Tungsten-copper-based alloy material as well as preparation method and application thereof

Abstract

The invention discloses a tungsten-copper-based alloy material as well as a preparation method and application thereof, and relates to the technical field of alloy materials. Lanthanum hexaboride and / or yttrium hexaboride are / is introduced into the tungsten copper material to serve as an additive, and irradiation damage of the tungsten copper material is avoided by means of the shielding capacity of boron to neutron irradiation; and meanwhile, lanthanum hexaboride or yttrium hexaboride is stable in property and has a particle reinforcing effect, so that the mechanical property of the tungsten copper material is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy materials, and in particular to a tungsten-copper based alloy material, a preparation method thereof and applications. Background Art

[0002] During nuclear fusion reactions, the plasma facing component (PFC) must withstand severe heat flux loads and a certain amount of neutron irradiation. Tungsten copper, a pseudo-alloy of tungsten and copper, exhibits certain advantages in this extreme environment. Tungsten's high melting point, high hardness, and excellent radiation resistance allow it to withstand high temperatures and strong radiation. Copper, on the other hand, has excellent thermal conductivity, effectively conducting heat away from high-temperature areas. Therefore, tungsten copper can be used as a heat sink in nuclear fusion devices, helping to dissipate the enormous heat generated by nuclear fusion reactions.

[0003] The core generates a variety of radiation, including gamma rays and neutrons. Gamma rays and neutrons are particularly penetrating, and if not properly shielded, they can cause significant radiation damage to nearby objects and personnel. However, copper has poor shielding capabilities against both gamma rays and neutrons. While tungsten has good shielding capabilities against gamma rays, it has poor neutron shielding, making it inadequate for shielding against both gamma rays and neutrons. While research has explored doping tungsten-copper with rare earth oxides to create tungsten-based alloys with excellent mechanical properties, their neutron shielding capabilities have not been significantly improved, making them inadequate for meeting the heat flux loads and neutron shielding requirements of a tokamak.

[0004] Therefore, there is an urgent need to enhance the shielding ability of tungsten copper materials against neutron irradiation to avoid irradiation damage and improve the mechanical properties of tungsten copper materials.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a tungsten-copper based alloy material, a preparation method and application thereof, aiming to improve the shielding ability of the alloy against neutron irradiation and improve the mechanical properties of the tungsten-copper material.

[0007] The present invention is achieved in that:

[0008] In a first aspect, the present invention provides a tungsten-copper based alloy material, comprising a tungsten-copper material in which an additive is dispersed, the additive being selected from at least one of lanthanum hexaboride and yttrium hexaboride.

[0009] In an optional embodiment, in the tungsten-copper based alloy material, the content of the additive is 0.5wt%-5.0wt%, the content of copper is 5wt%-16.5wt%, and the content of tungsten is 78.5wt%-94.5wt%;

[0010] Preferably, in the tungsten-copper based alloy material, the content of the additive is 0.8 wt%-3 wt%, the content of copper is 7.5 wt%-14 wt%, and the content of tungsten is 83 wt%-91.7 wt%.

[0011] In a second aspect, the present invention provides a method for preparing the tungsten-copper-based alloy material according to any one of the aforementioned embodiments, comprising: mixing an additive and a tungsten source and pressing to obtain a compact;

[0012] The compact is sintered to obtain a tungsten skeleton;

[0013] The tungsten skeleton is subjected to copper infiltration treatment.

[0014] In an optional embodiment, the tungsten source is tungsten powder, and the process of preparing the compact includes: mixing the additive and the tungsten powder, and then pressing using a cold isostatic press;

[0015] Preferably, the additive and tungsten powder are mixed in a ball mill or a V-type mixer for 24 hours to 72 hours.

[0016] In an optional embodiment, the tungsten source is ammonium paratungstate, and the process of preparing the compact comprises: mixing the additive and ammonium paratungstate and spray drying the mixture, then sintering and reducing the mixture in a reducing atmosphere to obtain a mixed powder, and pressing the mixed powder using a cold isostatic press;

[0017] Preferably, the sintering reduction process is carried out in a hydrogen atmosphere, and the sintering temperature is controlled to be 900°C-1000°C.

[0018] In an optional embodiment, during the pressing process, the pressing force is controlled to be 180 MPa-250 MPa, and the holding time is 90 s-180 s.

