Wear-resistant zirconium-aluminum-silicon composite ceramic material and preparation method thereof

Abstract

The invention discloses a wear-resistant zirconium-aluminum-silicon composite ceramic material and a preparation method thereof, and relates to the technical field of wear-resistant aluminum oxide ceramics, and the wear-resistant zirconium-aluminum-silicon composite ceramic material comprises the following preparation raw materials in parts by mass: 90 parts of aluminum oxide, 15-40 parts of fused quartz, 10-30 parts of zirconium frit, 2-8 parts of zirconium diboride, 1-7 parts of magnesium lithium silicate, 0.5-2.0 parts of cerium oxide and 0.3-1.5 parts of yttrium oxide. The aluminum oxide comprises micron aluminum oxide, nano aluminum oxide and mesoporous aluminum oxide. The preparation method of the wear-resistant zirconium-aluminum-silicon composite ceramic material comprises the following steps: S1, mixing and ball-milling the preparation raw materials according to the required ratio, and screening to obtain raw material powder; s2, respectively performing low-temperature oxidation calcination, vacuum hot-pressing calcination and high-temperature nitrogen calcination on the raw material powder. The wear-resistant zirconium-aluminum-silicon composite ceramic material disclosed by the invention is excellent in fracture toughness and can keep relatively good strength at high temperature.

Description

Technical Field

[0001] The invention belongs to the technical field of wear-resistant alumina ceramics, and in particular is a wear-resistant zirconium-aluminum-silicon composite ceramic material and a preparation method thereof. Background Art

[0002] Wear-resistant ceramics are an industrial material with high hardness, excellent wear resistance, high temperature resistance and corrosion resistance. They are widely used in the wear protection of industrial equipment and pipelines. Its main component is alumina, usually made of alumina powder as raw material, which is formed by dry pressing or isostatic pressing and then baked in a high-temperature kiln above 1700℃. In addition, rare metal oxides are added as flux, and combined with rubber or high-strength organic / inorganic adhesives to enhance its performance.

[0003] Wear-resistant ceramics have high hardness and wear resistance, but their brittleness limits their application in dynamic impact or load environments. Although wear-resistant ceramics have good high temperature tolerance, their temperature resistance is still limited by the temperature resistance of the material itself and the adhesive. In addition, the softening of the material in a high temperature environment will further aggravate the wear. Defects on the surface of wear-resistant ceramic parts (such as microcracks, grain shedding, etc.) will also accelerate the wear process. Summary of the invention

[0004] The present invention overcomes the problems of existing wear-resistant ceramics, such as high hardness but high brittleness, poor high temperature resistance and many surface defects. Therefore, the present invention provides a wear-resistant zirconium-aluminum-silicon composite ceramic material and a preparation method thereof. The wear-resistant zirconium-aluminum-silicon composite ceramic material has excellent mechanical strength, is not easy to break, and has good high temperature resistance and few surface defects.

[0005] The present invention solves the above technical problems through the following technical solutions.

[0006] The invention discloses a wear-resistant zirconium-aluminum-silicon composite ceramic material, comprising the following raw materials in parts by weight: 90 parts of aluminum oxide, 15 to 40 parts of fused quartz, 10 to 30 parts of zirconium frit, 2 to 8 parts of zirconium diboride, 1 to 7 parts of lithium magnesium silicate, 0.5 to 2.0 parts of cerium oxide and 0.3 to 1.5 parts of yttrium oxide;

[0007] Preferably, the wear-resistant zirconium-aluminum-silicon composite ceramic material comprises the following raw materials in parts by weight: 90 parts of aluminum oxide, 20 to 35 parts of fused quartz, 12 to 25 parts of zirconium frit, 2 to 5 parts of zirconium diboride, 1 to 5 parts of lithium magnesium silicate, 0.5 to 1.8 parts of cerium oxide and 0.3 to 1.2 parts of yttrium oxide;

[0008] The alumina includes micron alumina, nano alumina and mesoporous alumina;

[0009] The mass ratio of the micron alumina: the nano alumina: the mesoporous alumina is 50:15-30:0.5-5;

[0010] Preferably, the mass ratio of the micron alumina: the nano alumina: the mesoporous alumina is 50:25-30:1-3.5.

