CN108165898A - A kind of preparation method of copper carbon nano-tube composite powder end enhancing magnesium cu-base amorphous alloy composite material - Google Patents

Abstract

The invention relates to a preparation method of a copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, which belongs to the technical field of metal alloy composite materials. In the present invention, copper acetate is dissolved in deionized water to obtain an aqueous solution of copper acetate, and a carbon nanotube dispersion is added and mixed uniformly to obtain a precursor solution; the precursor solution is subjected to a spray pyrolysis method to obtain Cu simple substance/carbon nanotube composite powder; Mg powder, Cu Powder, Y powder, Cu simple substance/carbon nanotube composite powder are mixed by low-energy ball milling to obtain copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder, which is then pressed into a block, and the block is placed at a temperature of 600~1000 ℃ induction die-casting furnace for 15-25s, and then die-casting under the condition of 1-10Mpa to obtain copper-carbon nanotube composite powder-reinforced magnesium-copper-based amorphous composite material. Compared with the pure Mg-based amorphous alloy, the magnesium-copper-based amorphous composite material prepared by the method of the invention has higher glass-forming ability.

Description

Preparation of a copper-carbon nanotube composite powder reinforced magnesium-copper matrix amorphous composite material method

technical field

The invention relates to a preparation method of a copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, which belongs to the technical field of metal alloy composite materials.

Background technique

Since carbon nanotubes (CNTs) were discovered by Japanese electron microscope expert Iijima in 1991, CNTs have rapidly become a hot spot in the field of scientific research due to their excellent performance. At a temperature below 973K, there is basically no change, and the high elastic modulus can reach 1.8 TPa; the strength is 100 times that of steel, and it has good deformation properties. Its elastic strain can reach 5%, which is about 60 times that of steel. times, and its density is only 1.35g/cm3, which is one-sixth of steel, and carbon nanotubes have better toughness than other fibers. Very high aspect ratio, generally 100-1000, up to 1000-10000. Because of the above characteristics, CNTs are expected to be used as the reinforcing phase of composite materials, and CNTs also have the advantages of small radius, large surface area, not easy to react with the metal matrix to form a brittle interface, high temperature resistance and corrosion resistance. Therefore, CNTs are expected to become the most promising reinforcement phase for composite materials.

Chinese patent CN102650027A discloses a thermal spray coating and method for preparing carbon nanotube-reinforced iron-based amorphous alloys. The method is to prepare Fe-based amorphous powder by gas atomization method, then mix it with carbon nanotubes, and carry out mechanical ball milling. Particles are reconstructed to obtain iron-based amorphous-carbon nanotube composite powder, and then the sprayed substrate is pretreated for thermal spraying. In this coating, carbon nanotubes are well combined with Fe-based amorphous powder, but Fe-based amorphous powder is prepared by gas atomization method. The increase gradually decreases. With the decrease of the powder particle size, the microstructure of the alloy powder changes, and finally a completely amorphous state of a specific particle size powder is obtained. It is difficult to control the appropriate fine powder rate in the atomization process, the control of the appropriate particle size is more complicated, and the transformation of the organizational structure is not easy to control.

Chinese patent CN104630662A discloses a carbon nanotube-reinforced magnesium-nickel-based amorphous composite material and its preparation method. The method is to prepare magnesium-nickel-based amorphous with an electric arc furnace, then mix it with carbon nanotubes, and perform particle reconstruction by mechanical ball milling , to obtain magnesium-nickel-based amorphous-carbon nanotube composite powder, and then die-cast to obtain magnesium-nickel-based bulk amorphous composite material reinforced by carbon nanotubes. The composite material has improved amorphous forming ability and improved strength and toughness. However, this method needs to prepare a master alloy first, then add metal Mg to prepare a master alloy, crush it and then ball mill it. The process is complex, tedious, time-consuming and labor-intensive.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a method for preparing a copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, by adding elemental Cu and carbon nanotube composite powder to the magnesium-copper-based amorphous alloy. Improve the glass-forming ability of magnesium-copper-based amorphous alloys to obtain amorphous composites with higher strength and toughness.

