A self-lubricating ceramic with an inlaid structure, its preparation method and application

Abstract

This invention discloses a self-lubricating ceramic with an inlaid structure, its preparation method, and its application, belonging to the field of high-performance structural ceramics and friction-reducing technology. The method includes the following steps: preparing a first slurry containing monomers, crosslinking agents, initiators, catalysts, and ceramic powder; casting the first slurry into a mold to obtain a first green body with textured grooves on its surface; preparing a second slurry containing monomers, crosslinking agents, initiators, catalysts, ceramic powder, and a lubricating phase; casting the first slurry into a mold to obtain the first green body with textured grooves on its surface; injecting the second slurry into the textured grooves of the first green body to form a self-lubricating inlay; and sintering to obtain the self-lubricating ceramic with the inlaid structure. The co-sintering method combines the two components into one, and the slip casting method ensures the internal density of the inlaid structure, maintaining the same mechanical strength as the ceramic matrix, preventing the inlaid structure from becoming a weak point in the ceramic component, and preventing the formation of a weak interface between the two components, further ensuring the mechanical properties of the final product.

Description

Technical Field

[0001] This invention belongs to the field of high-performance structural ceramics and friction reduction technology, specifically relating to a self-lubricating ceramic with an inlaid structure, its preparation method, and its application. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] Ceramic materials possess high hardness, high strength, excellent chemical stability, and biocompatibility, making them widely used in aerospace, precision manufacturing, and biomedical fields. However, ceramics typically exhibit a high coefficient of friction under dry friction conditions and are highly brittle. When used as structural components, they are prone to severe adhesive wear and surface micro-fracture, limiting their application in high-speed, high-load, and oil-free lubrication environments.

[0004] To improve the friction performance of ceramic components, solid lubricants are usually introduced into the ceramic matrix. The preparation methods often employ dry pressing or hot pressing sintering. However, dry mixing makes it difficult to ensure the uniform distribution of nano- or micro-scale lubricating phases in the ceramic matrix, which in turn makes it difficult to form a continuous lubricating film in actual working conditions, resulting in local fluctuations in the coefficient of friction and affecting the lubrication effect. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a self-lubricating ceramic with an embedded structure, its preparation method, and its application. Using a slurry containing ceramic powder as raw material, a textured ceramic green body is first prepared via gel casting. Then, a ceramic slurry containing a lubricating phase is filled into the texture to obtain a composite green body. A self-lubricating ceramic with an embedded structure is prepared by co-sintering. The lubricating phase is uniformly distributed within the embedded parts, stably overflowing during friction to maintain frictional performance. Furthermore, co-sintering improves the bonding strength between the two components, effectively enhancing molding accuracy.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: In a first aspect, a method for preparing a self-lubricating ceramic with an inlaid structure includes the following steps: A first slurry containing monomers, crosslinking agents, initiators, catalysts, and ceramic powders is prepared, and then cast into a mold to obtain a first green body with textured grooves on the surface; a second slurry containing monomers, crosslinking agents, initiators, catalysts, ceramic powders, and a lubricating phase is prepared. The first slurry is poured into a mold to obtain a first blank with textured grooves on the surface. The second slurry is injected into the textured grooves of the first blank to form a self-lubricating insert. A second blank is obtained in which the textured grooves of the first blank are filled with the self-lubricating insert. The second blank is sintered to obtain a self-lubricating ceramic with an insert structure.

[0007] Secondly, the self-lubricating ceramic with the above-mentioned method for preparing self-lubricating ceramic with the inlay structure is prepared into a self-lubricating ceramic with the inlay structure.

[0008] Self-lubricating ceramics include a ceramic matrix with multiple textured grooves on its surface. These grooves are filled with inlay structures that are tightly bonded to the ceramic matrix.

[0009] Thirdly, the applications of the aforementioned self-lubricating ceramics with inlay structures include their use in self-lubricating ceramic tracks, sliding bearings, and other ceramic sliding friction components or ceramic cutting tools.

