A short process preparation technology of ultrasonic consolidation plus electric heating plus upsetting composite material

Abstract

The application discloses a short-process preparation process of an ultrasonic consolidation and electric heating upsetting composite material, and comprises the following steps: S1, selecting material A as a reinforcing phase of the composite material, mixing and stirring the specific material A with an ethanol solution, brushing the suspension on a copper foil, and placing the copper foil on an ultrasonic device after the ethanol is completely evaporated; S2, starting ultrasonic consolidation by using the ultrasonic device power supply; S3, brushing one layer of the material A on one layer of the copper foil, and repeatedly performing the steps S1-S2 until the layer number of the composite material is consolidated to a preset height; and S4, placing the ultrasonic consolidated composite material in the middle of a pulse current electrode, then placing the composite material and the pulse current electrode on a C-shaped hydraulic machine workbench together, and repeatedly heating and upsetting. The prepared composite material has a flat and consistent appearance, a compact combined effect is obtained, the reinforcing phase is completely wetted with the matrix, and poor connection rarely occurs.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of composite material preparation, and particularly relates to a short-process preparation process of ultrasonic consolidation plus electric heating upsetting composite material. BACKGROUND

[0002] Metal matrix composites (MMCs) are composites artificially combined with one or more metal or non-metal reinforcing phases and metal and its alloy as a matrix. Metal matrix composites are classified according to the types of reinforcing phases, such as fiber reinforcement (including continuous and chopped), whisker reinforcement and particle reinforcement, etc. According to different metal or alloy matrices, metal matrix composites can be divided into aluminum-based, magnesium-based, copper-based, titanium-based, high-temperature alloy-based, intermetallic compound-based and refractory metal-based composites, etc. At present, the commonly used processes for preparing metal matrix composites include solid-state method, liquid-state method, spray forming method and in-situ growth method, etc. The solid-state method needs to be carried out at low temperature and high pressure, and the temperature is not easy to control and the interface reaction is not serious; the liquid-state method needs to be pressurized under vacuum, and the process is complex, the cycle is long, and large-scale equipment is required for preparing large-size parts; the spray forming method has a complex solidification process, and the premature solidification is not difficult to compound, and the late solidification causes the reinforcing phase to float and sink and be unevenly distributed; the in-situ growth method needs to strictly control the temperature and growth parameters for the growth of crystals. Based on the above, the processing technology is optimized and improved on the basis of the prior art, the performance is stable, the process is simplified, the cost is lower, and the commercialization is more favorable. SUMMARY

[0003] Based on the above problems, the application uses carbon nanotubes and other materials with good mechanical, electrical and chemical properties as reinforcing phases, copper-based as the basic phase (matrix) of the composite material, and ultrasonic film breaking consolidation plus pulse current electric heating upsetting to composite copper and carbon nanotubes, and the technical scheme is as follows:

[0004] A short-process preparation process of ultrasonic consolidation plus electric heating upsetting composite material, comprising the following steps:

[0005] S1. Select a specific material A as a reinforcing phase of a composite material, mix and stir the specific material A with an ethanol solution, brush the mixed solution on a copper-based foil, and then place it on an ultrasonic device after the alcohol is completely evaporated;

[0006] S2. Start ultrasonic consolidation using the ultrasonic device power supply;

[0007] S3. Brush a layer of copper foil on a layer of specific material A, and repeat steps S1-S2 until the number of layers of the composite material increases to a preset height;

[0008] S4. The ultrasonic consolidated composite material is placed between the two electrode plates of the pulse current heating device, and then the composite material and the electrode plates are placed together on the workbench of the C-type hydraulic machine for heating and piling.

[0009] Further, the specific material A is any one of carbon nanotubes, graphene, carbon fibers, diamond, and boron fibers.

[0010] Further, in step S1, the configuration ratio of the specific material A to the ethanol solution is 1-10 mg:100 ml, and the thickness of the copper-based foil is 0.05-0.3 mm.

[0011] Further, in step S2, the ultrasonic amplitude of the ultrasonic device is 10-50 um, and the pressure is 0.1-0.5 MPa.

[0012] Further, in step S3, the preset height of the layer of the composite material is 0.5-10 mm, including the layer of the specific material A and the multiple layers of the copper foil.

[0013] Further, in step S4, the pulse current heating device includes a pulse current electrode and a tungsten-copper alloy plate, and an insulating material is arranged between the two. A plurality of irregular and interconnected S-shaped water channels are arranged on the pulse current electrode and the tungsten-copper alloy plate. The S-shaped water channels are connected to a cold water treatment machine, and the pulse current electrode is connected to a pulse power supply. The pulse current electrode has a voltage of 10V-80V, a frequency of 100Hz-250Hz, a pressure of 1-10Mpa, and a duty cycle of 0.05-0.5. The pulse current electrode has a heating time of 600s and a heating temperature of 900-1300K.

