An enhanced copper-carbon composite material and a method for preparing the same

Abstract

The application discloses a preparation method of an enhanced copper-carbon composite material, and relates to the technical field of composite materials, which comprises a copper matrix, carbon nanoparticles subjected to surface modification and nanoscale metal alloy particles; the carbon nanoparticles are prepared by a chemical vapor deposition method and are uniformly dispersed in the copper matrix after being subjected to surface modification; the metal alloy particles comprise lanthanide rare earth elements and are used for enhancing the mechanical properties and thermal stability of the composite material, so that the overall performance of the composite material is remarkably improved; in the technical scheme, the mechanical properties of the composite material are remarkably enhanced, the carbon nanoparticles with the metal oxide coating on the surface can effectively improve the interface bonding force between the copper matrix and the carbon nanoparticles, so that the tensile strength of the composite material is further improved, and by accurately controlling the volume fraction of the carbon nanoparticles and the nanoscale metal alloy particles, the best balance between the electrical conductivity and the mechanical properties of the composite material is achieved.

Description

Technical Field

[0001] This invention relates to the field of composite materials technology, and in particular to a method for preparing an enhanced copper-carbon composite material. Background Technology

[0002] With the development of technology, the demand for high-performance conductive materials is increasing. While traditional pure copper possesses good conductivity and processing properties, it falls short in certain specialized applications (such as battery connectors for electric vehicles) due to its relatively low mechanical strength and poor thermal stability. To overcome these issues, researchers have begun exploring the introduction of carbon nanomaterials into copper matrices to form copper-carbon composites, aiming to improve the overall performance of copper-based materials through the superior properties of carbon nanomaterials.

[0003] However, existing copper-carbon composite materials still face some challenges in practical applications. These include unstable composite properties due to uneven distribution of carbon nanoparticles within the copper matrix, and decreased mechanical properties caused by creep at high temperatures. Furthermore, traditional preparation methods often struggle to control the microstructure within the composite material, preventing it from achieving optimal overall performance.

[0004] Therefore, a method for preparing reinforced copper-carbon composite materials is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method for preparing an enhanced copper-carbon composite material, so as to solve the problems in the background art.

[0006] In view of this, the present invention provides a method for preparing an enhanced copper-carbon composite material, the composite material comprising a copper matrix, surface-modified carbon nanoparticles, and nanoscale metal alloy particles.

[0007] The carbon nanoparticles were prepared by chemical vapor deposition and uniformly dispersed in a copper matrix after surface modification.

[0008] The metal alloy particles contain lanthanide rare earth elements to enhance the mechanical properties and thermal stability of the composite material, thereby significantly improving the overall performance of the composite material.

[0009] Optionally, the carbon nanoparticles are carbon nanotubes with a metal oxide coating on their surface, which are used to enhance the interfacial bonding force between the copper matrix and the carbon nanoparticles, thereby further improving the tensile strength of the composite material.

[0010] Optionally, the copper matrix contains trace amounts of zinc (Zn) 0.5 wt.%, tin (Sn) 0.3 wt.%, or nickel (Ni) 0.2 wt.%, and an appropriate amount of silver (Ag) 0.1 wt.%, to improve the heat resistance, fatigue resistance, and electrical conductivity of the composite material.

[0011] Optionally, the volume fraction of the carbon nanoparticles is 2.5% to 3.5%, and the volume fraction of the nanoscale metal alloy particles is 1% to 1.5%, to achieve the best balance of mechanical properties.

[0012] Optionally, after laser surface modification treatment, the surface hardness of the composite material is increased to above HV400, and its wear resistance is significantly enhanced.

[0013] This invention also protects a method for preparing an enhanced copper-carbon composite material, comprising the following steps:

[0014] a) Mix copper powder, carbon nanoparticles and nanoscale metal alloy particles;

[0015] b) Perform hot isostatic pressing under an argon protective atmosphere at a temperature between 950°C and 1050°C, a pressure between 300 MPa and 400 MPa, and a processing time between 2 and 3 hours.

[0016] c) A secondary heat treatment is performed under nitrogen protection at a temperature between 550°C and 650°C for 1.5 to 2.5 hours to eliminate internal stress and further strengthen the interfacial bonding.