[0010] The beneficial effects of this invention are as follows: This invention employs a slip casting method to prepare an inlay structure inside the first blank, and then uses a co-sintering method to combine the two into one. The slip casting method ensures that the interior of the inlay structure is dense, maintains the same mechanical strength as the ceramic matrix, and prevents the inlay structure from becoming a weak point in the mechanical structure of the ceramic component. The co-sintering method ensures that the inlay structure is tightly bonded to the ceramic matrix, prevents the appearance of a weak interface between the two, and further guarantees the mechanical properties of the final product. Attached Figure Description

[0011] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0012] Figure 1 This is a schematic diagram of the mold structure in Example 1.

[0013] Figure 2 This is a schematic diagram of the first blank structure in Example 1.

[0014] Figure 3 This is a schematic diagram of the second blank structure in Example 1.

[0015] Figure 4 This is a Vickers hardness diagram of the self-lubricating ceramic material with CaF2 content in Example 1.

[0016] Figure 5 This is a schematic diagram showing the bending strength of the self-lubricating ceramic material with CaF2 content in Example 1.

[0017] Figure 6This is a statistical result graph of the friction coefficient of the upper surface of the self-lubricating ceramic sample in Example 1.

[0018] Figure 7 This is a schematic diagram of the technical route for high-performance concrete resistant to high ground temperatures in Example 2.

[0019] Figure 8 This is a schematic diagram of the track greening structure in Example 2.

[0020] Figure 9 This is a schematic diagram of the self-lubricating ceramic track green body structure in Example 2.

[0021] Among them, 1. protruding structure; 2. mold cavity; 3. bottom surface of cavity; 4. textured groove; 5. upper surface; 6. self-lubricating insert; 7. track mold cavity; 8. textured groove forming part; 9. track textured groove; 10. track inlay structure. Detailed Implementation

[0022] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] One or more typical embodiments of the present invention provide a method for preparing a self-lubricating ceramic with an inlaid structure, comprising the steps of: A first slurry containing monomers, crosslinking agents, initiators, catalysts, and ceramic powders is prepared, and then cast into a mold to obtain a first green body with textured grooves on the surface; a second slurry containing monomers, crosslinking agents, initiators, catalysts, ceramic powders, and a lubricating phase is prepared. The first slurry is poured into a mold to obtain a first blank with textured grooves on the surface. The second slurry is injected into the textured grooves of the first blank to form a self-lubricating insert. A second blank is obtained in which the textured grooves of the first blank are filled with the self-lubricating insert. The second blank is sintered to obtain a self-lubricating ceramic with an insert structure.

[0025] In the above process, the slurry casting method ensures the internal density of the inlay structure. Through the similarity of the composition of the first slurry and the second slurry, the inlay structure formed by the second slurry maintains the same mechanical strength as the ceramic matrix formed by the first slurry, preventing the inlay structure from becoming a weak point in the mechanical structure of the ceramic component. The co-sintering method ensures the continuity of the crystal structure of the inlay structure and the ceramic matrix, achieving a tight bond between the two and preventing the appearance of a weak interface between them as a source of damage.

[0026] Optionally, the monomers include one or more of methacrylamide, acrylamide, and N-hydroxymethylacrylamide; the crosslinking agents include one or more of methylenebisacrylamide, polyethylene glycol diacrylate, and ethylene glycol dimethacrylate; the initiators include one or more of ammonium persulfate solution, ammonium bisulfate, and triethylenetetramine; and the catalysts include one or more of tetramethylethylenediamine solution, triethanolamine, and dimethylaniline, which cause the organic monomers in the slurry to crosslink and polymerize to form a three-dimensional network structure, thereby achieving in-situ curing and molding; the ceramic powders include one or more of alumina powder and zirconium oxide powder, with a particle size of 100 nm to 5 µm; all of the above components are common raw materials for the slip casting method of ceramics.

[0027] Optionally, the first slurry and the second slurry may further include a dispersant, a defoamer, and a pH adjuster, respectively. The dispersant includes one or more of polyacrylamide, polyethylene glycol, and tetramethylammonium hydroxide. The defoamer is selected from one or more of n-octanol, isooctanol, and ethylene glycol monobutyl ether to improve the density of the slurry after casting. The pH adjuster is selected from one or more of ammonia, sodium hydroxide, and hydrochloric acid to adjust the pH of the slurry to 7-12 to facilitate uniform dispersion of powder and to prepare a slurry with low viscosity and high solid content.