[0019] In an optional embodiment, during the sintering of the green compact, the sintering temperature is controlled to be 1800° C.-2150° C., and the holding time is 3 h-8 h.

[0020] In an optional embodiment, the process of copper infiltration of the tungsten skeleton includes: placing the tungsten skeleton in a copper infiltration furnace filled with pure copper, and keeping the temperature at 1400° C.-1600° C. for 0.5 h-2.0 h.

[0021] In an optional embodiment, the method further comprises: mechanically processing the alloy obtained after the copper infiltration treatment to obtain the desired product.

[0022] In a third aspect, the present invention provides a use of the tungsten-copper-based alloy material according to any one of the aforementioned embodiments or the tungsten-copper-based alloy material prepared by the preparation method according to any one of the aforementioned embodiments in preparing a heat dissipation device.

[0023] The present invention has the following beneficial effects: by introducing lanthanum hexaboride and / or yttrium hexaboride as additives into tungsten copper material, the present invention utilizes the shielding ability of the boron element against neutron irradiation to avoid tungsten copper material from being damaged by irradiation; at the same time, lanthanum hexaboride or yttrium hexaboride has stable properties and a particle reinforcement effect, thereby further improving the mechanical properties of the tungsten copper material. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is an SEM fracture photo of a tungsten skeleton containing 1 wt% lanthanum hexaboride;

[0026] Figure 2 This is a SEM fracture photo of a tungsten-copper alloy containing 1 wt% lanthanum hexaboride;

[0027] Figure 3 This is a SEM fracture photo of a tungsten skeleton containing 0.5 wt% lanthanum hexaboride;

[0028] Figure 4 This is an SEM fracture photo of a tungsten-copper alloy containing 0.5 wt% lanthanum hexaboride. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer are used. Where the manufacturer of the reagents or instruments is not specified, all are conventional products that can be purchased commercially.

[0030] As an excellent thermal conductive material, tungsten copper plays an irreplaceable role in nuclear fusion and other heat conduction and heat dissipation fields. As an excellent material for radiation shielding, tungsten has a radiation shielding capacity that is three times that of lead. The density of tungsten is 19.3g / cm 3 The density of tungsten gives it a significant advantage in the field of shielding, and it can effectively shield various radiations, including gamma rays. However, tungsten copper has poor neutron shielding capabilities.

[0031] In view of this, the present invention develops a tungsten-copper based alloy material to significantly improve the neutron shielding capability of tungsten-copper material while ensuring its mechanical properties.

[0032] An embodiment of the present invention provides a tungsten-copper-based alloy material, which includes a tungsten-copper material in which an additive is dispersed. The additive is selected from at least one of lanthanum hexaboride and yttrium hexaboride, and the additive can be any one or more of the above.

[0033] It should be noted that by introducing specific additives into the tungsten-copper material, particle dispersion strengthening is beneficial to the refinement of tungsten grains in the tungsten-copper material, which can enhance the toughness of the tungsten-copper material, reduce the ductile-brittle transition temperature, and improve its shielding ability against neutron irradiation. The tungsten-copper-based alloy material provided in the embodiments of the present invention can be further prepared into a heat sink, such as a heat sink for a nuclear fusion device, which can extend the service life of the tungsten-copper heat sink in a tokamak device.

[0034] In some embodiments, in a tungsten-copper-based alloy material, the content of the additive is 0.5wt%-5.0wt%, the content of copper is 5wt%-16.5wt%, and the content of tungsten is 78.5%-94.5wt%. By regulating the content of the additive, tungsten, and copper within the above ranges, the shielding ability of the material against neutron irradiation is further improved while ensuring the mechanical properties of the material. Specifically, in a tungsten-copper-based alloy material, the content of the additive can be 0.5wt%, 0.8wt%, 1.0wt%, 2.0wt%, 3.0wt%, 4.0wt%, 5.0wt%, etc.; the content of copper can be 5%, 7.5%, 10%, 13%, 16.5%, etc.; the content of tungsten can be 78.5%, 85%, 89%, 92%, 94.5%, etc.

[0035] In a preferred embodiment, the tungsten-copper alloy material comprises 0.8-3% by weight of the additive, 7.5-14% by weight of copper, and 83-91.7% by weight of tungsten. By further optimizing the content of each component, the material's shielding capability against neutron radiation can be further improved.

