass percentage of the mixture; the zinc oxide accounts for 1%~3% (specifically 1%) of the mass percentage of the mixture; the chromite powder accounts for 1%~3% (specifically 1%) of the mass percentage of the mixture; and the titanium dioxide accounts for 2%~5% (specifically 2%) of the mass percentage of the mixture.

[0033] The filler material also includes a lubricating filler; the lubricating filler is flake graphite; the flake graphite accounts for 2% to 8% (specifically 4%) of the mass percentage of the mixture system.

[0034] The copper fiber accounts for 1% to 2% of the mass of the mixture (specifically 2%). The steel fiber accounts for 3% to 6% of the mass of the mixture (specifically 3%).

[0035] The reinforcing fiber also includes non-metallic fibers; the non-metallic fibers are aramid fibers, Al2O3 ceramic fibers and wollastonite; the aramid fibers account for 1% to 3% (specifically 2%) of the mass percentage of the mixture system; the Al2O3 ceramic fibers account for 2% to 6% (specifically 4%) of the mass percentage of the mixture system; the wollastonite accounts for 1% to 3% (specifically 2%) of the mass percentage of the mixture system.

[0036] The phenolic resin is a commercially available aralkyl-modified phenolic resin, a white powder with a particle size of 200 mesh and a particle size of ≥99.5%. The manufacturer is Jiangmen Kunyi Resin Materials Technology Co., Ltd.

[0037] The pre-compression process uses a pre-compression pressure of 0.5~3MPa (specifically 2MPa) and a pre-compression time of 5~10s (specifically 10s). The hot pressing process uses a temperature of 160~210℃ (specifically 180℃), a pressure of 25~35MPa (specifically 25MPa), and a time of 10~20min (specifically 10min). At the beginning of the hot pressing, the gas is released every 5~10s (specifically 10s), and this process is repeated 3~5 times (specifically 5 times). After holding the pressure for 9min, the gas is released every 3 minutes, and this process is repeated 3 times. The curing process is a multi-stage process. First, the temperature is raised to 160°C and held for 1 hour. Second, the temperature is raised to 180°C and held for 2 hours. Third, the temperature is raised to 200°C and held for 2 hours. Finally, the temperature is raised to 220°C and held for 1 hour. After the curing process, the friction pad preform is allowed to cool naturally to room temperature.

[0038] Comparative Example 1: Unlike Example 1, the particle size of the grinding-enhancing filler is 325~1000 mesh; The amount of metal fiber used is excessive. Specifically, the mass percentage of copper fiber in the mixture system is increased to 5%, and the mass percentage of steel fiber in the mixture system is increased to 8%. The amount of grinding-enhancing filler is too low. Specifically, the mass percentage of Fe3O4 in the mixture system is reduced to 4%; the mass percentage of SiO2 in the mixture system is reduced to 4%; the mass percentage of SiC in the mixture system is reduced to 6%; and the mass percentage of ZrO2 in the mixture system is reduced to 8%.

[0039] Comparative Example 2: Unlike Example 1, the particle size of the grinding-enhancing filler is 325~1000 mesh.

[0040] Comparative Example 3: Unlike Example 1, the amount of metal fiber used is zero, while the amount of phenolic resin is increased to 20%. Comparative Example 4: Unlike Example 1, the particle size of the grinding-enhancing filler is 325~1000 mesh.

[0041] The amount of metal fiber used is zero, and the amount of phenolic resin used is increased to 20%.

[0042] The friction pads prepared in Examples 1 and Comparative Examples 1-4 were respectively used to form friction pairs with existing aluminum ceramic discs for performance testing. The test results are shown in Table 1. The average coefficient of friction was tested according to SAE J2522 "Dynamometer Global Brake Effectiveness". Hardness was tested according to GB / T 5766 "Rockwell Hardness Test Method for Friction Materials", with the Rockwell hardness scale being R. The test was conducted according to the experimental procedures in Chapter 7, and the results were recorded. Shear strength was tested according to ISO 6312 "Road vehicles—Brake pads, disc brake pads and drum brake shoe assemblies—Shear strength test method". The test was conducted according to the test procedures in Chapter 7 at both room temperature (23.5℃±5℃) and high temperature (300℃±10℃), and the results were recorded. The existing aluminum ceramic disc is the D358×25 model aluminum ceramic brake disc manufactured by Hunan Xiangtou Light Materials Technology Co., Ltd.