[0028] Optionally, the ceramic powder includes alumina powder and zirconia powder in a volume ratio of (3~5):1. The solid content of the ceramic powder in the first slurry is 50~60 vol; the solid content of the ceramic powder in the second slurry is 50~60 vol. For sintering compatibility, a lubricating phase is added to the ceramic powder formula of the first slurry to obtain the second slurry, that is, the volume ratio of alumina powder and zirconia powder in the second slurry is the same. And since the solid content will affect the sintering shrinkage rate, the solid content of the first slurry and the second slurry cannot differ too much. Specifically, the difference between the solid content of the first slurry and the solid content of the second slurry is less than 5 vol.

[0029] Optionally, the lubricating phase includes one or more of Ca2F, h-BN, and MoS2, with a particle size of 100 nm to 5 μm. In the second slurry, the lubricating phase accounts for 5 to 20 vol% of the sum of the ceramic powder and the lubricating phase. Since only the lubricating phase and ceramic powder in the second slurry become ceramic materials after sintering, the proportion of the lubricating phase in the embedded structure formed by sintering the second slurry is 5 to 20%. Too much lubricating phase will reduce the density of the sintered body and have an adverse effect on the mechanical properties, while too little will result in insufficient improvement in the lubrication performance of the material. An appropriate lubricating phase content should be selected for the embedded structure without affecting the properties of the matrix.

[0030] Optionally, the first slurry and the second slurry respectively include water, monomer, crosslinking agent, dispersant, initiator and catalyst in a mass ratio of 15:(1.5~2):(0.1~0.3):(1~2):(0.1~0.3):(0.1~0.3).

[0031] Optionally, before sintering, the second green body is dried to constant weight at a set temperature gradient, specifically: after drying at room temperature for 20-28 hours, it is dried at 35-45℃ for 8-16 hours, and then dried at 45-55℃ for 8-16 hours, so as to remove the moisture from the green body.

[0032] Optionally, the sintering process includes: heating to a set temperature to remove the cross-linked organic polymer network, residual monomers and initiators in the green body, and then heating to 1500~1600℃ and holding for 1.5~2.5h; since the first green bodies of the inlaid structure are all obtained by slip casting, the powders of the two are tightly bonded together, so the crystal structure obtained by co-sintering will also be tightly bonded together. The inlaid structure can effectively support the cavity of the textured groove from the inside, and there is no mechanically weak phase interface, thus avoiding the reduction of the mechanical properties of the final product.

[0033] One or more typical embodiments of the present invention provide a method for preparing the above-described self-lubricating ceramic with an inlaid structure, resulting in a self-lubricating ceramic with an inlaid structure.

[0034] Self-lubricating ceramics include a ceramic matrix with multiple textured grooves on its surface. These grooves are filled with inlay structures, which are tightly bonded to the ceramic matrix through a chemical bonding process formed by co-sintering.

[0035] The embedded structure is located in the ceramic matrix and has an exposed surface at the opening of the ceramic matrix, which can continuously release self-lubricating components. The lubrication effect is determined by the exposed surface of the embedded structure and the self-lubricating phase contained in the embedded structure. The larger the area of ​​the exposed surface, the larger the area that can release the self-lubricating phase, thus releasing more self-lubricating phase to the friction surface. The higher the concentration of the self-lubricating phase in the embedded structure, the more self-lubricating phase can be released to the friction surface.

[0036] Optionally, the area of ​​the inlay structure occupies 7 to 15% of the ceramic surface on which it is located.

[0037] Optionally, the textured groove is a dovetail groove, with the large end of the dovetail groove located inside the ceramic matrix; this gel-molded inlay lubricating phase material is significantly superior to ordinary inlay materials, enabling good embedding and bonding.

[0038] One or more typical embodiments of the present invention provide applications of the above-mentioned self-lubricating ceramics with inlay structures, including applications in self-lubricating ceramic tracks, sliding bearings and other ceramic sliding friction components or ceramic cutting tools.

[0039] The present invention will be further described below with reference to specific embodiments.