[0011] The main component of wear-resistant zirconium-aluminum-silicon composite ceramic material is alumina. Nano-alumina has a high specific surface area and excellent thermal conductivity, which can improve the thermal conductivity of micron alumina, thereby improving the thermal stability of ceramics. However, nano-alumina is very brittle, and when it is added in a high proportion, it may lead to a decrease in the mechanical properties of the ceramic. The zirconium frit contains a high content of zirconium silicate and has a high hardness; zirconium diboride has a low density and a moderate thermal expansion coefficient, and has high temperature resistance and wear resistance. Both can provide high mechanical strength for wear-resistant zirconium-aluminum-silicon composite ceramic material composite materials. However, zirconium diboride has a high melting point and a small particle size, and is easy to agglomerate during the sintering process. Its thermal expansion coefficient is higher than that of alumina, so its melting performance in alumina ceramics is poor. The viscosity and fluidity of fused quartz at high temperatures can increase the connection strength between alumina and zirconium diboride, thereby improving the sintering performance of ceramics. Cerium oxide and yttrium oxide can be used as toughening agents for wear-resistant zirconium-aluminum-silicon composite ceramic materials, which can improve the toughness of the material by grain boundary strengthening or particle strengthening. Cerium oxide and yttrium oxide can also react with mesoporous alumina with high surface energy to form a stable interface, thereby enhancing the mechanical properties of the material.

[0012] In the present invention, the D50 of the micron alumina is ≤10 μm, and preferably, the D50 of the micron alumina is 5 to 6 μm.

[0013] In the present invention, the D50 of the nano-alumina is ≤50nm; preferably, the D50 of the nano-alumina is 20-30nm.

[0014] In the present invention, the average pore diameter of the mesoporous alumina is 6-8 nm, for example, 7.19 nm.

[0015] In the present invention, the specific surface area of ​​the mesoporous alumina is 140 to 150 m 2 / g, for example 144.8m 2 / g.

[0016] In the present invention, the total pore volume of the mesoporous alumina is 0.24 to 0.27 cm 3 / g, for example 0.260cm 3 / g.

[0017] In the present invention, the particle size of the zirconium diboride is 100-200 nm.

[0018] In the present invention, the zirconium frit comprises the following chemical components by mass fraction: 3-8% Al2O3, 12-20% CaO, 0.5-2% MgO, 1-4% K2O, 7-15% ZrO2, 6-10% ZnO and the balance SiO2.

[0019] In the present invention, the fracture toughness of the wear-resistant zirconium-aluminum-silicon composite ceramic material is 6.0-6.7 MPa·m 1 / 2 .

[0020] In the present invention, the flexural strength of the wear-resistant zirconium-aluminum-silicon composite ceramic material is 780-792 MPa.

[0021] The present invention also discloses a method for preparing a wear-resistant zirconium-aluminum-silicon composite ceramic material, comprising the following steps:

[0022] S1. The raw materials are mixed and ball-milled according to the desired ratio and sieved to obtain a raw material powder;

[0023] S2. The raw material powder is subjected to low-temperature oxidation calcination, vacuum hot pressing calcination and high-temperature nitrogen calcination respectively to obtain a wear-resistant zirconium-aluminum-silicon composite ceramic material.

[0024] In S1, the ball-to-material ratio of the ball mill is 4 to 5:1.

[0025] In S1, the ball milling time is 4 to 10 hours.

[0026] In S1, the mesh size of the screening is 500-800 meshes.

[0027] In S2, the temperature of the low temperature oxidation sintering is 750-900°C and the time is 3-5 hours.

[0028] In S2, the atmosphere of the low-temperature oxidation sintering contains oxygen with a volume fraction of 15-20%.

[0029] In S2, the main purpose of low-temperature oxidation sintering is to pre-sinter the alumina and zirconium ingots. Through this process, the crystal transformation of alumina can be promoted, and impurities can be removed, thereby avoiding pores or grain boundary defects caused by residual impurities during the subsequent high-temperature sintering process. This helps to significantly improve the density and purity of wear-resistant zirconium-aluminum-silicon composite ceramic materials. In addition, low-temperature oxidation sintering can also activate the two toughening agents, cerium oxide and yttrium oxide, and promote the formation of their liquid phase, thereby effectively reducing the temperature requirements during the subsequent sintering process.

