A diamond and negative expansion particle-reinforced aluminum matrix composite material and its preparation method

Abstract

This invention provides a diamond and negative thermal expansion particle-reinforced aluminum matrix composite material and its preparation method, belonging to the field of composite material technology. The aluminum matrix composite material consists of a diamond phase and a negative thermal expansion phase dispersed in an aluminum matrix; the average particle size of the diamond phase is 10-1000 μm, and the ratio of the average particle size of the diamond phase to the average particle size of the negative thermal expansion particles is 10-20; the particle size of the negative thermal expansion particles adjacent to the diamond phase is smaller than that of the negative thermal expansion particles farther from the diamond phase. By controlling the volume fraction of diamond and negative thermal expansion particles, a diamond and negative thermal expansion particle-reinforced aluminum matrix composite material with excellent thermophysical properties is obtained. Through a synergistic optimization strategy, a thermal expansion coefficient matching that of semiconductor materials is obtained, which can be applied in the field of electronic packaging heat dissipation materials.

Description

Technical Field

[0001] This invention belongs to the field of composite material technology, and specifically relates to a diamond and negative expansion particle reinforced aluminum matrix composite material and its preparation method. Background Technology

[0002] Traditional metal-based composite materials have mismatched coefficients of thermal expansion with semiconductor materials such as silicon, germanium, and gallium nitride. In electronic packaging, aerospace, and optical devices, temperature changes are a serious problem causing thermal stress. When the coefficient of thermal expansion of a material does not match the surrounding environment, temperature changes can lead to internal stress, causing cracks and fractures. Negative expansion materials can effectively solve the problem of thermal stress. They can provide thermal expansion characteristics opposite to those of the surrounding materials, reducing or even offsetting thermal stress between materials, thereby improving the reliability and durability of the overall structure.

[0003] Diamond possesses high hardness, chemical stability, high light transmittance, and isotropic thermal conductivity, reaching up to 2000 W / mK, while its coefficient of thermal expansion is only 1.5 × 10⁻⁶. -6 / K is an ideal heat dissipation material. In recent years, artificially synthesized diamond particles have become an ideal reinforcement for metal matrix composites due to their simple processing and low cost. Negative expansion particles have a wide range of adjustable coefficients of thermal expansion and excellent negative expansion properties, which can suppress the positive coefficient of thermal expansion of the metal matrix, thereby obtaining composites with lower coefficients of thermal expansion. Metallic aluminum and aluminum alloys have good processing performance, mechanical properties, and high thermal conductivity. Both negative expansion particle-reinforced aluminum matrix composites and diamond-reinforced aluminum matrix composites have been reported, but there is still room for optimization in the performance control of these composites. For example, the intrinsic low thermal conductivity and high bulk agglomeration of negative expansion particles can lead to a significant decrease in the thermal conductivity of low-expansion aluminum matrix composites; while the interfacial reaction between diamond and the aluminum matrix results in weak bonding at the composite interface, severely limiting the thermophysical properties of the composite. On the other hand, interfacial gaps are easily formed at the interface during cooling, resulting in a large interfacial thermal resistance, affecting the effective heat conduction of the composite, reducing the density of the composite, and limiting the control range of the coefficient of thermal expansion of the composite. Chinese invention patent CN114411010A discloses a method for manufacturing a low-expansion diamond-reinforced aluminum-based composite material. However, the composite material has a thermal expansion coefficient as high as 6 ppm, which still differs from that of Si chips. Furthermore, advanced semiconductor materials have rapid thermal start-up and high cycle counts; mismatch between the thermal expansion of the packaging material and the chip can lead to device cracking. Therefore, preparing a negative-expansion, diamond-reinforced aluminum-based composite material with high thermal conductivity and a low thermal expansion coefficient, thereby increasing the controllable range of the composite material's thermal expansion coefficient, has significant scientific and engineering implications. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a diamond and negative expansion particle-reinforced aluminum matrix composite material and its preparation method. By controlling the volume fraction of diamond and negative expansion particles, a diamond and negative expansion particle-reinforced aluminum matrix composite material with excellent thermophysical properties is obtained. Through a synergistic optimization strategy, a thermal expansion coefficient matching that of semiconductor materials is obtained, which can be applied in the field of electronic packaging heat dissipation materials.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] On one hand, the present invention provides a diamond and negative thermal expansion particle reinforced aluminum matrix composite material, wherein the aluminum matrix composite material is composed of a diamond phase and a negative thermal expansion phase dispersed in an aluminum matrix; the average particle size of the diamond phase is 10-1000 μm, and the ratio of the average particle size of the diamond phase to the average particle size of the negative thermal expansion particles is 10-20; the particle size of the negative thermal expansion particles adjacent to the diamond phase is smaller than the particle size of the negative thermal expansion particles far from the diamond phase.