[0017] Optionally, step a) further includes adding a surfactant to promote the uniform distribution of carbon nanoparticles in the copper matrix and using ultrasonic treatment to reduce agglomeration, thereby improving the uniformity and density of the final composite material.

[0018] Optionally, the hot isostatic pressing process may further include a preheating stage, with a preheating temperature between 800°C and 900°C and a time between 30 minutes and 1 hour, to improve the effect of subsequent heat treatment.

[0019] Optionally, the secondary heat treatment process also includes a rapid cooling step, with the cooling rate controlled between 10°C / min and 20°C / min, to avoid grain growth and ensure the stability of the microstructure of the composite material.

[0020] Optionally, the carbon nanoparticles are further grafted with polymer chains to enhance the interfacial interaction with the copper matrix, and the polymer chains are polyvinyl alcohol or polyacrylic acid, so as to further improve the interfacial bonding strength and overall mechanical properties of the composite material.

[0021] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

[0022] 1. The present invention discloses a method for preparing an enhanced copper-carbon composite material. By introducing surface-modified carbon nanoparticles and nanoscale metal alloy particles containing lanthanide rare earth elements into a copper matrix, the mechanical properties of the composite material are significantly enhanced. In particular, the carbon nanoparticles with a metal oxide coating on their surface can effectively improve the interfacial bonding force between the copper matrix and the carbon nanoparticles, thereby further improving the tensile strength of the composite material. Furthermore, by precisely controlling the volume fraction of carbon nanoparticles and nanoscale metal alloy particles, an optimal balance between the electrical conductivity and mechanical properties of the composite material is achieved, while also ensuring that the composite material has excellent creep resistance.

[0023] 2. The present invention provides a method for preparing an enhanced copper-carbon composite material. The addition of lanthanide rare earth element nanoscale metal alloy particles not only enhances the mechanical properties of the composite material but also improves its thermal stability, enabling the composite material to maintain good mechanical properties at higher temperatures, making it suitable for temperature-sensitive applications.

[0024] 3. The present invention provides a method for preparing an enhanced copper-carbon composite material. In the preparation process, a surfactant is added and ultrasonic treatment is used, which effectively promotes the uniform distribution of carbon nanoparticles in the copper matrix, reduces agglomeration, and improves the uniformity and density of the final composite material.

[0025] 4. The present invention provides a method for preparing an enhanced copper-carbon composite material, which improves the surface hardness and wear resistance of the composite material through laser surface modification treatment, making it more suitable for manufacturing high-performance conductive components.

[0026] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a flowchart of the preparation method of the present invention. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0032] The following describes in detail, with reference to the accompanying drawings, a method for preparing an enhanced copper-carbon composite material according to an embodiment of the present invention.

[0033] Example 1

[0034] For easier understanding, please refer to Figure 1 An embodiment of the preparation method of an enhanced copper-carbon composite material provided by the present invention includes a copper matrix, surface-modified carbon nanoparticles, and nanoscale metal alloy particles.

[0035] The carbon nanoparticles were prepared by chemical vapor deposition (CVD) and uniformly dispersed in a copper matrix after surface modification.

[0036] The metal alloy particles contain lanthanide rare earth elements to enhance the mechanical properties and thermal stability of the composite material, thereby significantly improving the overall performance of the composite material.

[0037] It should be noted that carbon nanoparticles preferably use carbon nanotubes with a metal oxide coating (such as Al2O3 or TiO2) on their surface, as these can enhance the interfacial bonding between the copper matrix and the carbon nanoparticles, thereby further improving the tensile strength of the composite material. The volume fraction of carbon nanoparticles is preferably 2% to 4%. The nanoscale metal alloy particles contain lanthanide rare earth elements, which can enhance the mechanical properties and thermal stability of the composite material. Their volume fraction is preferably 0.5% to 2% to achieve the best balance between electrical conductivity and mechanical properties, and to ensure that the composite material has excellent creep resistance. The copper matrix itself may contain trace amounts of zinc (Zn), tin (Sn), or nickel (Ni) alloying elements to improve the heat resistance and fatigue resistance of the composite material, enabling it to maintain good mechanical properties at higher temperature environments.