A method for preparing a copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, the specific steps are:

(1) Under stirring conditions, dissolve copper acetate in deionized water to obtain copper acetate aqueous solution, then add carbon nanotube dispersion liquid and mix uniformly to obtain precursor liquid; Cu simple substance/carbon nanotube composite powder was obtained by liquid spray pyrolysis;

(2) Grinding, ultrasonic cleaning, vacuum drying, and grinding metal Mg, Cu, and Y respectively to obtain Mg powder, Cu powder, and Y powder, and Mg powder, Cu powder, Y powder, Cu elemental/carbon nano Tube composite powder is mixed by low-energy ball milling to obtain copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder;

(3) Under the condition of a pressure of 0.5-1Mpa, press the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder obtained in step (2) into a block, and place the block at a temperature of 600-1000°C Melting in an induction die-casting furnace for 15-25 seconds, and then die-casting under a pressure of 1-10 Mpa to obtain a magnesium-copper-based amorphous composite material reinforced with copper-carbon nanotube composite powder;

The concentration of copper acetate aqueous solution in the step (1) is 4.938 g/L, the mass percent concentration of carbon nanotubes in the carbon nanotube dispersion is 10%, and the mass percent concentration of carbon nanotubes in the precursor solution is 0.013 ~ 0.068% .

In the step (1), the reducing gas is one or more of hydrogen, carbon monoxide, decomposed ammonia, hydrogen-inert gas, carbon monoxide-inert gas or decomposed ammonia-inert gas;

The carbon nanotubes in the step (1) are multi-walled carbon nanotubes with a purity ≥ 95%, an outer diameter of 20-60 nm, and a length of 0.5-15 μm;

The purity of Mg, Cu and Y raw materials in the step (2) is >99.9 (wt.%);

Copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material is (CNTs) _x (Mg ₆₅ Cu ₂₅ Y ₁₀ ) _100-x , where x is the volume percentage of carbon nanotubes, and x=1~5.

The spray pyrolysis method is to evacuate the furnace cavity, and then introduce a reducing gas until the furnace cavity does not contain oxygen, start heating until the temperature reaches the reaction temperature and is constant temperature, atomize the precursor solution through the atomizer, and then The atomized micron-sized droplets are driven by the reducing atmosphere into the heating chamber for drying, decomposition, and reduction reactions, and the powder collection system is opened to collect the reaction product, that is, the Cu element/carbon nanotube composite powder.

Beneficial effects of the present invention:

(1) The method of the present invention adopts the spray pyrolysis method to synthesize Cu simple substance/carbon nanotube composite powder, which can improve the interfacial bonding between carbon nanotubes and copper, and can avoid the non-wetting phenomenon of carbon nanotubes and copper in the direct ball milling process, Improve the strength of the bonding interface between carbon nanotubes and the matrix; because the powder particles stay in the high-temperature cavity for a very short time, it can effectively avoid secondary agglomeration and solve the problem of poor dispersion of carbon nanotubes during ball milling;

(2) The copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material prepared by the method of the present invention has higher glass-forming ability than the pure Mg-based amorphous alloy.

Description of drawings

Fig. 1 is the SEM picture of the Cu simple substance/carbon nanotube composite powder prepared in embodiment 2;

Fig. 2 is the microstructure figure of the magnesium-copper-based amorphous composite material reinforced by the copper-carbon nanotube composite powder prepared in Example 2 at 60,000 times;

Fig. 3 is a microstructure diagram of the copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material prepared in Example 2 at 240,000 times.

Detailed ways

The present invention will be described in further detail below in conjunction with specific embodiments, but the protection scope of the present invention is not limited to the content described.

Embodiment 1: A kind of preparation method of copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, the specific steps are:

(1) Under stirring conditions, dissolve copper acetate in deionized water to obtain a copper acetate aqueous solution, then add carbon nanotube dispersion liquid and mix uniformly to obtain a precursor liquid; at a temperature of 400°C and a reducing gas (hydrogen) atmosphere, The precursor liquid was obtained Cu simple substance/carbon nanotube composite powder by spray pyrolysis; wherein the concentration of copper acetate aqueous solution was 4.938g/L, the mass percentage concentration of carbon nanotubes in the carbon nanotube dispersion liquid was 10%, and the carbon nanotubes in the precursor liquid The mass percent concentration of nanotubes is 0.013%; carbon nanotubes are multi-walled carbon nanotubes with a purity of 95%, an outer diameter of 20-60 nm, and a length of 0.5-15 μm; the flow rate of reducing gas (hydrogen) is 100 mL/min The SEM figure of the Cu simple substance/carbon nanotube composite powder prepared by the present embodiment is as shown in Figure 1, as can be seen from Figure 1, the carbon nanotube surface is uniformly coated with one layer of simple substance copper, and the interface between the carbon nanotube and copper The combination is good, and no obvious agglomeration of carbon nanotubes is found;