[0036] The present invention also provides a method for preparing a tungsten-copper alloy material, which comprises the following steps:

[0037] S1, powder mixing and pressing

[0038] The additive and tungsten source are mixed and pressed to prepare a compact for use. The preparation process varies depending on the tungsten source.

[0039] In some embodiments, when the tungsten source is tungsten powder, the process for preparing the compact includes mixing the additive and the tungsten powder, followed by pressing using a cold isostatic press. The mixing method is not limited, and can include mechanical mixing using a high-energy ball mill or a resin ball mill with a high ball-to-material ratio, or mixing using a V-type mixer. The mixing time can be 24-72 hours, such as 24 hours, 30 hours, 40 hours, 50 hours, 60 hours, 70 hours, or 72 hours.

[0040] In some embodiments, when the tungsten source is ammonium paratungstate, the process for preparing a compact includes: mixing the additive and ammonium paratungstate, spray drying the mixture, sintering and reducing the mixture in a reducing atmosphere to obtain a mixed powder, and pressing the mixed powder using a cold isostatic press. The ammonium paratungstate forms a dry mixed powder after spray drying, and then undergoes reduction and sintering to obtain tungsten powder doped with the additive. Specifically, the spray drying process involves dissolving the additive and ammonium paratungstate in water and then spray drying the mixture to form the mixed powder.

[0041] The sintering reduction process can be carried out in a hydrogen atmosphere, and the sintering temperature is controlled to be 900° C.-1000° C. to fully reduce the tungsten oxide.

[0042] Furthermore, when the tungsten source is tungsten powder or ammonium paratungstate, a cold isostatic press is used for pressing.

[0043] During the pressing process, the pressing force is controlled to be 180 MPa-250 MPa, and the holding time is 90 seconds-180 seconds, so that a block compact with a certain strength is obtained after pressing. Specifically, the pressing force can be 180 MPa, 200 MPa, 220 MPa, 250 MPa, etc., and the holding time can be 90 seconds, 100 seconds, 120 seconds, 150 seconds, 180 seconds, etc.

[0044] S2. Sintering

[0045] The compact is sintered to obtain a non-dense tungsten skeleton having a porosity of 10% to 30%, which is convenient for subsequent copper infiltration treatment.

[0046] In some embodiments, during the sintering of the compact, the sintering temperature is controlled to be between 1800°C and 2150°C, and the holding time is between 3 and 8 hours. By regulating the sintering temperature and time, a tungsten skeleton having a porosity of 10% to 30% is formed. Specifically, a medium frequency sintering furnace can be used for sintering, and the sintering temperature can be 1800°C, 1900°C, 2000°C, 2100°C, 2150°C, etc.; the holding time can be 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, etc.

[0047] S3, copper infiltration

[0048] The tungsten skeleton is subjected to copper infiltration treatment to introduce a preset content of copper into the tungsten skeleton. Specifically, the tungsten skeleton with a porosity of 10-30% obtained in step S2 is subjected to a high-temperature copper infiltration process to obtain a tungsten-copper material.

[0049] In some embodiments, the process of copper infiltration of the tungsten skeleton includes placing the tungsten skeleton in a copper infiltration furnace filled with pure copper and maintaining the temperature at 1400°C-1600°C for 0.5-2.0 hours to allow the copper to fully infiltrate the pores. Specifically, the operating temperature of the copper infiltration treatment can be 1400°C, 1450°C, 1500°C, 1550°C, 1600°C, etc., and the holding time can be 0.5 hours, 1.0 hours, 1.5 hours, 2.0 hours, etc. The copper material in the copper infiltration furnace can be commercially available pure copper with a purity of greater than or equal to 99.9%.

[0050] Specifically, a copper infiltration furnace is a specialized device used for copper infiltration of powder metallurgy products. Copper infiltration is a process that infiltrates liquid copper into porous materials (usually tungsten-, iron-, or steel-based powder metallurgy products) to improve their density, strength, thermal conductivity, and corrosion resistance.

[0051] S4, machining

[0052] The copper-infiltrated alloy is then mechanically processed to produce a product of the desired shape. Specifically, the shape and size of the tungsten-copper alloy are designed based on the intended use, and the product is mechanically processed to obtain the desired shape and size.