[0038] In some embodiments, the carbon nanoparticles are carbon nanotubes with a metal oxide coating (such as Al2O3 or TiO2) on their surface, which are used to enhance the interfacial bonding force between the copper matrix and the carbon nanoparticles, thereby further improving the tensile strength of the composite material.

[0039] In some embodiments, the copper matrix comprises trace amounts of alloying elements, including 0.5 wt.% zinc (Zn), 0.3 wt.% tin (Sn), or 0.2 wt.% nickel (Ni), and an appropriate amount of 0.1 wt.% silver (Ag), to improve the composite material's heat resistance, fatigue resistance, and electrical conductivity. The carbon nanoparticles have a volume fraction of 2.5% to 3.5%, and the nanoscale metal alloy particles have a volume fraction of 1% to 1.5% to achieve an optimal balance of mechanical properties. After laser surface modification treatment, the surface hardness of the composite material is increased to above HV400, and its wear resistance is significantly enhanced.

[0040] Lanthanum (La) or neodymium (Nd) can be selected as representative lanthanide rare earth elements and added to the composite material. The specific ratio can be adjusted according to actual needs. Generally, a volume fraction of 1% to 1.5% can effectively improve the mechanical properties and thermal stability of the composite material without excessively affecting other properties such as electrical conductivity.

[0041] This embodiment enhances the mechanical properties and thermal stability of the composite material. It improves the tensile strength, heat resistance, fatigue resistance, and electrical conductivity of the composite material. It also improves the surface hardness and wear resistance of the material, making it suitable for manufacturing high-performance conductive components.

[0042] Example 2

[0043] In some embodiments, a method for preparing an enhanced copper-carbon composite material is also protected, comprising the following steps:

[0044] a) Mix copper powder, carbon nanoparticles and nanoscale metal alloy particles;

[0045] b) Perform hot isostatic pressing under an argon protective atmosphere at a temperature between 950°C and 1050°C, a pressure between 300 MPa and 400 MPa, and a processing time between 2 and 3 hours.

[0046] c) A secondary heat treatment is performed under nitrogen protection at a temperature between 550°C and 650°C for 1.5 to 2.5 hours to eliminate internal stress and further strengthen the interfacial bonding.

[0047] Step a) further includes adding a surfactant (such as zinc stearate) to promote the uniform distribution of carbon nanoparticles in the copper matrix and using ultrasonic treatment to reduce agglomeration, thereby improving the uniformity and density of the final composite material.

[0048] The process before hot isostatic pressing also includes a preheating stage, with a preheating temperature between 800°C and 900°C and a time between 30 minutes and 1 hour, in order to improve the effect of subsequent heat treatment.

[0049] The secondary heat treatment process also includes a rapid cooling step, with the cooling rate controlled between 10°C / min and 20°C / min to avoid grain growth and ensure the stability of the microstructure of the composite material.

[0050] The carbon nanoparticles are further grafted with polymer chains to enhance the interfacial interaction with the copper matrix, and the polymer chains are polyvinyl alcohol (PVA) or polyacrylic acid (PAA) to further improve the interfacial bonding strength and overall mechanical properties of the composite material.

[0051] It should be noted that copper powder, carbon nanoparticles, and nanoscale metal alloy particles are mixed in a predetermined ratio. To promote the uniform distribution of carbon nanoparticles in the copper matrix, a surfactant (such as zinc stearate) can be added, and ultrasonic treatment can be used to reduce agglomeration. Under an argon protective atmosphere, the mixed powder is placed in a hot isostatic pressing (HIP) apparatus for treatment. The treatment conditions are a temperature of 950℃ to 1050℃, a pressure of 300MPa to 400MPa, and a treatment time of 2 to 3 hours. Before HIP treatment, a preheating stage can be performed at a temperature of 800℃ to 900℃ for 30 minutes to 1 hour, which can improve the effect of subsequent heat treatment.