[0014] Further, in step S4, the pressure of the C-type hydraulic machine is adjustable in the range of 1-10MPa, and the piling time is 10s at a time, and the piling is continuously performed for 5 times, so that the reinforcing phase and the copper-based foil are highly wetted.

[0015] Beneficial effects

[0016] 1. The pulse power supply is connected to the electrode, the electrode generates heat to heat the composite material, and the metal of each layer is combined with the reinforcing phase more tightly. The pulse power supply can reach the required temperature at the moment of connection, and the temperature can reach room temperature instantly when the voltage is not applied to the electrode. At the same time, through the piling of the C-type hydraulic machine, the appearance of the prepared material is flat and consistent, and there is little connection failure.

[0017] 2. The entire electrode and the composite material are placed in the C-type hydraulic machine to make the composite material pulse multiple times, so as to obtain the effect of dense combination, so that the reinforcing phase and the matrix are completely wetted, and the tensile strength is improved by 30%. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a schematic diagram of carbon nanotubes and copper foil.

[0019] Figure 2 Fig. 2 is a schematic diagram of ultrasonic consolidation.

[0020] Figure 3 Fig. 3 is a front view of a pulsed current electrode heating and upsetting.

[0021] Figure 4 Fig. 4 is a side view of a pulsed current electrode heating and upsetting.

[0022] Figure 5 Fig. 5 is a schematic diagram of a tungsten-copper alloy plate structure.

[0023] Fig. 1 is a copper-based foil, 2 is a carbon nanotube, 3 is an ultrasonic workbench of an ultrasonic device, 4 is a material to be ultrasonically compounded, 5 is an ultrasonic pressure head of an ultrasonic device, 6 is a C-type hydraulic machine, 7 is a cooling water device, 8 is a pulse power supply, 801 is a hydraulic column, 802 is a hydraulic machine workbench, 9 is a pulsed current heating device, 901 is a pulsed current electrode, 902 is an insulating material, 903 is a tungsten-copper alloy, and 904 is an S-type water tank. DETAILED DESCRIPTION

[0024] The following detailed description is exemplary in nature and provided to provide further explanation of the application as claimed. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.

[0025] An ultrasonic consolidation and pulsed current heating upsetting short process preparation process for a composite material, comprising the following steps:

[0026] S1. Select a specific material A as a reinforcing phase of the composite material, mix and stir the specific material A with an ethanol solution, brush the mixed solution on a copper-based foil, and after the alcohol is completely evaporated, place it on an ultrasonic device (prior art);

[0027] The specific material A is any one of a carbon nanotube, graphene, carbon fiber, diamond, and boron fiber.

[0028] The configuration ratio of the specific material A selected from carbon nanotubes to the ethanol solution is 1-10 mg: 100 ml (preferably 4 mg: 100 ml);The configuration ratio of the specific material A selected from graphene to the ethanol solution is 1-10 mg: 100 ml (preferably 5 mg: 100 ml);The configuration ratio of the specific material A selected from carbon fibers to the ethanol solution is 1-10 mg: 100 ml (preferably 5 mg: 100 ml);The configuration ratio of the specific material A selected from diamond to the ethanol solution is 1-10 mg: 100 ml (preferably 5 mg: 100 ml);The configuration ratio of the specific material A selected from boron fibers to the ethanol solution is 1-10 mg: 100 ml (preferably 5 mg: 100 ml);The thickness of the copper foil is 0.05-0.3 mm.

[0029] S2. Ultrasonic consolidation is carried out by using an ultrasonic equipment power supply;The ultrasonic amplitude of the ultrasonic equipment is 30 um, and the pressure is 0.1-0.5 MPa.

[0030] S3. One layer of copper foil is brushed with one layer of specific material A, and steps S1-S2 are repeatedly performed until the layer number of the composite material increases to a preset height;The preset height of the layer number of the composite material is 0.5-10 mm, preferably 7 mm, including the layer specific material A and the plurality of copper foils.

[0031] S4. The composite material after ultrasonic consolidation is placed between two electrode plates of a pulse current heating equipment, and then the composite material and the electrode plates are placed together on a C-type hydraulic machine workbench for heating and piling.

[0032] The pulse current heating equipment comprises a pulse current power electrode and a tungsten-copper alloy plate, and an insulating material is arranged between the two;A plurality of irregular and interconnected S-shaped water grooves are arranged on the pulse current power electrode and the tungsten-copper alloy plate, and the S-shaped water grooves are connected with a cold water treatment machine;The pulse current power electrode is connected with a pulse power supply;The voltage of the pulse current power electrode is 10V-80V, the frequency is 100Hz-250Hz, the pressure is 1-10Mpa, the duty cycle is 0.05-0.5, the heating time of the pulse current power electrode is 600s, and the heating temperature is 900-1300K.