[0043] Table 1 Test Results From the data in Table 1, we know that: Compared to Examples 1-4, the friction pair formed by the friction plate prepared in Example 1 and the aluminum ceramic disc in this invention not only exhibits a higher average coefficient of friction, good strength (characterized by hardness data) and toughness (characterized by shear strength data) after testing, but also ensures that there are no obvious scratches on the surface of the aluminum ceramic disc.

[0044] Comparing Example 1 and Comparative Example 1, it is known that reducing the amount of friction-enhancing filler, increasing the amount of steel and copper fibers, and increasing the particle size of the friction-enhancing filler, while resulting in friction plates with higher strength and toughness, leads to noticeable scratches on the surface of the aluminum ceramic disc. This is because excessive amounts of metal fibers can significantly improve the strength and toughness of the friction plate, and excessively coarse particle size of the friction-enhancing filler can easily cause uneven friction on the aluminum ceramic disc, resulting in scratches.

[0045] By comparing Example 1 and Comparative Example 2, it is known that increasing the particle size of the grinding-enhancing filler leads to uneven friction on the aluminum ceramic disc, resulting in scratches on the aluminum ceramic disc.

[0046] By comparing Example 1 and Comparative Example 3, it is known that reducing the amount of metal fiber to zero and increasing the amount of phenolic resin to 20%, although it prevents the resulting friction pad from causing obvious scratches on the aluminum ceramic disc surface, leads to a significant decrease in the average friction coefficient, strength, and toughness of the friction pad. This is because, on the one hand, the combination of metal fiber and wear-enhancing particles in Example 1 has a synergistic effect, resulting in a friction pad with both high strength and good toughness. Specifically, the wear-enhancing particles, as a rigid phase, are embedded in the phenolic resin matrix and the metal fiber network, increasing the contact stress when the friction pad mates with the aluminum ceramic disc. Furthermore, the use of steel fiber and copper fiber as toughening phases in the metal fiber effectively improves the tensile strength and ductility of the friction pad, and effectively increases the shear stress borne by the friction pad and the aluminum ceramic disc during friction and wear. In other words, the combination of metal fiber and wear-enhancing particles synergistically endows the friction pad with both high strength and good toughness. On the other hand, the use of an appropriate amount of steel fiber in Example 1 can increase the average friction coefficient of the friction pad. Furthermore, it should be noted that although the amount of phenolic resin in Comparative Example 3 was increased to 20%, as a basic curing material, it could not compensate for the decrease in the average coefficient of friction, strength, and toughness of the friction pad caused by reducing the amount of metal fiber to zero.

[0047] Comparing Comparative Examples 3 and 4, it is evident that increasing the particle size of the friction-enhancing filler causes the prepared friction pad to produce a small number of scratches on the surface of the aluminum ceramic disc. This is because increasing the particle size of the friction-enhancing filler leads to uneven friction on the aluminum ceramic disc, resulting in scratches.

[0048] Sampling electron microscopy was performed on samples taken from the aluminum ceramic disc after the test in Comparative Example 1 at the areas with obvious scratches and around its periphery. See [link to relevant documentation]. Figure 1 Location ① is the center of the scratch, and location ② is the undamaged area outside the scratch. The morphology of location ① shows that the surface transfer layer formed during the friction between the aluminum ceramic disc and the friction pad has been destroyed, and the surface is silver-gray, which is the metallic color of the aluminum matrix. Compared with location ②, elemental analysis shows that the copper content at the scratch location corresponding to location ① is significantly higher, indicating that metal accumulation has occurred at the scratch. This also shows that the excessive use of copper and steel fibers in Comparative Example 1 can easily cause the friction pad to accumulate hard particles during the friction process with the aluminum ceramic disc, thus scratching the surface of the aluminum ceramic disc and showing the metallic color of the aluminum matrix. From the appearance, this appears as a plow mark, affecting the appearance.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. All equivalent structural transformations made under the inventive concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the protection scope of the present invention.

Claims

1. A method for preparing a friction pad adapted to an aluminum ceramic disc, characterized in that, include: Step S1: Prepare the mixing system; the mixing system includes the following raw material components by mass percentage: 10%~20% phenolic resin, 12%~16% reinforcing fiber, and the balance filler material; after combining and mixing the raw material components, the mixing system is obtained. The reinforcing fiber includes metal fibers; the metal fibers include copper fibers and steel fibers. The filling material includes a grinding-enhancing filler; the particle size of the grinding-enhancing filler is 1000~2000 mesh; Step S2: The mixing system is pre-compressed to obtain the first preform; Step S3: The first blank is hot-pressed to obtain the second blank; Step S4: After curing the second blank, a friction pad preform is obtained; Step S5: The friction plate preform is machined to obtain the finished friction plate.