[0052] Under nitrogen protection, the pre-formed composite material undergoes a secondary heat treatment at a temperature between 550°C and 650°C for 1.5 to 2.5 hours. This process helps eliminate internal stress and further strengthens interfacial bonding. After the secondary heat treatment, the cooling rate is controlled between 10°C / min and 20°C / min to prevent grain growth and ensure the stability of the composite material's microstructure.

[0053] Finally, laser surface modification can be used to improve the surface hardness and wear resistance of composite materials, making them more suitable for manufacturing high-performance conductive components such as battery connectors for electric vehicles.

[0054] One approach is to further enhance the interfacial interaction between carbon nanoparticles and the copper matrix by grafting polymer chains (such as polyvinyl alcohol PVA or polyacrylic acid PAA), thereby improving the overall mechanical properties of the composite material.

[0055] Lanthanum (La) or neodymium (Nd) can be selected as representative lanthanide rare earth elements and added to the composite material. The specific ratio can be adjusted according to actual needs. Generally, a volume fraction of 1% to 1.5% can effectively improve the mechanical properties and thermal stability of the composite material without excessively affecting other properties such as electrical conductivity.

[0056] In this embodiment, internal stress was eliminated and interfacial bonding was strengthened through hot isostatic pressing and secondary heat treatment. Rapid cooling prevented grain growth and maintained microstructural stability. Ultrasonic treatment reduced the aggregation of carbon nanoparticles, improving the uniformity and density of the material.

[0057] Example 3

[0058] In some embodiments, a method for preparing an enhanced copper-carbon composite material is also protected, wherein copper powder with a purity greater than 99.9% is selected as the matrix material;

[0059] The carbon nanoparticles used are carbon nanotubes with an Al2O3 coating on their surface, and the volume fraction is set to 3%.

[0060] The lanthanide rare earth element nanoscale metal alloy particles are set at a volume fraction of 1.5%. The copper matrix contains trace amounts of zinc (Zn) at a mass percentage of 0.2% to improve the heat resistance of the composite material.

[0061] After weighing the above materials according to the proportions, add an appropriate amount of zinc stearate as a surfactant in a ball mill, and use ultrasonic treatment for 30 minutes to ensure the uniform distribution of carbon nanoparticles in the copper matrix.

[0062] The mixed powder was placed in a hot isostatic pressing (HIP) vessel and subjected to HIP under argon protection at a temperature of 1000℃, a pressure of 350MPa, and a processing time of 2.5 hours. Prior to this, a preheating treatment at 900℃ for 1 hour was performed to improve the bonding strength between the powder particles. After HIP, a second heat treatment was performed under nitrogen protection at 600℃ for 2 hours. Subsequently, cooling was carried out at a rate of 15℃ / min to prevent abnormal grain growth.

[0063] Finally, the composite material was subjected to laser surface modification treatment to improve its surface hardness and wear resistance, and the mechanical properties of the composite material were evaluated by tensile tests, hardness tests and other means.

[0064] In this embodiment, high-purity copper powder ensures the quality of the matrix material. Al2O3-coated CNTs enhance interfacial adhesion. La-based nanoalloy particles improve mechanical properties and thermal stability. Controlled cooling rate prevents abnormal grain growth.

[0065] Example 4

[0066] In some embodiments, a method for preparing an enhanced copper-carbon composite material is also protected, using copper powder with a purity greater than 99.9% as the matrix material;

[0067] The carbon nanoparticles were selected from carbon nanotubes coated with Al2O3 and TiO2 respectively, with a volume fraction of 3% for each.

[0068] The composite material contains nanoscale metallic alloy particles of lanthanide rare earth elements, with a volume fraction of 1%. The copper matrix contains trace amounts of tin (Sn), at a mass percentage of 0.3%, to improve the fatigue resistance of the composite material.

[0069] Copper powder, two types of carbon nanoparticles, and metal alloy particles were mixed in a specific ratio, and zinc stearate was added as a surfactant. Ultrasonic treatment was performed for 45 minutes to reduce the aggregation of carbon nanoparticles. Hot isostatic pressing (HIP) was then performed under argon protection at a temperature of 980℃ and a pressure of 320 MPa for 2 hours. The preheating stage was performed at 850℃ for 45 minutes. A second heat treatment was then performed under nitrogen protection at 580℃ for 2 hours. Finally, cooling was carried out at a rate of 12℃ / min.