[0030] In S2, the vacuum hot pressing calcination is carried out at a temperature of 1000-1100°C and for a time of 3-5 hours.

[0031] In S2, the pressure of the vacuum hot pressing calcination is 20 to 30 MPa.

[0032] In S2, the vacuum degree of the vacuum hot pressing calcination is 1-5Pa.

[0033] In S2, vacuum hot pressing calcination is a hot pressing sintering process carried out in a vacuum environment. In this process, physical pressure is applied to squeeze the gaps between particles, thereby promoting the densification of the material. At the same time, the vacuum environment can effectively avoid the destruction of easily oxidized components (such as zirconium diboride) by the oxidizing environment. In addition, the liquid phase formed by the gradual decomposition of molten quartz and lithium magnesium silicate at high temperature can be evenly dispersed under vacuum conditions, further promoting grain growth and densification of the sintered body. At the same time, the zirconium silicate in the zirconium frit decomposes into zirconium oxide and silicon oxide at high temperatures, and the vacuum environment can avoid excessive oxidation of zirconium oxide, thereby enhancing the toughness of the wear-resistant zirconium-aluminum-silicon composite ceramic material.

[0034] In S2, the high temperature nitrogen sintering temperature is 1500-1700°C and the time is 5-8h;

[0035] In S2, the pressure of nitrogen during the high-temperature nitrogen sintering is 2-3 MPa.

[0036] In S2, the high-temperature nitrogen sintering nitrogen environment inhibits excessive grain growth, maintains the fine-grained structure, and maintains the high strength and toughness of the wear-resistant zirconium-aluminum-silicon composite ceramic material.

[0037] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The wear-resistant zirconium-aluminum-silicon composite ceramic material of the present invention has alumina as the main component in the raw materials for preparation. Although nano-alumina can improve thermal stability, excessive addition will reduce the mechanical properties; zirconium frit and zirconium diboride can improve mechanical strength, but zirconium diboride is easy to agglomerate and has poor melting properties, and fused quartz can improve its sintering properties; cerium oxide and yttrium oxide serve as toughening agents, which enhance the toughness of the material through grain boundary or particle strengthening, and form a stable interface with mesoporous alumina to improve mechanical properties.

[0040] 2. The calcination of the present invention is divided into three stages, namely, low-temperature oxidation calcination, vacuum hot pressing calcination and high-temperature nitrogen calcination. The main purpose of low-temperature oxidation sintering is to pre-sinter the alumina and zirconium frits to promote crystal transformation and remove impurities, thereby improving the density and purity of the material. In addition, it can also activate toughening agents such as cerium oxide and yttrium oxide to reduce the sintering temperature. Vacuum hot pressing calcination is a hot pressing sintering process carried out under a vacuum environment. It squeezes the gaps between particles through physical pressure to avoid the destruction of the easily oxidized components by the oxidizing environment, while promoting the formation of the liquid phase and enhancing the toughness of the material. High-temperature nitrogen sintering suppresses the excessive growth of grains through the nitrogen environment, maintains a fine-grained structure, and thus maintains the high strength and toughness of the material.

[0041] 3. The wear-resistant zirconium-aluminum-silicon composite ceramic material of the present invention has high fracture toughness and flexural strength. In some preferred embodiments, its fracture toughness can reach 6.0-6.7 MPa·m 1 / 2 , its flexural strength is 780~792MPa. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a comparison diagram of the appearance of the wear-resistant zirconium-aluminum-silicon composite ceramic material of Example 1 and Comparative Example 1. DETAILED DESCRIPTION

[0043] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and carefully in combination with preferred embodiments below, but the protection scope of the present invention is not limited to the following specific embodiments.

[0044] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0045] The "range" disclosed in the present invention is defined in the form of a lower limit and an upper limit, and a given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of a particular range. The range defined in this way can be inclusive or exclusive of end values, and can be combined arbitrarily, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 60-120 and 80-110 is listed for a specific parameter, it is understood that the range of 60-110 and 80-120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the present invention, unless otherwise specified, the numerical range "ab" represents an abbreviation of any real number combination between a and b, wherein a and b are real numbers. For example, the numerical range "0-5" represents that all real numbers between "0-5" have been fully listed herein, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0046] If not otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form a new technical solution.