[0040] Example 1 A self-lubricating ceramic with an embedded structure is prepared by using methacrylamide as a monomer, methylenebisacrylamide as a crosslinking agent, ammonium persulfate as an initiator, tetramethylethylenediamine as a catalyst, polyacrylamide as a dispersant, n-octanol as an antifoaming agent, and ammonia as a pH adjuster in the raw materials.

[0041] The ceramic powders include alumina powder with a particle size of 500 nm and zirconium oxide powder with a particle size of 800 nm.

[0042] Preparation methods include: Add 15g deionized water, 2g methacrylamide (monomer), and 0.2g methylenebisacrylamide (crosslinking agent) to a container and stir magnetically for 5 minutes to obtain a suspension. Add ammonia to the suspension to adjust the pH to 9. Add 1.5g polyacrylamide (dispersant) to the suspension. Add alumina ceramic powder and zirconium oxide ceramic powder to the suspension to prepare a slurry with a solid content of 54 vol%. The volume ratio of alumina to zirconium oxide is 8:2, and the particle size of the alumina powder is 500 nm. m, the particle size of zirconium oxide powder is 800nm. The prepared slurry is ball-milled for 6h. After ball milling, two drops of n-octanol (defoamer) are added and the slurry is placed in a vacuum stirring device for vacuum defoaming for 5min. Prepare a 10wt% ammonium persulfate solution and a 10wt% tetramethylethylenediamine solution. Add 0.2g of ammonium persulfate (initiator) solution and 0.2g of tetramethylethylenediamine (catalyst) solution to the defoamed slurry in sequence, and continue to stir magnetically for 10min to obtain the first slurry.

[0043] Add a CaF2 lubricating phase with a particle size of 1 μm to the first slurry, so that CaF2 accounts for 5 vol%, 10 vol%, or 15 vol% of the sum of ceramic powder and CaF2, to obtain a second slurry with different amounts of lubricating phase added.

[0044] Preparation such as Figure 1 The mold shown is as follows: Figure 1 As shown, the inner cavity 2 of the mold is cylindrical, and the bottom surface 3 of the inner cavity is provided with multiple independent protrusions 1. The first slurry is injected into the mold, and the resulting first blank is as shown... Figure 2 As shown, the upper surface 5 obtained by molding the bottom surface 3 of the mold cavity has a textured groove 4, the shape of which is the same as the raised structure 1. A second slurry is injected into the textured groove 4 of the first blank, and molding is achieved as shown... Figure 3 The second blank shown has a second slurry forming a self-lubricating insert 6 in the textured groove 4.

[0045] The second green body was dried at room temperature for 24 hours, then at 40°C for 12 hours, and finally at 50°C for 12 hours to remove all moisture from the green body and achieve a constant weight.

[0046] The dried ceramic green body was placed in a pressureless sintering furnace and sintered in an air atmosphere. The heating and cooling rates during sintering were 2℃ / min. The temperature was raised to 450℃ and held for 1 hour, and then raised to 600℃ and held for 1 hour to remove the binder. After that, the temperature was raised to 1550℃ and held for 2 hours to obtain a self-lubricating ceramic sample. Its shape and structure were the same as the second green body. The first green body became the ceramic matrix. The upper surface of the self-lubricating insert and the upper surface of the ceramic matrix together formed the upper surface of the lubricating ceramic sample. The upper surface of the self-lubricating insert accounted for 9% of the upper surface area of ​​the lubricating ceramic sample. Since the ceramic matrix and the insert structure were obtained by co-sintering, their crystal structure was continuous and there was no interface between them.

[0047] In this embodiment, multiple self-lubricating ceramic samples were prepared. The raw materials for the inlay structure were selected from the second slurry in which CaF2 accounted for 5 vol%, 10 vol%, or 15 vol% of the total ceramic powder. The CaF content of the inlay structure in the obtained self-lubricating ceramic samples was 5 vol%, 10 vol%, and 15 vol%, respectively. The first slurry was used as the second slurry in which CaF2 accounted for 0 vol% of the total ceramic powder and injected into the textured groove of the first green body to prepare a self-lubricating ceramic sample with a CaF content of 0 vol%.