2. The method for preparing the friction pad adapted to the aluminum ceramic disc as described in claim 1, characterized in that, The grinding-enhancing filler includes at least one of Fe3O4, SiO2, SiC, and ZrO2; the Fe3O4 accounts for 2% to 6% of the mass percentage of the mixture system; the SiO2 accounts for 2% to 6% of the mass percentage of the mixture system; the SiC accounts for 5% to 8% of the mass percentage of the mixture system; and the ZrO2 accounts for 6% to 10% of the mass percentage of the mixture system.

3. The method for preparing the friction pad adapted to the aluminum ceramic disc as described in claim 1, characterized in that, The filler material further includes organic fillers; the organic fillers include rubber; the rubber accounts for 3% to 5% of the mass percentage of the mixture system.

4. The method for preparing the friction pad adapted to the aluminum ceramic disc as described in claim 1, characterized in that, The filler material further includes additional fillers; the additional fillers include at least one selected from barite, potassium titanate, zirconium silicate, dolomite, zinc oxide, chromite powder, and titanium dioxide; the barite accounts for 10% to 15% of the mass percentage of the mixture system; the potassium titanate accounts for 10% to 15% of the mass percentage of the mixture system; the zirconium silicate accounts for 1% to 3% of the mass percentage of the mixture system; the dolomite accounts for 2% to 6% of the mass percentage of the mixture system; the zinc oxide accounts for 1% to 3% of the mass percentage of the mixture system; the chromite powder accounts for 1% to 3% of the mass percentage of the mixture system; and the titanium dioxide accounts for 2% to 5% of the mass percentage of the mixture system.

5. The method for preparing the friction pad adapted to the aluminum ceramic disc as described in claim 1, characterized in that, The filler material further includes a lubricating filler; the lubricating filler includes flake graphite; the flake graphite accounts for 2% to 8% of the mass percentage of the mixture system.

6. The method for preparing the friction pad adapted to the aluminum ceramic disc as described in claim 1, characterized in that, The copper fiber accounts for 1% to 2% of the mass of the mixture system; the steel fiber accounts for 3% to 6% of the mass of the mixture system.

7. The method for preparing the friction pad adapted to the aluminum ceramic disc as described in claim 1, characterized in that, The reinforcing fiber also includes non-metallic fibers; the non-metallic fibers include aramid fibers, Al2O3 ceramic fibers and wollastonite; the aramid fibers account for 1% to 3% of the mass percentage of the mixture system; the Al2O3 ceramic fibers account for 2% to 6% of the mass percentage of the mixture system; and the wollastonite accounts for 1% to 3% of the mass percentage of the mixture system.

8. The method for preparing the friction pad adapted to the aluminum ceramic disc as described in claim 1, characterized in that, The phenolic resin includes aralkyl-modified phenolic resin; The pre-compression process uses a pre-compression pressure of 0.5~3MPa and a pre-compression time of 5~10s; The hot pressing process uses a hot pressing temperature of 160~210℃, a hot pressing pressure of 25~35MPa, and a hot pressing time of 10~20min. At the beginning of the hot pressing, the air is released once every 5~10s, and the air release is repeated 3~5 times. After holding the pressure for 8~20min, the air is released once every 3~5min, and the air release is repeated 3~5 times. The curing process is a multi-stage curing process. First, the temperature is raised to 160±10°C and held for 1 hour±5 minutes. Second, the temperature is raised to 180±10°C and held for 2 hours±5 minutes. Then, the temperature is raised to 200±10°C and held for 2 hours±5 minutes. Finally, the temperature is raised to 220±10°C and held for 1 hour±5 minutes.

9. A friction pad adapted to an aluminum ceramic disc, characterized in that, The friction pad adapted to the aluminum ceramic disc is prepared using the method described in claim 1.

10. The application of the friction plate adapted to the aluminum ceramic disc as described in claim 9 in forming a friction pair with the aluminum ceramic disc, characterized in that, The friction plate and aluminum ceramic disc in the friction pair were tested according to the SAE J2522 standard. The nominal coefficient of friction of the friction plate was 0.38±10% and the high-temperature coefficient of friction was 0.25±10%. The surface condition of the aluminum ceramic disc was grade 7 or above. The friction pair formed by the friction plate and the aluminum ceramic disc met the requirements for vehicle application.

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