(2) Grinding, ultrasonic cleaning, vacuum drying, and grinding metal Mg, Cu, and Y respectively to obtain Mg powder, Cu powder, and Y powder, and Mg powder, Cu powder, Y powder, Cu elemental/carbon nano The tube composite powder is mixed by low-energy ball milling to obtain copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder; the molar ratio of Mg powder, Cu powder, and Y powder is 65:20:10, and Cu powder and Cu simple substance/carbon nanotube The molar ratio of Cu in the composite powder is 20:5; in terms of mass percentage, the carbon nanotubes in the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder account for 1%;

(3) Under the condition of a pressure of 0.5Mpa, the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder obtained in step (2) is pressed into a block, and the block is placed in an induction die-casting furnace with a temperature of 600°C Melting in medium temperature for 25s, and then die-casting under the condition of 1Mpa, the Mg ₆₅ Cu ₂₅ Y ₁₀ magnesium copper-based amorphous composite material reinforced by copper-carbon nanotube composite powder can be obtained, that is, the composition is expressed as (CNTs) ₁ (Mg ₆₅ Cu ₂₅ Y ₁₀ ) ₉₉ , where x is the volume percentage of carbon nanotubes;

In this embodiment, the spray pyrolysis method is to evacuate the furnace chamber, and then introduce reducing gas (hydrogen) until the furnace chamber does not contain oxygen, start heating until the temperature reaches the reaction temperature and is constant temperature, and the precursor solution is carried out through the atomizer. Atomization, and then the atomized micron-sized droplets are driven by the reducing atmosphere into the heating furnace chamber for drying, decomposition reaction, and reduction reaction, and the powder collection system is opened to collect the reaction product, namely Cu elemental substance/carbon nanotube composite powder;

The thermal performance test results of this embodiment are shown in Table 1. It can be seen from Table 1 that at the same heating rate, compared with the pure Mg-based amorphous alloy, the composite material has a supercooled liquid phase interval of 49.89K, that is High glass forming ability.

Embodiment 2: A kind of preparation method of copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, the specific steps are:

(1) Under stirring conditions, dissolve copper acetate in deionized water to obtain a copper acetate aqueous solution, then add carbon nanotube dispersion liquid and mix uniformly to obtain a precursor liquid; at a temperature of 420 °C and a reducing gas (hydrogen) atmosphere, The precursor liquid was obtained Cu simple substance/carbon nanotube composite powder by spray pyrolysis; wherein the concentration of copper acetate aqueous solution was 4.938g/L, the mass percentage concentration of carbon nanotubes in the carbon nanotube dispersion liquid was 10%, and the carbon nanotubes in the precursor liquid The mass percent concentration of nanotubes is 0.027%; the carbon nanotubes are multi-walled carbon nanotubes with a purity of 95%, an outer diameter of 20-60 nm, and a length of 0.5-15 μm; the flow rate of reducing gas (hydrogen) is 100 mL/min ;

(2) Grinding, ultrasonic cleaning, vacuum drying, and grinding metal Mg, Cu, and Y respectively to obtain Mg powder, Cu powder, and Y powder, and Mg powder, Cu powder, Y powder, Cu elemental/carbon nano The tube composite powder is mixed by low-energy ball milling to obtain copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder; the molar ratio of Mg powder, Cu powder, and Y powder is 65:20:10, and Cu powder and Cu simple substance/carbon nanotube The molar ratio of Cu in the composite powder is 20:5; in terms of mass percentage, carbon nanotubes account for 2% in the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder;