[0007] Furthermore, the volume fraction of the diamond phase is 30-80%; the volume fraction of the negative thermal expansion ceramic phase is 10%-40%; and the volume fraction of the aluminum matrix is ​​at least 10%.

[0008] Furthermore, the negative thermal expansion phase is ZrW2O8, Cu2P2O7, Cu2V2O7, PbTiO3, ZrMo2O8, or Mn3Zn. 1- x Sn x N or Mn3Zn 1-x Ge x One or more of N, 0 <x<1。

[0009] Furthermore, the aluminum matrix is ​​pure aluminum or an aluminum alloy.

[0010] Furthermore, the particle size range of the negative thermal expansion particles adjacent to the diamond phase is no greater than 0.5 μm.

[0011] On the other hand, the present invention provides a method for preparing the above-mentioned diamond and negative thermal expansion particle reinforced aluminum matrix composite material. Diamond powder, negative thermal expansion particles and aluminum matrix material are weighed according to the proportion; the diamond powder and negative thermal expansion particles are mixed and placed in a graphite mold and compacted; the aluminum matrix material is placed on top of the graphite mold; the graphite mold is vacuum heated to melt, and after holding at the temperature for a preset time, it is subjected to pressure heat preservation treatment; after the pressure heat preservation treatment is completed, it is cooled to obtain the final product.

[0012] Furthermore, the average particle size of the diamond powder is 10-1000 μm; the ratio of the average particle size of the diamond phase to the average particle size of the negative thermal expansion particles is 10-20.

[0013] Furthermore, the D5 of the negative thermal expansion particles is not greater than 0.5 μm.

[0014] Furthermore, the vacuum heating process is as follows: the vacuum degree of the melting furnace is ≤1Pa, the heating rate is 20~80℃ / min, and the temperature is held at Tm~Tm+150℃ for 20~70min, where Tm is the melting point of the aluminum matrix.

[0015] Furthermore, the pressurization and heat preservation process is as follows: pressurize with inert gas to 0.5-2.5 MPa, and maintain the temperature and pressure at Tm-Tm+150℃ for 10-60 minutes, where Tm is the melting point of the aluminum matrix.

[0016] The beneficial effects of the technical solutions provided by the embodiments of the present invention include:

[0017] 1. This invention mixes diamond and negative thermal expansion particles, effectively reducing the thermal expansion properties of the composite material and increasing the interfacial bonding force. The matrix metal is selected as pure aluminum or an aluminum alloy, ensuring the composite material maintains good mechanical properties and thermal conductivity. During the composite process, the negative thermal expansion particles also inhibit the expansion of the aluminum matrix, improving the mismatch between the thermal expansion coefficients of diamond and the aluminum matrix, further reducing the thermal expansion coefficient of the diamond-aluminum composite material.

[0018] 2. This invention utilizes a gas pressure infiltration process to maintain full contact between the solid-phase mixed reinforcement and the solid-phase metal matrix under high pressure. The aluminum matrix melts at high temperature, allowing the molten aluminum matrix to be fully injected into the pores of the diamond and negative thermal expansion particles, ensuring the high density of the diamond-hybrid negative thermal expansion particle / aluminum matrix composite material. Simultaneously, this preparation process allows for control of infiltration temperature, pressure, and time, minimizing interfacial reactions between the two phases. Due to the high density of the prepared composite material, this preparation process can solve the problems of internal porosity and other defects found in composite materials prepared by other processes. The vacuum conditions effectively prevent oxidation of the aluminum metal during the reaction process, ensuring the purity of the prepared negative thermal expansion particle + diamond hybrid reinforced aluminum matrix composite material. Under high pressure and temperature control, the interfacial bonding between the metal and the diamond negative thermal expansion particles is strengthened, resulting in increased elastic modulus and strength of the obtained negative thermal expansion particle + diamond hybrid reinforced aluminum matrix composite material.