[0070] For each type of carbon nanoparticle coating, a method of grafting polyacrylic acid (PAA) was used to enhance interfacial interactions. Finally, laser surface modification was employed to improve the surface hardness and wear resistance of the composite material, and performance tests were conducted to compare the performance differences of the composite material under different coating conditions.

[0071] In this embodiment, the TiO2-coated CNTs provide additional interfacial bonding enhancement. Grafted PAA enhances interfacial interactions. Performance testing under different coating conditions helps optimize material formulation.

[0072] Example 5

[0073] Material selection: Copper powder with a purity greater than 99.9% was used as the matrix material; carbon nanoparticles were selected from carbon nanotubes (CNTs) with a SiO2 coating on the surface, with a volume fraction of 3%; lanthanide rare earth elements (such as lanthanum La or neodymium Nd) nanoscale metal alloy particles were selected, with a volume fraction of 1%; the copper matrix contained trace amounts of aluminum (Al), with a mass percentage of 0.4%, to further improve the heat resistance and fatigue resistance of the composite material.

[0074] Carbon nanoparticle processing: Carbon nanoparticles are prepared by chemical vapor deposition (CVD) and a SiO2 coating is deposited on their surface to enhance the interfacial bonding between the carbon nanoparticles and the copper substrate.

[0075] Mixing and pretreatment: Copper powder, carbon nanoparticles and metal alloy particles are weighed in proportion, and an appropriate amount of zinc stearate is added as a surfactant in a ball mill. The mixture is then ultrasonically treated for 45 minutes to ensure uniform distribution of carbon nanoparticles in the copper matrix.

[0076] Hot isostatic pressing (HIP): HIP is performed under argon protection at a temperature of 1000℃, a pressure of 350MPa, and a processing time of 2.5 hours. Prior to this, a preheating treatment at 900℃ for 1 hour is performed to improve the bonding strength between the powders.

[0077] Secondary heat treatment: After hot isostatic pressing, a secondary heat treatment is performed under nitrogen protection at a temperature of 600℃ for 2 hours. Subsequently, cooling is carried out at a rate of 15℃ / min to avoid abnormal grain growth.

[0078] Surface modification: Laser surface modification treatment is applied to composite materials to improve their surface hardness and wear resistance.

[0079] Performance testing: The mechanical properties of the composite material are evaluated through tensile tests, hardness tests, and other methods, and the grafted polyacrylic acid (PAA) is evaluated to enhance interfacial interactions.

[0080] Beneficial effects: SiO2-coated CNTs enhance interfacial bonding and improve the tensile strength of composite materials.

[0081] The addition of aluminum (Al) further enhances the heat resistance and fatigue resistance of the composite material. PAA grafting strengthens interfacial interactions and improves the overall mechanical properties of the composite. Controlling the cooling rate prevents abnormal grain growth and maintains the stability of the material's microstructure.

[0082] Comparative Example 1

[0083] Material selection: Copper powder with a purity greater than 99.9% is used as the matrix material; ordinary carbon nanotubes (CNTs) without surface modification are set at a volume fraction of 3%; pure copper powder without any rare earth elements and no additional nanoscale metal alloy particles are added; the copper matrix contains trace amounts of zinc (Zn) at a mass percentage of 0.2%.

[0084] Mixing and pretreatment: Copper powder and carbon nanoparticles are weighed in proportion and then directly mixed without adding surfactants or undergoing ultrasonic treatment.

[0085] Hot isostatic pressing (HIP): The HIP is performed under argon protection. The conditions are: temperature 1000℃, pressure 350MPa, and processing time 2.5 hours.

[0086] Secondary heat treatment: After hot isostatic pressing, a secondary heat treatment is performed under nitrogen protection at a temperature of 600℃ for 2 hours. Afterward, it is allowed to cool naturally to room temperature.

[0087] Surface modification: No laser surface modification treatment is performed on the composite material.