(3) Under the condition of a pressure of 0.6Mpa, the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder obtained in step (2) is pressed into a block, and the block is placed in an induction die-casting furnace with a temperature of 700°C smelted for 21s, and then die-casted under the condition of 3Mpa to obtain the copper-carbon nanotube composite powder reinforced Mg ₆₅ Cu ₂₅ Y ₁₀ magnesium copper-based amorphous composite material, that is, the composition is expressed as (CNTs) ₂ (Mg ₆₅ Cu ₂₅ Y ₁₀ ) ₉₈ , wherein x is the volume percentage of carbon nanotubes;

In this embodiment, the spray pyrolysis method is to evacuate the furnace chamber, and then introduce reducing gas (hydrogen) until the furnace chamber does not contain oxygen, start heating until the temperature reaches the reaction temperature and is constant temperature, and the precursor solution is carried out through the atomizer. Atomization, and then the atomized micron-sized droplets are driven by the reducing atmosphere into the heating furnace chamber for drying, decomposition reaction, and reduction reaction, and the powder collection system is opened to collect the reaction product, namely Cu elemental substance/carbon nanotube composite powder;

The microstructure of the copper-carbon nanotube composite powder reinforced Mg ₆₅ Cu ₂₅ Y ₁₀ magnesium copper-based amorphous composite material prepared in this example at 60,000 times is shown in Figure 2, and the microstructure at 240,000 times is shown in Figure 3 It can be seen from Figure 2 and Figure 3 that the carbon nanotubes are well combined with the magnesium-copper-based amorphous, and they are evenly distributed in the matrix, and the strengthening effect is obvious;

The thermal performance test results of this embodiment are shown in Table 1. It can be seen from Table 1 that at the same heating rate, compared with the pure Mg-based amorphous alloy, the composite material has a supercooled liquid phase interval of 53.86K, that is High glass forming ability.

Embodiment 3: A kind of preparation method of copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, the specific steps are:

(1) Under stirring conditions, dissolve copper acetate in deionized water to obtain copper acetate aqueous solution, then add carbon nanotube dispersion and mix uniformly to obtain a precursor solution; at a temperature of 450°C and a reducing gas (hydrogen) atmosphere, The precursor liquid was obtained Cu simple substance/carbon nanotube composite powder by spray pyrolysis; wherein the concentration of copper acetate aqueous solution was 4.938g/L, the mass percentage concentration of carbon nanotubes in the carbon nanotube dispersion liquid was 10%, and the carbon nanotubes in the precursor liquid The mass percent concentration of nanotubes is 0.040%; carbon nanotubes are multi-walled carbon nanotubes with a purity of 95%, an outer diameter of 20-60 nm, and a length of 0.5-15 μm; the flow rate of reducing gas (hydrogen) is 100 mL/min ;

(2) Grinding, ultrasonic cleaning, vacuum drying, and grinding metal Mg, Cu, and Y respectively to obtain Mg powder, Cu powder, and Y powder, and Mg powder, Cu powder, Y powder, Cu elemental/carbon nano The tube composite powder is mixed by low-energy ball milling to obtain copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder; the molar ratio of Mg powder, Cu powder, and Y powder is 65:20:10, and Cu powder and Cu simple substance/carbon nanotube The molar ratio of Cu in the composite powder is 20:5; in terms of mass percentage, carbon nanotubes account for 3% in the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder;

(3) Under the condition of a pressure of 0.7Mpa, the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder obtained in step (2) is pressed into a block, and the block is placed in an induction die-casting furnace with a temperature of 800°C smelted for 20s, and then die-casted under the condition of 5Mpa to obtain the copper-carbon nanotube composite powder reinforced Mg ₆₅ Cu ₂₅ Y ₁₀ magnesium-copper-based amorphous composite material, that is, the composition is expressed as (CNTs) ₃ (Mg ₆₅ Cu ₂₅ Y ₁₀ ) ₉₇ , wherein x is the volume percentage of carbon nanotubes;

In this embodiment, the spray pyrolysis method is to evacuate the furnace chamber, and then introduce reducing gas (hydrogen) until the furnace chamber does not contain oxygen, start heating until the temperature reaches the reaction temperature and is constant temperature, and the precursor solution is carried out through the atomizer. Atomization, and then the atomized micron-sized droplets are driven by the reducing atmosphere into the heating furnace chamber for drying, decomposition reaction, and reduction reaction, and the powder collection system is opened to collect the reaction product, namely Cu elemental substance/carbon nanotube composite powder;

The thermal performance test results of this embodiment are shown in Table 1. It can be seen from Table 1 that at the same heating rate, compared with the pure Mg-based amorphous alloy, the composite material has a supercooled liquid phase interval of 52.53K, that is High glass forming ability.