[0053] It should be noted that the amounts of tungsten source, additives, and pure copper are adjusted according to the predetermined alloy material composition, so that the contents of tungsten, copper, and additives meet the composition requirements of the tungsten-copper alloy material. Pure copper is a commercially available material with a copper content of greater than or equal to 99.9 wt%.

[0054] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0055] Example 1

[0056] This embodiment provides a method for preparing a tungsten-copper based alloy material, and the steps are as follows:

[0057] (1) Powder mixing and pressing: Lanthanum hexaboride and tungsten powder are mixed in a weight ratio of 1:4. The lanthanum hexaboride particle size is 0.5 μm, and the tungsten powder particle size is 6.5 μm. The mixed powders are placed in a ball mill with a ball-to-material ratio of 10:1. The ball mill is then milled at 50 rpm for 48 hours. The milled material is then poured into a V-type powder mixer. Tungsten powder of the same particle size is then added until the mass of the lanthanum hexaboride is 1.12% of the total mass of the lanthanum hexaboride and tungsten powder.

[0058] (2) Pressing: The mixed tungsten powder doped with lanthanum hexaboride is placed in a cold isostatic pressing mold with an inner cavity size of 110*150*400mm. The rubber mold is then locked after mechanical vibration. The mold filled with materials is placed in a cold isostatic press for pressing with a pressing force of 200MPa and a holding pressure of 180s. After demolding, a 100*130*180mm compact is obtained.

[0059] (3) Sintering: The compact is placed in a medium frequency induction furnace for sintering in a hydrogen atmosphere at a sintering temperature of 1850°C for 6 hours.

[0060] (4) Copper infiltration: The sintered tungsten skeleton is placed in a copper infiltration furnace filled with pure copper for copper infiltration at a temperature of 1500°C for 1 hour. The mass ratio of the sintered tungsten skeleton to copper is approximately 89:11.

[0061] (5) Mechanical processing of the copper-infiltrated alloy.

[0062] It should be added that, in the tungsten-copper based alloy material prepared in Example 1, the mass fraction of copper is 11%, the mass fraction of tungsten is 88%, and the mass fraction of the additive is 1%.

[0063] Figure 1 This is a SEM fracture photo of a tungsten skeleton containing 1 wt% lanthanum hexaboride. Figure 2 This is a SEM fracture photo of a tungsten-copper alloy containing 1 wt% lanthanum hexaboride. It can be seen that the tungsten skeleton with 1 wt% lanthanum hexaboride is well infiltrated with copper and has no pores.

[0064] Example 2

[0065] This embodiment provides a method for preparing a tungsten-copper based alloy material, and the steps are as follows:

[0066] (1) Powder mixing: Lanthanum hexaboride and tungsten powder are mixed in a weight ratio of 1:2, with a lanthanum hexaboride particle size of 1 μm and a tungsten powder particle size of 10 μm. The mixed powders are placed in a high-energy ball mill with a ball-to-material ratio of 10:1. The mill is evacuated and filled with argon gas. The milled material is ball milled at a speed of 200 rpm for 48 hours. The milled material is poured into a V-type powder mixer and tungsten powder of the same particle size is continuously added until the mass of the lanthanum hexaboride is 0.55% of the total mass of the lanthanum hexaboride and tungsten powder.

[0067] (2) Pressing: The mixed lanthanum hexaboride-doped tungsten powder is placed in a cold isostatic pressing mold with an inner cavity size of 110*150*400mm. The rubber mold is then locked after mechanical vibration. The mold filled with materials is placed in a cold isostatic press for pressing with a pressing force of 200MPa and a holding pressure of 180s. After demolding, a 100*130*180mm compact is obtained.

[0068] (3) Sintering: The compact is placed in a medium frequency induction furnace for sintering under a hydrogen atmosphere at a sintering temperature of 2050°C for 6 hours.

[0069] (4) Copper infiltration: Place the sintered tungsten skeleton into a copper infiltration furnace filled with pure copper for copper infiltration at a temperature of 1500°C for 1 hour. The mass ratio of the sintered tungsten skeleton to the copper material is 84:16.

[0070] (5) Mechanical processing of the copper-infiltrated alloy.