[0019] 3. The synthesis procedure of the negative thermal expansion particles + diamond hybrid reinforced aluminum matrix composite material prepared by this invention is simple and flexible, the equipment investment cost is low, the preparation process is simple, the raw material price is low, and the matrix pure aluminum or aluminum alloy is widely available and easy to obtain, resulting in low cost and making the composite material have a very broad application prospect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 SEM image of the diamond and negative expansion particle-reinforced aluminum matrix composite material prepared in Example 1 of this invention;

[0022] Figure 2 The thermal expansion curves of the diamond and negative expansion particle-reinforced aluminum matrix composite material prepared in Example 1 of this invention are shown. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] This invention provides a diamond and negative thermal expansion particle reinforced aluminum matrix composite material, wherein the aluminum matrix composite material is composed of a diamond phase and a negative thermal expansion phase dispersed in an aluminum matrix; the average particle size of the diamond phase is 10-1000 μm, and the ratio of the average particle size of the diamond phase to the average particle size of the negative thermal expansion particles is 10-20; the particle size of the negative thermal expansion particles adjacent to the diamond phase is smaller than the particle size of the negative thermal expansion particles far from the diamond phase.

[0025] In this invention, the aluminum matrix is strengthened by using diamond phase and negative thermal expansion phase. The diamond phase has a high thermal conductivity coefficient and a low expansion coefficient. However, there are corresponding problems in the composite of diamond and aluminum matrix. The poor wettability between diamond and aluminum liquid leads to cracks easily occurring at the interface between the diamond phase and the aluminum matrix in the subsequent deformation process of the prepared composite material. In the prior art, the surface of diamond is usually treated to improve its bonding strength with the aluminum matrix. In this application, by adding negative thermal expansion particles with a certain particle size, the wettability between the aluminum matrix and the surface of diamond particles can be improved. On the other hand, there are also corresponding problems in the composite of negative thermal expansion particles and the aluminum matrix. Since the negative thermal expansion particles and the aluminum matrix have opposite expansion coefficients, there is a large stress between the interface of the negative thermal expansion phase and the aluminum matrix in the prepared composite material. When the local stress exceeds the maximum allowable stress at the location, cracks appear, resulting in the negative thermal expansion particles being unable to effectively pull the aluminum matrix, and the expansion coefficient of the composite material increases. In the composite material prepared in this application, the particle size of the negative thermal expansion particles adjacent to the diamond phase is smaller than that of the negative thermal expansion particles far from the diamond phase. The smaller particle size of the negative thermal expansion particles increases the wettability between the aluminum liquid and the diamond phase. Secondly, part of the aluminum can react with diamond to generate Al4C3 to coordinate the stress between the negative thermal expansion particles and the aluminum matrix.

[0026] Specifically, the volume fraction of the diamond phase is 30 - 80%; the volume fraction of the negative thermal expansion ceramic phase is 10% - 40%, and the volume fraction of the aluminum matrix is at least 10%.

[0027] Specifically, the negative thermal expansion phase is one or more of ZrW2O8, Cu2P2O7, Cu2V2O7, PbTiO3, ZrMo2O8, Mn3Zn 1-x Sn x N or Mn3Zn 1-x Ge x N, where 0 < x < 1. Exemplarily, in this application, the negative expansion particles adopt ZrW2O8 and Cu2P2O7.

[0028] Specifically, the aluminum matrix is pure aluminum or aluminum alloy. The aluminum alloy includes but is not limited to Al - Mg, Al - Mn, Al - Si - Mg, Al - Mg - Zn - Cu.

[0029] Specifically, the particle size range of the negative thermal expansion particles adjacent to the diamond phase is not greater than 0.5 μm. The particle size of the negative thermal expansion particles affects their wettability between the aluminum liquid and the diamond surface on the one hand, and affects the generation of Al4C3 on the other hand, thus affecting the deformation coordination ability of the diamond phase, the aluminum matrix and the negative thermal expansion phase at the interface position. Limiting the negative thermal expansion particles within the above range can achieve the above effects.

[0030] This invention also discloses a method for preparing the above-mentioned diamond and negative expansion particle-reinforced aluminum matrix composite material, comprising:

[0031] S1 Weigh out diamond powder, negative thermal expansion particles, and aluminum matrix material according to the specified proportions. The aluminum matrix material can be aluminum granules or aluminum blocks, and the D5 of the negative thermal expansion particles is not greater than 0.5 μm.