[0048] Test content The Vickers hardness of the inlaid material in Example 1 was tested using a hardness tester (HVS-50, Shanghai Taiming Optical Instrument Co., Ltd.). The load was 196N and the pressure was held at 196N for 15s. The test was conducted at six different locations, and the average value was taken as the final Vickers hardness.

[0049] The inlay structure was prepared separately, and the bending strength of the inlay material in Example 1 was tested using the three-point bending method with an AGS-X5KN electronic universal testing machine.

[0050] The coefficient of friction of the upper surface of the self-lubricating ceramic specimens obtained in Example 1 was determined using a tribological testing machine (THT, Anton Paar). The instrument was calibrated before testing, and repeated experiments were conducted for the same group of lubricating material fillers to ensure data stability. The testing conditions were a temperature of 24±1℃ and a humidity of 45%RH. Al₂O₃ balls were used for all friction pairs. The load between the ball and the plane was 5N, and the ball slid on the plane at a speed of 300 r / min with a rotation radius of 10 mm. The total test time was 1800 s.

[0051] The hardness was measured as follows Figure 4 As shown, the hardness decreases with increasing CaF2 content, indicating that the addition of the soft phase reduces the hardness of the insert, but it remains essentially at the same level as the ceramic matrix. Flexural strength is as follows... Figure 5As shown, the flexural strength decreases with increasing CaF2 content, indicating that the addition of the soft phase reduces the flexural strength of the inlay but remains essentially at the same level as the ceramic matrix. This means that the overall mechanical properties of the self-lubricating ceramic sample, formed by the co-sintering of the ceramic matrix and the inlay structure, are unified, with no obvious weak points. The average friction coefficient is as follows: Figure 6 As shown, the average friction coefficient of ceramics with a lubricating phase of 0 vol% is 0.749. When the texture-filled CaF2 content is 5 vol%, the friction coefficient is 0.352; when the texture-filled CaF2 content is 10 vol%, the friction coefficient is 0.225; and when the texture-filled CaF2 content is 15 vol%, the friction coefficient is 0.242.

[0052] Example 2 This embodiment provides a self-lubricating ceramic guide rail with a discontinuous mosaic structure. The preparation methods of the first slurry and the second slurry are the same as those in Embodiment 1, and CaF2 accounts for 10 vol of the ceramic powder in the second slurry.

[0053] The molds used, such as Figure 7 As shown, a raised textured groove forming part 8 is provided on the lower surface of the inner cavity 7 of the track mold, and guide rail joint forming parts are provided at both ends.

[0054] The mold is made of elastic material, and the textured groove forming part 8 is shaped with a larger top and a smaller bottom, so that the prepared track inlay structure 10 becomes a dovetail shape, with the larger end buried inside the green blank, which improves the mechanical bonding ability of the two.

[0055] After injection molding, gently shake the mold to eliminate uneven injection. After the slurry solidifies, it will achieve the desired result. Figure 8 The track preform shown has track texture grooves 9. A second slurry is filled into the track texture grooves 9, cured, and then dried at a gradient temperature until the preform reaches a constant weight to obtain the desired result. Figure 9 The self-lubricating ceramic track green body shown has a second slurry forming a track inlay structure 10 that fills the hollow texture.

[0056] The above embodiments provide a method for first preparing a first blank with textured grooves and then preparing a self-lubricating insert. If the self-lubricating insert is prepared first, and then a base blank is prepared by slip casting with a first slurry around the self-lubricating insert, the drying shrinkage of the base blank will lead to poor bonding between the base and the insert. If a dry mixing method is used to add the lubricating phase to the ceramic matrix and then fill it into the first blank, the material inside the textured grooves of the first blank is not tightly bonded, and the mechanical properties of the above embodiments cannot be obtained, resulting in poor component durability. The prepared green blank is sintered according to the sintering method in Embodiment 1 to obtain a self-lubricating ceramic guide rail. Although slip casting is a near-net-shape forming, the ceramic guide rail is a high-precision component, and it needs to be ground and polished after sintering to ensure that its surface quality meets the requirements of the working conditions.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for preparing a self-lubricating ceramic with an inlaid structure, characterized in that, Including the following steps: A first slurry containing monomers, crosslinking agents, initiators, catalysts, and ceramic powders is prepared, and then cast into a mold to obtain a first green body with textured grooves on the surface; a second slurry containing monomers, crosslinking agents, initiators, catalysts, ceramic powders, and a lubricating phase is prepared. The first slurry is poured into a mold to obtain a first blank with textured grooves on the surface. The second slurry is injected into the textured grooves of the first blank to form a self-lubricating insert. A second blank is obtained in which the textured grooves of the first blank are filled with the self-lubricating insert. The second blank is sintered to obtain a self-lubricating ceramic with an insert structure.