[0071] It should be added that, in the tungsten-copper based alloy material prepared in Example 2, the mass fraction of copper is 16%, the mass fraction of tungsten is 83.5%, and the mass fraction of the additive is 0.5%.

[0072] Figure 3 This is a SEM fracture photo of a tungsten skeleton containing 0.5wt% lanthanum hexaboride. Figure 4 This is a SEM fracture photo of a tungsten-copper alloy containing 0.5 wt% lanthanum hexaboride. It can be seen that the tungsten skeleton with 0.5 wt% lanthanum hexaboride is well infiltrated with copper and has no pores.

[0073] Example 3

[0074] This embodiment provides a method for preparing a tungsten-copper based alloy material, and the steps are as follows:

[0075] (1) Powder mixing: ammonium paratungstate and lanthanum hexaboride were mixed in a ratio such that the tungsten content after reduction was 94.56%, and deionized water was added to obtain a solid-liquid weight ratio of 4:1. The mixed materials were placed in a ball mill with a ball-to-material ratio of 3:1. The mixture was ball milled at a speed of 50 rpm for 24 hours.

[0076] (2) Spray drying: The ball-milled slurry is spray-granulated with an inlet temperature of 280-300°C, an outlet temperature of 120-140°C, a spray rate of 5 L / h, and an atomizing disk speed of 2000 rpm.

[0077] (3) Reduction: The sprayed powder is placed in a clean molybdenum boat and placed in a hydrogen reduction furnace for reduction treatment. The atmosphere is hydrogen, the hydrogen flow rate is 3-5 L / min, the maximum temperature is 900-1000°C, and the boat pushing speed is 15 min / boat to prepare tungsten powder doped with lanthanum hexaboride.

[0078] (4) Pressing: The tungsten powder doped with lanthanum hexaboride is loaded into a cold isostatic pressing mold. The inner cavity size of the rubber mold is 100*150*400mm, and then the rubber mold is locked after mechanical vibration. The mold filled with the material is placed in a cold isostatic press for pressing with a pressing force of 200MPa and a holding pressure of 180s. After demolding, a 110*130*180mm compact is obtained.

[0079] (5) Sintering: The compact is placed in a medium frequency induction furnace for sintering under a hydrogen atmosphere at a sintering temperature of 1950°C for 6 hours.

[0080] (6) Copper infiltration: Place the sintered tungsten skeleton into a copper infiltration furnace filled with pure copper for copper infiltration at 1500°C for 1 hour. The mass ratio of the sintered tungsten skeleton to the copper material is 90:10.

[0081] (7) Mechanical processing of the copper-infiltrated alloy.

[0082] It should be added that, in the tungsten-copper based alloy material prepared in Example 3, the mass fraction of copper is 10%, the mass fraction of tungsten is 85%, and the mass fraction of the additive is 5%.

[0083] Example 4

[0084] The only difference between this embodiment and embodiment 1 is that the additive lanthanum hexaboride is replaced with an equal mass of yttrium hexaboride.

[0085] Comparative Example 1

[0086] The only difference from Example 1 is that the additive lanthanum hexaboride is not added.

[0087] Comparative Example 2

[0088] The only difference from Example 3 is that by adjusting the total mass ratio of lanthanum hexaboride to tungsten powder, the mass fraction of copper in the prepared tungsten-copper based alloy material is 10%, the mass fraction of tungsten is 84%, and the mass fraction of lanthanum hexaboride is 6wt%.

[0089] Comparative Example 3

[0090] The only difference from Example 3 is that yttrium hexaboride is used instead of lanthanum hexaboride, and by adjusting the total mass ratio of yttrium hexaboride to tungsten powder, the mass fraction of copper in the prepared tungsten-copper based alloy material is 10%, the mass fraction of tungsten is 84%, and the mass fraction of yttrium hexaboride is 6wt%.

[0091] Test example

[0092] (1) The metallographic diagram of the tungsten-copper alloy material prepared in Example 1 was tested. The results are as follows: Figure 1 As shown in Figure 2, it can be seen that the average grain size is between 10 and 15 μm.

[0093] (2) The neutron shielding coefficients of the tungsten-copper based alloy materials prepared in Example 1 and Comparative Example 1 were tested. The results are shown in Table 1.