[0032] S2. The diamond powder and negative thermal expansion particles are mixed and placed in a graphite mold, then compacted. The aluminum matrix material is then placed on top of the graphite mold. Specifically, ball milling can be used for mixing. The ball milling time should not be too long. Preferably, the material-to-ball ratio is 0.8-1.1, the ball milling speed is 200-300 r / min, and the ball milling time should not exceed 10 minutes.

[0033] S3 melts the graphite mold under vacuum heating, holds it at the temperature for a preset time, and then performs pressurization and heat preservation treatment.

[0034] The vacuum heating process is as follows: the vacuum degree of the melting furnace is ≤1Pa, the heating rate is 20~80℃ / min, and the temperature is held at Tm~Tm+150℃ for 20~70min, where Tm is the melting point of the base aluminum particles.

[0035] The pressurization and heat preservation process is as follows: pressurize with inert gas to 0.5-2.5 MPa, and keep at Tm-Tm+150℃ for 10-60 minutes, where Tm is the melting point of the base aluminum particles.

[0036] The product is obtained by cooling after the S4 pressurization and heat preservation treatment is completed.

[0037] This invention, through the above-described process, can prepare negative thermal expansion particles adjacent to the diamond phase with a smaller particle size than those far from the diamond phase. The principle is as follows: after the aluminum matrix material melts, it enters the gap between the diamond powder and the negative thermal expansion particles. The small-sized negative thermal expansion particles preferentially aggregate on the surface of the molten aluminum and are likely to be carried to the surface of the diamond powder as the molten aluminum flows, thereby achieving diamond surface modification and coordinating the stress between the three phases. Secondly, the preparation process needs to consider the reaction between diamond and the aluminum matrix, and try to avoid generating too much Al4C3 phase. Nano-sized Al4C3 has a certain toughness and can well coordinate the deformation between the three phases. For example, the thickness of the Al4C3 phase is no more than 10 nm, which has good toughness, while the thickness is large, the hardness is large, the brittleness is large, and the ability to coordinate deformation is weakened.

[0038] To better illustrate the embodiments of the present invention, the present invention will be further described in detail below through specific examples.

[0039] Example 1

[0040] This invention provides a diamond and negative expansion particle-reinforced aluminum matrix composite material and its preparation method, comprising:

[0041] S1 Weigh out diamond powder, ZrW2O8 particles, and pure aluminum. The volume fraction of diamond powder is 50%, the volume fraction of ZrW2O8 particles is 25%, and the remainder is pure aluminum. The average particle size of the diamond powder is 100 μm, and the average particle size of the ZrW2O8 particles is 9.5 μm with a D5 of 0.4 μm.

[0042] S2 mixes the diamond powder with ZrW2O8 particles and places the mixture in a graphite mold, compacts it, and then places the pure aluminum on top of the graphite mold.

[0043] S3 melts the graphite mold under vacuum heating, holds it at the temperature for a preset time, and then performs pressurization and heat preservation treatment.

[0044] The vacuum heating process is as follows: the vacuum degree of the melting furnace is ≤1Pa, the heating rate is 40℃ / min, and the temperature is held at 670℃ for 30min.

[0045] The pressurization and heat preservation process is as follows: pressurize to 1.5 MPa with inert gas and maintain the temperature and pressure at 670°C for 30 minutes.

[0046] The product is obtained by cooling after the S4 pressurization and heat preservation treatment is completed.

[0047] The morphology of the prepared aluminum-based composite material is as follows Figure 1 As shown, black represents the diamond phase, white represents the ZrW2O8 phase, and gray represents pure aluminum. It can be seen that the prepared diamond and negative expansion particle-reinforced aluminum matrix composite material has a dense structure, the negative thermal expansion phase adjacent to the diamond phase is small in size, and no cracks appear at the three-phase interface.

[0048] Measurements showed that the thermal conductivity of the prepared aluminum-based composite material was 679 W / (m·K). Figure 2 As shown, the red line represents the linear expansion coefficient of pure aluminum. It can be seen that the aluminum-based composite material prepared in this embodiment can significantly reduce the expansion coefficient. The thermal expansion coefficient of the aluminum-based composite material prepared in this embodiment is 2.5 × 10⁻⁶. -6 / K.