[0047] Unless otherwise specified, all technical features and optional technical features of the present invention can be combined with each other to form a new technical solution.

[0048] If not otherwise specified, all steps of the present invention may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0049] If there is no special explanation, the "include" and "comprising" mentioned in the present invention represent open-ended or closed-ended expressions. For example, the "include" and "comprising" may represent that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0050] If not specifically stated, in the present invention, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0051] The raw materials used in the following examples are as follows:

[0052] Nano alumina D50 = 20nm; micron alumina D50 = 5μm.

[0053] The average pore size of mesoporous alumina is 7.19 nm and the specific surface area is 144.8 m 2 / g, total pore volume is 0.260cm 3 / g.

[0054] Fused quartz was purchased from Lianyungang Taosheng Fused Silica Co., Ltd.

[0055] Lithium magnesium silicate was purchased from Shijiazhuang Lishang Mineral Products Processing Co., Ltd.

[0056] The particle size of zirconium diboride is 100-200 nm and was purchased from Zhejiang Zhiti Nano Micro New Materials Co., Ltd.

[0057] The composition of the zirconium frit is 6.3% Al2O3, 16.3% CaO, 1.8% MgO, 3.3% K2O, 13.4% ZrO2, 7.1% ZnO and the balance SiO2.

[0058] Example 1

[0059] 1. The wear-resistant zirconium-aluminum-silicon composite ceramic material of this embodiment is prepared by the following raw materials in parts by mass: 90 parts of aluminum oxide, 20 parts of fused quartz, 18 parts of zirconium frit, 3.2 parts of zirconium diboride, 2.3 parts of lithium magnesium silicate, 0.87 parts of cerium oxide and 0.62 parts of yttrium oxide;

[0060] The mass ratio of micron alumina: nano alumina: mesoporous alumina in alumina is 50:25:3.

[0061] 2. The preparation method of the wear-resistant zirconium-aluminum-silicon composite ceramic material of this embodiment is as follows:

[0062] S1. The raw material prepared above was ball-milled for 8h, the ball-to-material ratio was 5:1, and then sieved through a 600 mesh sieve to obtain a raw material powder;

[0063] S2. The raw material powders were subjected to low-temperature oxidation calcination, vacuum hot pressing calcination and high-temperature nitrogen calcination, and then cooled in the furnace to obtain a wear-resistant zirconium-aluminum-silicon composite ceramic material;

[0064] The temperature of low temperature oxidation sintering is 800°C, the time is 3h, and the volume fraction of oxygen in the atmosphere is 18%;

[0065] The temperature of vacuum hot pressing calcination is 1100°C, the time is 3h, the pressure is 25MPa, and the vacuum degree is 1Pa;

[0066] The temperature of high-temperature nitrogen sintering is 1600°C, the time is 7 hours, and the pressure of nitrogen is 2.5MPa.

[0067] The surface appearance of the wear-resistant zirconium-aluminum-silicon composite ceramic material obtained in this embodiment is shown in FIG. Figure 1 Left picture, the apparent quality is uniform and there are no obvious defects.

[0068] Example 2

[0069] The difference between this embodiment and embodiment 1 is that:

[0070] The wear-resistant zirconium-aluminum-silicon composite ceramic material of this embodiment is prepared by the following raw materials in parts by mass: 90 parts of aluminum oxide, 25 parts of fused quartz, 13 parts of zirconium frit, 4.7 parts of zirconium diboride, 3.6 parts of lithium magnesium silicate, 1.20 parts of cerium oxide and 0.43 parts of yttrium oxide.

[0071] Other steps and parameters are the same as in Example 1.

[0072] Example 3

[0073] The difference between this embodiment and embodiment 1 is that:

[0074] The mass ratio of micron alumina: nano alumina: mesoporous alumina in alumina is 50:30:2.

[0075] Other steps and parameters are the same as in Example 1.