Embodiment 4: A kind of preparation method of copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, the specific steps are:

(1) Under stirring conditions, dissolve copper acetate in deionized water to obtain a copper acetate aqueous solution, then add carbon nanotube dispersion liquid and mix uniformly to obtain a precursor liquid; at a temperature of 480°C and a reducing gas (hydrogen) atmosphere, The precursor liquid was obtained Cu simple substance/carbon nanotube composite powder by spray pyrolysis; wherein the concentration of copper acetate aqueous solution was 4.938g/L, the mass percentage concentration of carbon nanotubes in the carbon nanotube dispersion liquid was 10%, and the carbon nanotubes in the precursor liquid The mass percent concentration of nanotubes is 0.054%; carbon nanotubes are multi-walled carbon nanotubes with a purity of 95%, an outer diameter of 20-60 nm, and a length of 0.5-15 μm; the flow rate of reducing gas (hydrogen) is 100 mL/min ;

(2) Grinding, ultrasonic cleaning, vacuum drying, and grinding metal Mg, Cu, and Y respectively to obtain Mg powder, Cu powder, and Y powder, and Mg powder, Cu powder, Y powder, Cu elemental/carbon nano The tube composite powder is mixed by low-energy ball milling to obtain copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder; the molar ratio of Mg powder, Cu powder, and Y powder is 65:20:10, and Cu powder and Cu simple substance/carbon nanotube The molar ratio of Cu in the composite powder is 20:5; in terms of mass percentage, carbon nanotubes account for 4% in the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder;

(3) Under the condition of a pressure of 0.8Mpa, the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder obtained in step (2) is pressed into a block, and the block is placed in an induction die-casting furnace with a temperature of 900°C Melted in medium for 18s, and then die-casted under the condition of 8Mpa to obtain copper-carbon nanotube composite powder-reinforced Mg ₆₅ Cu ₂₅ Y ₁₀ magnesium-copper-based amorphous composite material, that is, the composition is expressed as (CNTs) ₄ (Mg ₆₅ Cu ₂₅ Y ₁₀ ) ₉₆ , where x is the volume percentage of carbon nanotubes;

In this embodiment, the spray pyrolysis method is to evacuate the furnace chamber, and then introduce reducing gas (hydrogen) until the furnace chamber does not contain oxygen, start heating until the temperature reaches the reaction temperature and is constant temperature, and the precursor solution is carried out through the atomizer. Atomization, and then the atomized micron-sized droplets are driven by the reducing atmosphere into the heating furnace chamber for drying, decomposition reaction, and reduction reaction, and the powder collection system is opened to collect the reaction product, namely Cu elemental substance/carbon nanotube composite powder;

The thermal performance test results of this embodiment are shown in Table 1. It can be seen from Table 1 that at the same heating rate, compared with the pure Mg-based amorphous alloy, the composite material has a supercooled liquid phase interval of 48.51K, that is High glass forming ability.

Example 5: A method for preparing a copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, the specific steps are:

(1) Under stirring conditions, dissolve copper acetate in deionized water to obtain a copper acetate aqueous solution, then add carbon nanotube dispersion liquid and mix uniformly to obtain a precursor liquid; at a temperature of 500°C and a reducing gas (hydrogen) atmosphere, Precursor solution obtains Cu simple substance/carbon nanotube composite powder through spray pyrolysis; Wherein the concentration of copper acetate aqueous solution is 4.938g/L, the mass percentage concentration of carbon nanotube in the carbon nanotube dispersion liquid is 10%, the carbon nanotube in the precursor solution The mass percent concentration of nanotubes is 0.068%; the carbon nanotubes are multi-walled carbon nanotubes with a purity of 95%, an outer diameter of 20-60 nm, and a length of 0.5-15 μm; the flow rate of reducing gas (hydrogen) is 100 mL/min ;

