A kind of preparation method of copper-based composite material

A technology of copper-based composite materials and composite powders, which is applied in the field of composite materials, can solve problems such as insufficient density of bulk materials, difficult-to-wet interfacial reactions, and influence on thermal conductivity and electrical conductivity of materials, so as to improve the overall comprehensive performance and scope of application Wide and reliable operation

Active Publication Date: 2021-05-11
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the powder metallurgy method and casting method are the most widely used methods for preparing copper-based composite materials in industrial production. The powder metallurgy method generally includes processes such as powder mixing, pressing and sintering. The heat treatment between % is completed, resulting in the block material is not dense enough, which seriously affects the thermal conductivity and electrical conductivity of the material; in addition, in the casting process, due to the large difference in physical properties and geometric dimensions between the reinforcement and the copper melt, In addition, copper is usually difficult to wet and interfacially react with the reinforcing phase, so it is difficult to uniformly disperse the reinforcement into the copper matrix

Method used

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  • A kind of preparation method of copper-based composite material
  • A kind of preparation method of copper-based composite material
  • A kind of preparation method of copper-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Apparatus for preparing a copper-based composite material used in the present invention, such asfigure 1 As shown, including a hydraulic pump 1, a piston I2, a smelting furnace 3, a branch pipe I4, a reverse valve I5, a reverse valve II6, a vacuum valve 7, a piston II8, a pneumatic pump 9, a mold cavity 10, and a reverse valve III 11, Main pipe 12, branch pipe II13, scale 14, feed port 15, plurality of turbuler 16, thermal insulation layer, temperature sensor

[0031]The hydraulic pump 1 output is connected to one end of the piston I2, and the other end of the piston I2 is located in the main pipe 12, and the hydraulic pump 1 pushes the piston I2 to travel within the main pipe 12, the other end of the main pipe 12 and the mold cavity 10 inner Unicom, mold cavity 10 Internal entrance sets the stop countervalue III 11;

[0032]The main pipe 12 is connected to the branch pipe I3, a branch pipe II13, a branch pipe II 11, a branch pipeline II13 is closer to the piston I2, branch pipeline...

Embodiment 2

[0035]A method of preparing a copper-based composite, the apparatus of Example 1, the specific steps are as follows:

[0036](1) Treatment of carbon nanotubes to treat the carbon nanotube, immerse carbon nanotubes in a mass ratio g: ml of 1: 1, 38% concentrated in concentrated nitric acid, then lyophilized, then dispersed into aqueous solution , Ultrasonic stirring is obtained to obtain a carbon nanotube dispersion, and the mass concentration of the carbon nanotube dispersion is 5% by weight;

[0037](2) The carbon nanotube dispersion of step (1) is added to a mixed liquid, a mixed volume ratio of a mixed liquid, a carbon nanotube dispersion and a tungsten salt solution, a mixed volume ratio of a concentration of 0.01 mol / L. ;

[0038](3) After ultrasonic atomization of the mixture of step (2), the mixture of step (2) is performed into the spray hot solution, and the ultrasonic aerosol is 100 mL / h; the spray thermolyte temperature section includes a preheating section, heating section , ...

Embodiment 3

[0044]A method of preparing a copper-based composite, the apparatus of Example 1, the specific steps are as follows:

[0045](1) Treatment of carbon nanotubes to treat the carbon nanotube, immersed in concentrated mass fraction of 98% in concentrated sulfuric acid in a mass fraction of 1: 100, and then dispersed evenly after cryogenic acid. In the aqueous solution, ultrasound stirring to obtain a carbon nanotube dispersion, the mass concentration of the carbon nanotube dispersion is 0.1% by weight;

[0046](2) The carbon nanotube dispersion of step (1) is added to the ammonium concentration of 0.02 mol / L to obtain a mixed liquid, the mixed volume ratio of the carbon nanotube dispersion and the tungsten salt solution is 1: 100. ;

[0047](3) After ultrasonic atomization of the mixture of step (2), the mixture of step (2) is introduced into the spray hot solution, and the ultrasonic aerosol is 500 ml / h; the spray thermal solution temperature range includes a preheating section, a heating s...

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Abstract

The invention provides a preparation method of a copper-based composite material. After carbon nanomaterials are acidified and freeze-dried, they are uniformly dispersed in an aqueous solution and ultrasonically stirred to obtain a carbon nanomaterial dispersion; the carbon nanomaterial dispersion is added to a tungsten salt The mixed solution is obtained in the solution, and after ultrasonic atomization, it is passed into the spray pyrolysis furnace for decomposition and calcination to obtain the coated WO 3 The NCM composite powder of NCM composite powder is obtained by reducing the NCM composite powder coated with W, and mixed with copper or copper alloy after vacuum smelting for die-casting to prepare a copper-based composite material; this method solves the problem of the high porosity of traditional powder metallurgy materials. It is difficult to add and uniformly disperse reinforcements in the die-casting process. Taking the strengths of the two to complement the weaknesses of the two, the prepared copper-based composite material has the characteristics of high density, good electrical conductivity, and outstanding high-temperature stability, and is suitable for Industrialized mass production preparation.

Description

Technical field[0001]The present invention relates to a method of preparing a copper-based composite, belonging to the field of composite.Background technique[0002]Carbon nanomaterial / copper-based composites integrated copper good conductive, thermal conductivity, and high-grade strength and specific modulus, low thermal expansion coefficients, and high temperature stability and high temperature stability, making it good A series of advantages such as conductivity, high temperature resistance, high temperature resistance, arc ablation resistance, fusion welding and anti-aging, as a new type of functional material has been widely used as electronic component material, contact material , Heat exchange material, sliding material, lead frame material, etc., for manufacturing a brush, shaft tile, contact, slider, rail transit, electrical arch slide, integrated circuit heat dissipation plate, and rocket engine parts.[0003]At present, the powder metallurgy method and casting method in in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/02C22C9/00B22D17/20B22D17/14
CPCC22C1/101C22C1/1036C22C9/00C22C26/00B22D17/203B22D17/145C22C2026/002C22C1/1047C22C1/1073
Inventor 鲍瑞易健宏陶静梅杨旭杨红梅付志华
Owner KUNMING UNIV OF SCI & TECH
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