[0076] Example 4

[0077] The difference between this embodiment and embodiment 1 is that:

[0078] The wear-resistant zirconium-aluminum-silicon composite ceramic material of this embodiment is prepared by the following raw materials in parts by mass: 90 parts of aluminum oxide, 28 parts of fused quartz, 13 parts of zirconium frit, 5 parts of zirconium diboride, 1.5 parts of lithium magnesium silicate, 1.8 parts of cerium oxide and 0.3 parts of yttrium oxide.

[0079] The mass ratio of micron alumina: nano alumina: mesoporous alumina in alumina is 50:30:3.5.

[0080] Other steps and parameters are the same as in Example 1.

[0081] Example 5

[0082] The difference between this embodiment and embodiment 1 is that:

[0083] The temperature of low temperature oxidation sintering is 750°C, the time is 4h, and the volume fraction of oxygen in the atmosphere is 15%;

[0084] The temperature of vacuum hot pressing calcination is 1000°C, the time is 4h, the pressure is 30MPa, and the vacuum degree is 3Pa;

[0085] The temperature of high-temperature nitrogen sintering is 1700°C, the time is 5 hours, and the pressure of nitrogen is 3MPa.

[0086] Other steps and parameters are the same as in Example 1.

[0087] Comparative Example 1

[0088] The difference between this comparative example and Example 1 is:

[0089] The wear-resistant zirconium-aluminum-silicon composite ceramic material of this comparative example is composed of the following raw materials in parts by mass: 90 parts of aluminum oxide, 25 parts of quartz powder, 16.4 parts of zirconium frit, 3.8 parts of zirconium diboride, 4.2 parts of lithium magnesium silicate, 0.78 parts of cerium oxide and 0.52 parts of yttrium oxide.

[0090] Quartz powder was purchased from Lianyungang Haosen Mineral Products Co., Ltd., with a particle size distribution of 10 to 53 μm.

[0091] Other steps and parameters are the same as in Example 1.

[0092] The surface appearance of the wear-resistant zirconium-aluminum-silicon composite ceramic material obtained in this comparative example is shown in FIG. Figure 1 Right picture.

[0093] Comparative Example 2

[0094] The difference between this comparative example and Example 1 is:

[0095] The mass ratio of micron alumina:nano alumina in alumina is 2:1, and it does not contain mesoporous alumina.

[0096] Other steps and parameters are the same as in Example 1.

[0097] Comparative Example 3

[0098] The difference between this comparative example and Example 1 is:

[0099] The wear-resistant zirconium-aluminum-silicon composite ceramic material of this comparative example is composed of the following raw materials in parts by mass: 90 parts of aluminum oxide, 30 parts of fused quartz, 15 parts of zirconium frit, 4.3 parts of lithium magnesium silicate, 1.0 part of cerium oxide and 0.6 part of yttrium oxide.

[0100] Comparative Example 4

[0101] The difference between this comparative example and Example 1 is:

[0102] This comparative example does not contain a low-temperature oxidation sintering process;

[0103] The temperature of vacuum hot pressing calcination is 1300°C, the time is 2h, the pressure is 30MPa, and the vacuum degree is 1Pa;

[0104] Other steps and parameters are the same as in Example 1.

[0105] Test Case

[0106] The fracture toughness and flexural strength test results of the wear-resistant zirconium-aluminum-silicon composite ceramic materials prepared in the above examples and comparative examples are shown in Table 1.

[0107] The fracture toughness test method refers to GB / T 23806; the flexural strength test method refers to GB / T14390, and the test temperature is 1000℃.

[0108] Table 1

[0109] Project Number <![CDATA[Fracture toughness (MPa·m 1 / 2 )]]> Flexural strength(MPa) Example 1 6.63 787 Example 2 6.55 784 Example 3 6.48 790 Example 4 6.27 786 Example 5 6.61 792 Comparative Example 1 4.88 678 Comparative Example 2 5.41 629 Comparative Example 3 3.63 527 Comparative Example 4 4.39 745

[0110] According to Table 1 and the attached figures, it can be seen that: Comparative Example 1 uses ordinary quartz powder instead of fused quartz, and the connection performance of quartz powder is relatively poor compared to fused quartz. Therefore, the wear-resistant zirconium-aluminum-silicon composite ceramic material finally obtained has more surface defects locally, such as more pinholes and bulges. In Comparative Example 2, no mesoporous alumina is added, and only the effects of yttrium oxide and cerium oxide are relied on, and the toughening effect is not good. In Comparative Example 3, zirconium diboride is not added, which causes the overall strength of the wear-resistant zirconium-aluminum-silicon composite ceramic material to decrease to varying degrees.