[0094] Neutron shielding capability test method: Beijing Radiation Application Research Center Enterprise Standard "Q / CYSXY 001-2016".

[0095] Table 1 Neutron shielding ability test results of tungsten-copper alloy materials

[0096] Group Neutron transmittance Example 1 21.08％ Example 4 22.3％ Comparative Example 1 32.9％

[0097] (3) The thermal conductivity and hardness of the tungsten-copper based alloy materials prepared in the examples and comparative examples were tested. The results are shown in Table 2.

[0098] Thermal conductivity test method: GB / T 22588-2008 "Flash method for measurement of thermal diffusivity or thermal conductivity".

[0099] Hardness measurement method: GB / T4340 "Vickers hardness test for metallic materials".

[0100] Table 2 Thermal conductivity and hardness test results of tungsten-copper based alloy materials

[0101]

[0102] As can be seen from Table 1, compared with the tungsten-copper based alloy material in Comparative Example 1 in which lanthanum hexaboride is not added, the neutron transmittance of the tungsten-copper based alloy material is significantly reduced after lanthanum hexaboride and yttrium hexaboride are added in Example 1 and Example 4, respectively. This indicates that the neutron shielding performance of the tungsten-copper based alloy material can be significantly improved by adding lanthanum hexaboride and yttrium hexaboride.

[0103] It can be seen from Table 2 that the tungsten-copper based alloy materials prepared in Examples 1 to 4 can take into account both thermal conductivity and hardness, and can meet the requirements of heat flux load and neutron irradiation shielding in the tokamak device.

[0104] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tungsten-copper based alloy material, characterized in that: The invention comprises a tungsten copper material, in which an additive is dispersed. The additive is selected from at least one of lanthanum hexaboride and yttrium hexaboride.

2. The tungsten-copper based alloy material according to claim 1, characterized in that: In the tungsten-copper based alloy material, the content of the additive is 0.5wt%-5.0wt%, the content of copper is 5wt%-16.5wt%, and the content of tungsten is 78.5%-94.5wt%; Preferably, in the tungsten-copper based alloy material, the content of the additive is 0.8 wt%-3 wt%, the content of copper is 7.5 wt%-14 wt%, and the content of tungsten is 83 wt%-91.7 wt%.

3. A method for preparing the tungsten-copper based alloy material according to any one of claims 1-2, characterized in that: include: mixing the additive and the tungsten source and pressing to obtain a compact; Sintering the compact to obtain a tungsten skeleton, wherein the porosity of the tungsten skeleton is 10%-30%; The tungsten skeleton is subjected to copper infiltration treatment.

4. The preparation method according to claim 3, characterized in that The tungsten source is tungsten powder, and the process of preparing the compact includes: mixing the additive and tungsten powder, and then pressing using a cold isostatic press; Preferably, the additive and tungsten powder are mixed using a ball mill or a V-type mixer for 24 hours to 72 hours.

5. The preparation method according to claim 3, characterized in that The tungsten source is ammonium paratungstate, and the process of preparing the compact comprises: mixing the additive and ammonium paratungstate and spray drying the mixture, then sintering and reducing the mixture in a reducing atmosphere to obtain a mixed powder, and pressing the mixed powder using a cold isostatic press; Preferably, the sintering reduction process is carried out in a hydrogen atmosphere, and the sintering temperature is controlled to be 900°C-1000°C.

6. The preparation method according to claim 4 or 5, characterized in that During the pressing process, the pressing force is controlled to be 180MPa-250MPa, and the holding time is 90s-180s.

7. The preparation method according to claim 3, characterized in that During the sintering process of the compact, the sintering temperature is controlled to be 1800° C.-2150° C., and the holding time is 3 h-8 h.

8. The preparation method according to claim 3, characterized in that The process of copper infiltration treatment of the tungsten skeleton comprises: placing the tungsten skeleton into a copper infiltration furnace filled with pure copper, and keeping the temperature at 1400° C.-1600° C. for 0.5 h-2.0 h.

9. The preparation method according to claim 3, characterized in that Also includes: The alloy obtained after copper infiltration is mechanically processed.

10. Use of the tungsten-copper based alloy material according to any one of claims 1 to 2 or the tungsten-copper based alloy material prepared by the preparation method according to any one of claims 3 to 9 in preparing a heat dissipation device.

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