(2) Grinding, ultrasonic cleaning, vacuum drying, and grinding metal Mg, Cu, and Y respectively to obtain Mg powder, Cu powder, and Y powder, and Mg powder, Cu powder, Y powder, Cu elemental/carbon nano The tube composite powder is mixed by low-energy ball milling to obtain copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder; the molar ratio of Mg powder, Cu powder, and Y powder is 65:20:10, and Cu powder and Cu simple substance/carbon nanotube The molar ratio of Cu in the composite powder is 20:5; in terms of mass percentage, carbon nanotubes account for 5% in the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder;

(3) Under the condition of a pressure of 1Mpa, press the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder obtained in step (2) into a block, and place the block in an induction die-casting furnace with a temperature of 1000°C Melting for 15s, and then die-casting under the condition of 10Mpa, the copper-carbon nanotube composite powder reinforced Mg ₆₅ Cu ₂₅ Y ₁₀ magnesium copper-based amorphous composite material, that is, the composition is expressed as (CNTs) ₅ (Mg ₆₅ Cu ₂₅ Y ₁₀ ) ₉₅ , wherein x is the volume percentage of carbon nanotubes;

In this embodiment, the spray pyrolysis method is to evacuate the furnace chamber, and then introduce reducing gas (hydrogen) until the furnace chamber does not contain oxygen, start heating until the temperature reaches the reaction temperature and is constant temperature, and the precursor solution is carried out through the atomizer. Atomization, and then the atomized micron-sized droplets are driven by the reducing atmosphere into the heating furnace chamber for drying, decomposition reaction, and reduction reaction, and the powder collection system is opened to collect the reaction product, namely Cu elemental substance/carbon nanotube composite powder;

The thermal performance test result of the present embodiment is as shown in table 1,

Table 1 Performance test results of composite materials

It can be seen from Table 1 that at the same heating rate, compared with pure Mg-based amorphous alloys, the composite material has a supercooled liquid phase interval of 46.32K, that is, a higher glass-forming ability.

Claims (5)

1. A preparation method of copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material, characterized in that, the specific steps are: (1) Under stirring conditions, dissolve copper acetate in deionized water to obtain copper acetate aqueous solution, then add carbon nanotube dispersion liquid and mix uniformly to obtain precursor liquid; Cu simple substance/carbon nanotube composite powder was obtained by liquid spray pyrolysis; (2) Grinding, ultrasonic cleaning, vacuum drying, and grinding metal Mg, Cu, and Y respectively to obtain Mg powder, Cu powder, and Y powder, and Mg powder, Cu powder, Y powder, Cu elemental/carbon nano Tube composite powder is mixed by low-energy ball milling to obtain copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder; (3) Under the condition of a pressure of 0.5-1Mpa, press the copper-carbon nanotube composite powder-magnesium-copper-based amorphous composite powder obtained in step (2) into a block, and place the block at a temperature of 600-1000°C Melting in an induction die-casting furnace for 15-25s, and then die-casting under the condition of a pressure of 1-10Mpa to obtain a magnesium-copper-based amorphous composite material reinforced with copper-carbon nanotube composite powder. 2. The preparation method of copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material according to claim 1, characterized in that: the concentration of copper acetate aqueous solution in step (1) is 4.938g/L, and the carbon nanotubes are dispersed The mass percent concentration of carbon nanotubes in the solution is 10%, and the mass percent concentration of carbon nanotubes in the precursor solution is 0.013-0.068%. 3. The preparation method of copper-carbon nanotube composite powder reinforced magnesium-copper-based amorphous composite material according to claim 1, characterized in that: step (1) the reducing gas is hydrogen, carbon monoxide, decomposed ammonia, hydrogen-inert gas, One or more of carbon monoxide-inert gas or decomposed ammonia gas-inert gas. 4. The method for preparing copper-carbon nanotube composite powder-reinforced magnesium-copper-based amorphous composite material according to claim 1, characterized in that: in step (1), the carbon nanotubes are multi-walled carbon nanotubes with a purity of ≥95%, The outer diameter is 20-60 nm, and the length is 0.5-15 μm. 5. The preparation method of copper-carbon nanotube composite powder-reinforced magnesium-copper-based amorphous composite material according to claim 1, wherein the copper-carbon nanotube composite powder-reinforced magnesium-copper-based amorphous composite material is (CNTs) _x ( Mg ₆₅ Cu ₂₅ Y ₁₀ ) _100-x , where x is the volume percentage of carbon nanotubes, and x=1~5.