2. The method for preparing self-lubricating ceramic with an inlaid structure as described in claim 1, characterized in that, The monomer includes one or more of methacrylamide, acrylamide, and N-hydroxymethylacrylamide; the crosslinking agent includes one or more of methylenebisacrylamide, polyethylene glycol diacrylate, and ethylene glycol dimethacrylate; the initiator includes one or more of ammonium persulfate solution, ammonium bisulfate, and triethylenetetramine; the catalyst includes one or more of tetramethylethylenediamine solution, triethanolamine, and dimethylaniline; and the ceramic powder includes one or more of alumina powder, zirconium oxide powder, and chromium oxide powder. Alternatively, the particle size of the ceramic powder is 100nm~5μm; Alternatively, the ceramic powder includes alumina powder and zirconium oxide powder in a volume ratio of (3~5):1, and the solid content of the ceramic powder in the first slurry is 50~60 vol; the solid content of the ceramic powder in the second slurry is 50~60 vol.

3. The method for preparing self-lubricating ceramic with an inlaid structure as described in claim 1, characterized in that, The first and second slurries also include dispersants, defoamers, and pH adjusters, respectively; the dispersants include one or more of polyacrylamide, polyethylene glycol, and tetramethylammonium hydroxide, the defoamers are selected from one or more of n-octanol, isooctanol, and ethylene glycol monobutyl ether; and the pH adjusters are selected from one or more of ammonia, sodium hydroxide, and hydrochloric acid.

4. The method for preparing self-lubricating ceramic with an inlaid structure as described in claim 1, characterized in that, The lubricating phase includes one or more of Ca2F, h-BN and MoS2, with a particle size of 100 nm to 5 μm. In the second slurry, the lubricating phase is 5 to 20 vol of the sum of the ceramic powder and the lubricating phase in the second slurry.

5. The method for preparing self-lubricating ceramic with an inlaid structure as described in claim 1, characterized in that, The first slurry and the second slurry contain water, monomers, crosslinking agents, dispersants, initiators and catalysts in a mass ratio of 15:(1.5~2):(0.1~0.3):(1~2):(0.1~0.3):(0.1~0.3).

6. The method for preparing a self-lubricating ceramic with an inlaid structure as described in claim 1, characterized in that, Before sintering, the second green body is dried to constant weight at a set temperature gradient, specifically: after drying at room temperature for 20-28 hours, it is dried at 35-45℃ for 8-16 hours, and then dried at 45-55℃ for 8-16 hours.

7. The method for preparing a self-lubricating ceramic with an inlaid structure as described in claim 1, characterized in that, The sintering process includes: heating to a set temperature to remove the cross-linked organic polymer network, residual monomers and initiators in the green body, and then heating to 1500~1600℃ and holding for 1.5~2.5h.

8. The method for preparing a self-lubricating ceramic with an inlaid structure as described in claim 1, characterized in that, The texture groove is a dovetail groove.

9. A self-lubricating ceramic prepared by the method for preparing a self-lubricating ceramic with an inlaid structure as described in any one of claims 1-8, characterized in that, It includes a ceramic matrix with multiple textured grooves on its surface. The textured grooves are filled with inlay structures, and the inlay structures and the ceramic matrix are bonded together by a chemical bonding method formed by co-sintering.

10. An application of the self-lubricating ceramic as described in claim 9, characterized in that, This includes applications in self-lubricating ceramic tracks, sliding bearings, and other ceramic sliding friction components or ceramic cutting tools.

Images