[0111] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods. The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wear-resistant zirconium-aluminum-silicon composite ceramic material, characterized in that: The preparation method comprises the following raw materials in parts by weight: 90 parts of aluminum oxide, 15 to 40 parts of fused quartz, 10 to 30 parts of zirconium frit, 2 to 8 parts of zirconium diboride, 1 to 7 parts of lithium magnesium silicate, 0.5 to 2.0 parts of cerium oxide and 0.3 to 1.5 parts of yttrium oxide; The alumina includes micron alumina, nano alumina and mesoporous alumina.

2. The wear-resistant zirconium-aluminum-silicon composite ceramic material according to claim 1, characterized in that: The mass ratio of the micron alumina: the nano alumina: the mesoporous alumina is 50:15-30:0.5-5.

3. The wear-resistant zirconium-aluminum-silicon composite ceramic material according to claim 1, characterized in that: Satisfy at least one of the following conditions ① to ⑤: ① The D50 of the micron alumina is ≤10 μm; ② The D50 of the nano-alumina is ≤50nm; ③ The average pore size of the mesoporous alumina is 6 to 8 nm; ④ The total pore volume of the mesoporous alumina is 0.24 to 0.27 cm 3 / g; ⑤ The particle size of the zirconium diboride is 100 to 200 nm.

4. The wear-resistant zirconium-aluminum-silicon composite ceramic material according to claim 1, characterized in that: The zirconium frit comprises the following chemical components by mass fraction: 3-8% Al2O3, 12-20% CaO, 0.5-2% MgO, 1-4% K2O, 7-15% ZrO2, 6-10% ZnO and the balance SiO2.

5. The wear-resistant zirconium-aluminum-silicon composite ceramic material according to claim 1, characterized in that: Satisfy at least one of the following conditions ①~②: ① The fracture toughness of the wear-resistant zirconium-aluminum-silicon composite ceramic material is 6.0-6.7 MPa·m 1 / 2 ; ② The flexural strength of the wear-resistant zirconium-aluminum-silicon composite ceramic material is 780-792 MPa.

6. The method for preparing the wear-resistant zirconium-aluminum-silicon composite ceramic material according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. The raw materials are mixed and ball-milled according to the desired ratio and sieved to obtain a raw material powder; S2. The raw material powder is subjected to low-temperature oxidation calcination, vacuum hot pressing calcination and high-temperature nitrogen calcination respectively to obtain a wear-resistant zirconium-aluminum-silicon composite ceramic material.

7. The method for preparing the wear-resistant zirconium-aluminum-silicon composite ceramic material according to claim 6, characterized in that: Satisfy at least one of the following conditions ① to ③: ① The ball-to-material ratio of the ball mill is 4 to 5:1; ② The ball milling time is 4 to 10 hours; ③ The mesh number of the screening is 500 to 800 meshes.

8. The method for preparing the wear-resistant zirconium-aluminum-silicon composite ceramic material according to claim 6, characterized in that: Satisfy at least one of the following conditions ①~②: ① The temperature of the low temperature oxidation sintering is 750-900°C and the time is 3-5h; ② The atmosphere of the low-temperature oxidation sintering contains 15-20% oxygen by volume.

9. The method for preparing the wear-resistant zirconium-aluminum-silicon composite ceramic material according to claim 6, characterized in that: Satisfy at least one of the following conditions ① to ③: ① The temperature of the vacuum hot pressing calcination is 1000-1100°C and the time is 3-5h; ② The pressure of the vacuum hot pressing calcination is 20-30MPa; ③ The vacuum degree of the vacuum hot pressing calcination is 1-5Pa.

10. The method for preparing the wear-resistant zirconium-aluminum-silicon composite ceramic material according to claim 6, characterized in that: Satisfy at least one of the following conditions ①~②: ① The temperature of the high temperature nitrogen sintering is 1500-1700°C and the time is 5-8h; ② The pressure of nitrogen used in the high-temperature nitrogen sintering is 2-3 MPa.

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