[0033] In step S4, the pressure of the C-type hydraulic machine is 1-10Mpa, and the piling time is 10s at a time, and the piling is continuously performed for 5 times, so that the reinforcing phase and the copper foil are highly wetted.

[0034] Working principle

[0035] The present application uses carbon nanotubes as a reinforcing phase (not limited to carbon nanotubes, graphene, carbon fibers, diamond, and boron fibers can also be used) and metal copper as a matrix, places the carbon nanotubes on the copper foil, and then performs ultrasonic consolidation (such as ultrasonic consolidation in step S2) to form a composite material. Figure 2The ultrasonic can effectively break the oxide film on the surface of the copper foil to make the copper foil interface preliminary combination, and the carbon nanotubes are preformed into the foil connecting interface, then the multi-layer copper foil is ultrasonically consolidated, but the composite material consolidated only by ultrasonic cannot achieve complete wetting between atoms, the consolidated material is put into the pulse current electrode, and the whole electrode with the composite material is put into the C-type hydraulic machine to make the composite material conduct electricity again for multiple times to obtain the effect of dense combination, so that the reinforcing phase and the matrix are completely wetted, and the tensile strength is increased by 30%.

[0036] The pulse power supplies electricity to the pulse current electrode, the electrode generates heat to heat the composite material, the combination of each layer of metal and the reinforcing phase is more compact, the pulse current combination can reach the required temperature at the moment of electrification, and once the voltage is not applied to the electrode, the temperature can reach room temperature instantly, and the appearance of the prepared material is flat and consistent, and poor connection rarely occurs.

[0037] The above only describes the preferred process parameters of the application, and is not used to limit the application. For those skilled in the art, the application can have various modifications and changes of the reinforcing phase and the welding process parameters. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A short-process preparation process for ultrasonically consolidated and electrically heated upsetting composite materials, characterized in that, Includes the following steps: S1. Select a specific material A as the reinforcing phase of the composite material, mix and stir the specific material A with an ethanol solution, brush the mixture onto a copper-based foil, and place it on an ultrasonic device after the alcohol has completely evaporated; the specific material A is boron fiber, and the ratio of the specific material A to the ethanol solution is 1-10 mg: 100 ml. S2. Start ultrasonic consolidation using the power supply of the ultrasonic equipment; S3. Apply a layer of specific material A to a layer of copper foil, and repeat steps S1-S2 until the number of composite material layers increases to a preset height; the thickness of the copper base foil is 0.05mm; S4. Place the ultrasonically consolidated composite material between the two electrode plates of the pulse current heating device, and then place the composite material and the electrode plates together on the C-type hydraulic press worktable for heating and pressing. The pulse current energized electrode is connected to the pulse power supply; the voltage of the pulse current energized electrode is 10 V-80 V, the frequency is 100 Hz-250 Hz, the pressure is 1-10 MPa, and the duty cycle is 0.05-0.5; the heating time of the pulse current energized electrode is 600 s, and the heating temperature is 900-1300 K.

2. The short-process preparation process of ultrasonically consolidated and electrically heated upsetting composite material according to claim 1, characterized in that, The specific material A is any one of carbon nanotubes, graphene, carbon fiber, and diamond.

3. The short-process preparation process of ultrasonic consolidation and electrically heated upsetting composite material according to claim 1, characterized in that, In step S2, the ultrasonic amplitude of the ultrasonic device is 10-50 μm and the pressure is 0.1-0.5 MPa.

4. The short-process preparation process of ultrasonic consolidation and electrically heated upsetting composite material according to claim 1, characterized in that, In step S3, the preset height of the composite material layers is 0.5-10mm, including multiple layers of specific material A and multiple layers of copper foil.

5. The short-process preparation process of ultrasonically consolidated and electrically heated upsetting composite material according to claim 1, characterized in that, In step S4, the pulse current heating device includes a pulse current energizing electrode and a tungsten copper alloy plate, with an insulating material between them. Both the pulse current energizing electrode and the tungsten copper alloy plate are provided with multiple irregular and interconnected S-shaped water tanks, which are connected to a cold water treatment machine.

6. The short-process preparation process of ultrasonically consolidated and electrically heated upsetting composite material according to claim 1, characterized in that, In step S4, the pressure of the C-type hydraulic press is adjustable from 1 to 10 MPa, and the pressing time is 10 seconds per press. The pressing is performed 5 times in a row to make the reinforcing phase highly wetted with the copper base foil.

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