[0088] Performance testing: The mechanical properties of composite materials are evaluated through tensile tests, hardness tests, and other methods.

[0089] Mechanical properties: Due to the absence of nanoscale metal alloy particles containing lanthanide rare earth elements, the mechanical properties of the composite material are poor.

[0090] Interfacial bonding strength: Since the carbon nanoparticles have not undergone surface modification treatment, the interfacial bonding strength between them and the copper matrix is ​​weak, resulting in a decrease in the overall performance of the composite material.

[0091] Surface hardness and wear resistance: Due to the lack of laser surface modification treatment, the surface hardness and wear resistance of the composite material are not as good as those shown in the examples.

[0092] Uniformity and density: Due to the lack of surfactant and ultrasonic treatment, the carbon nanoparticles are not evenly distributed in the copper matrix, resulting in low material density.

[0093] In summary, lanthanum (La) or neodymium (Nd) can be selected as representative lanthanide rare earth elements and added to composite materials. The specific ratio can be adjusted according to actual needs. Generally, a volume fraction of 1% to 1.5% can effectively improve the mechanical properties and thermal stability of the composite material without excessively affecting other properties such as electrical conductivity.

[0094] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A reinforced copper-carbon composite material, characterized in that, The composite material comprises a copper matrix, surface-modified carbon nanoparticles, and nanoscale metal alloy particles; The carbon nanoparticles were prepared by chemical vapor deposition and uniformly dispersed in a copper matrix after surface modification. The metal alloy particles contain lanthanide rare earth elements to enhance the mechanical properties and thermal stability of the composite material.

2. The reinforced copper-carbon composite material according to claim 1, characterized in that, The carbon nanoparticles are carbon nanotubes with a metal oxide coating on their surface, used to enhance the interfacial bonding between the copper substrate and the carbon nanoparticles.

3. The reinforced copper-carbon composite material according to claim 1, characterized in that, The copper matrix contains trace amounts of alloying elements, such as 0.5 wt.% zinc, 0.3 wt.% tin or 0.2 wt.% nickel, and an appropriate amount of 0.1 wt.% silver, to improve the heat resistance, fatigue resistance and electrical conductivity of the composite material.

4. The reinforced copper-carbon composite material according to claim 1, characterized in that, The carbon nanoparticles have a volume fraction of 2.5% to 3.5%, and the nanoscale metal alloy particles have a volume fraction of 1% to 1.5%, in order to achieve the best balance of mechanical properties.

5. The reinforced copper-carbon composite material according to claim 1, characterized in that, After laser surface modification treatment, the surface hardness of the composite material is increased to above HV400, and its wear resistance is significantly enhanced.

6. A method for preparing an enhanced copper-carbon composite material according to any one of claims 1-5, characterized in that, Includes the following steps: a) Mix copper powder, carbon nanoparticles and nanoscale metal alloy particles; b) Perform hot isostatic pressing under an argon protective atmosphere at a temperature between 950°C and 1050°C, a pressure between 300 MPa and 400 MPa, and a processing time between 2 and 3 hours. c) A secondary heat treatment is performed under nitrogen protection at a temperature between 550°C and 650°C for 1.5 to 2.5 hours to eliminate internal stress.

7. The method for preparing an enhanced copper-carbon composite material according to claim 6, characterized in that, Step a) further includes adding a surfactant to promote the uniform distribution of carbon nanoparticles in the copper matrix and using ultrasonic treatment to reduce agglomeration.

8. The method for preparing an enhanced copper-carbon composite material according to claim 6, characterized in that, The hot isostatic pressing process also includes a preheating stage, with a preheating temperature between 800°C and 900°C and a time between 30 minutes and 1 hour.

9. The method for preparing an enhanced copper-carbon composite material according to claim 6, characterized in that, The secondary heat treatment process also includes a rapid cooling step, with the cooling rate controlled between 10°C / min and 20°C / min to avoid grain growth.

10. The method for preparing an enhanced copper-carbon composite material according to claim 6, characterized in that, The carbon nanoparticles are also grafted with polymer chains to enhance their interfacial interaction with the copper matrix, and the polymer chains are polyvinyl alcohol or polyacrylic acid.

Images