[0049] Example 2

[0050] This invention provides a diamond and negative expansion particle-reinforced aluminum matrix composite material and its preparation method, comprising:

[0051] S1 Weigh out diamond powder, ZrW2O8 particles, and pure aluminum. The volume fraction of diamond powder is 30%, the volume fraction of ZrW2O8 particles is 10%, and the remainder is pure aluminum. The average particle size of the diamond powder is 10 μm, and the average particle size of the ZrW2O8 particles is 1 μm with a D5 of 0.1 μm.

[0052] S2 mixes the diamond powder with ZrW2O8 particles and places the mixture in a graphite mold, compacts it, and then places the pure aluminum on top of the graphite mold.

[0053] S3 melts the graphite mold under vacuum heating, holds it at the temperature for a preset time, and then performs pressurization and heat preservation treatment.

[0054] The vacuum heating process is as follows: the vacuum degree of the melting furnace is ≤1Pa, the heating rate is 20℃ / min, and the temperature is held at 670℃ for 20min.

[0055] The pressurization and heat preservation process is as follows: pressurize to 0.5 MPa with inert gas and maintain the temperature and pressure at 670°C for 10 minutes.

[0056] The product is obtained by cooling after the S4 pressurization and heat preservation treatment is completed.

[0057] The prepared diamond and negative expansion particle-reinforced aluminum matrix composite material has a dense structure, the negative thermal expansion phase adjacent to the diamond phase is small in size, and no cracks appear at the three-phase interface.

[0058] Measurements showed that the prepared aluminum-based composite material had a thermal conductivity of 535 W / (m·K) and a coefficient of thermal expansion of 5.2 × 10⁻⁶. -6 / K.

[0059] Example 3

[0060] This invention provides a diamond and negative expansion particle-reinforced aluminum matrix composite material and its preparation method, comprising:

[0061] S1 Weigh out diamond powder, ZrW2O8 particles, and pure aluminum. The volume fraction of diamond powder is 70%, the volume fraction of ZrW2O8 particles is 10%, and the remainder is pure aluminum. The average particle size of the diamond powder is 900 μm, and the average particle size of the ZrW2O8 particles is 50 μm with a D5 of 0.5 μm.

[0062] S2 mixes the diamond powder with ZrW2O8 particles and places the mixture in a graphite mold, compacts it, and then places the pure aluminum on top of the graphite mold.

[0063] S3 melts the graphite mold under vacuum heating, holds it at the temperature for a preset time, and then performs pressurization and heat preservation treatment.

[0064] The vacuum heating process is as follows: the vacuum degree of the melting furnace is ≤1Pa, the heating rate is 80℃ / min, and the temperature is held at 670℃ for 70min.

[0065] The pressurization and heat preservation process is as follows: pressurize to 2.5 MPa with inert gas and maintain the temperature and pressure at 670°C for 60 minutes.

[0066] The product is obtained by cooling after the S4 pressurization and heat preservation treatment is completed.

[0067] The prepared diamond and negative expansion particle-reinforced aluminum matrix composite material has a dense structure, the negative thermal expansion phase adjacent to the diamond phase is small in size, and no cracks appear at the three-phase interface.

[0068] Measurements showed that the prepared aluminum-based composite material had a thermal conductivity of 694 W / (m·K) and a coefficient of thermal expansion of 3.1 × 10⁻⁶. -6 / K.

[0069] Example 4

[0070] Unlike Example 1, in step S1 of this example, the average particle size of Cu2P2O7 particles is 10 μm and the D5 is 0.1 μm.

[0071] The prepared diamond and negative expansion particle-reinforced aluminum matrix composite material has a dense structure, and the negative thermal expansion phase adjacent to the diamond phase is small in size. When the reduction rate is 20%, no cracks appear at the three-phase interface.

[0072] Measurements showed that the prepared aluminum-based composite material had a thermal conductivity of 526 W / (m·K) and a coefficient of thermal expansion of 3.19 × 10⁻⁶ W / (m·K). -6 / K.

[0073] Comparative Example 1

[0074] Unlike Example 1, in step S1 of this comparative example, the D5 of the ZrW2O8 particles is 0.7 μm.

[0075] The prepared diamond and negative expansion particle-reinforced aluminum matrix composite material exhibited cracks between the diamond phase and the aluminum matrix at a reduction rate of 20%. When the D5 particle size was large, the diamond surface could not be effectively modified, resulting in poor bonding between the diamond phase and the aluminum matrix.

[0076] Comparative Example 2

[0077] Unlike Example 1, in step S1 of this comparative example, the average particle size of the diamond powder is 100 μm, and the average particle size of the ZrW2O8 particles is 4 μm with a D5 of 0.1 μm.

[0078] The prepared diamond and negative thermal expansion particle-reinforced aluminum matrix composite exhibited poor microstructure uniformity, with cracks appearing at the three-phase interface at a reduction rate of 20%. Due to the large size difference between the diamond powder and the negative thermal expansion particles, smaller particles deposited at the bottom, while larger particles deposited at the top, resulting in a non-uniform microstructure.

[0079] Comparative Example 3

[0080] Unlike Example 2, in step S3 of this comparative example, the temperature is maintained at 670°C for 100 minutes.

[0081] The diamond and negative expansion particle reinforced aluminum matrix composite material prepared exhibits cracks between the diamond phase and the aluminum matrix when the reduction rate is 20%. This is because the generated Al4C3 phase is too large and too thick, which weakens the deformation coordination ability.

[0082] Comparative Example 4

[0083] Unlike Example 1, in step S3 of this comparative example, the temperature is maintained at 670°C for 15 minutes.

[0084] The prepared diamond and negative expansion particle reinforced aluminum matrix composite has a porous microstructure. When the reduction rate is 20%, cracks are generated between the diamond phase and the aluminum matrix in the prepared diamond and negative expansion particle reinforced aluminum matrix composite.

[0085] The above description is only a preferred 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 within the protection scope of the present invention.

Claims

1. A diamond and negative expansion particle-reinforced aluminum matrix composite material, characterized in that, The aluminum-based composite material is composed of a diamond phase and a negative thermal expansion phase dispersed in an aluminum matrix; the average particle size of the diamond phase is 10-1000 μm, and the ratio of the average particle size of the diamond phase to the average particle size of the negative thermal expansion particles is 10-20. The particle size of the negative thermal expansion particles adjacent to the diamond phase is smaller than the particle size of the negative thermal expansion particles far from the diamond phase. The volume fraction of the diamond phase is 30-80%; the volume fraction of the negative thermal expansion phase is 10%-40%; and the volume fraction of the aluminum matrix is ​​at least 20%. The preparation method of the diamond and negative expansion particle reinforced aluminum matrix composite material includes: Weigh out the diamond powder, negative thermal expansion particles and aluminum matrix material according to the proportions; The diamond powder and negative thermal expansion particles are mixed and placed in a graphite mold, then vibrated to compact the mixture. The aluminum matrix material is then placed on top of the graphite mold. The graphite mold is melted by vacuum heating, and after being kept at the temperature for a preset time, it is subjected to pressure and heat preservation treatment. After the pressurization and heat preservation treatment is completed, the product is cooled and obtained. The D5 of the negative thermal expansion particles is not greater than 0.5 μm; The vacuum heating process is as follows: the vacuum degree of the melting furnace is ≤1Pa, the heating rate is 20~80℃ / min, and the temperature is held at Tm~Tm+150℃ for 20~70min, where Tm is the melting point of the aluminum matrix.

2. The diamond and negative expansion particle-reinforced aluminum matrix composite material according to claim 1, characterized in that, The negative thermal expansion phase is ZrW2O8, Cu2P2O7, Cu2V2O7, PbTiO3, ZrMo2O8, or Mn3Zn. 1-x Sn x N or Mn3Zn 1-x Ge x One or more of N, where 0 < x < 1.

3. The diamond and negative expansion particle-reinforced aluminum matrix composite material according to claim 1, characterized in that, The aluminum matrix is ​​pure aluminum or an aluminum alloy.

4. The diamond and negative expansion particle-reinforced aluminum matrix composite material according to claim 1, characterized in that, The particle size range of the negative thermal expansion particles adjacent to the diamond phase is no greater than 0.5 μm.

5. The diamond and negative expansion particle-reinforced aluminum matrix composite material according to claim 1, characterized in that, The average particle size of the diamond powder is 10-1000 μm; the ratio of the average particle size of the diamond phase to the average particle size of the negative thermal expansion particles is 10-20.

6. The diamond and negative expansion particle-reinforced aluminum matrix composite material according to claim 1, characterized in that, The pressurization and heat preservation process is as follows: pressurize with inert gas to 0.5~2.5 MPa, and keep at Tm~Tm+150℃ for 10~60 minutes, where Tm is the melting point of the aluminum matrix.

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