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High-strength and high-conductivity carbon nano tube strengthening copper-based composite material and preparing method thereof

A copper-based composite material and carbon nanotube technology are applied in the field of single-walled carbon nanotube-reinforced copper-based composite materials and their preparation, which can solve the problems of macroscopic comprehensive performance, mechanical properties, unsatisfactory thermal conductivity and electrical conductivity, etc. To the mechanical properties and electrical properties, the preparation process is simple and stable

Inactive Publication Date: 2015-10-21
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The purpose of the present invention is to solve the key technical problems of existing carbon nanotube-reinforced copper-based composite materials, especially the unsatisfactory mechanical properties, thermal conductivity and electrical conductivity. In order to overcome the above-mentioned carbon nanotube-reinforced copper-based composite materials The shortcomings of the process provide a practical, effective and controllable method for preparing single-walled carbon nanotube-reinforced copper-based composites, which improves the dispersion of single-walled carbon nanotubes in the metal matrix and the compatibility of single-walled carbon nanotubes with The interface bonding of the metal matrix controls the distribution and arrangement of single-walled carbon nanotubes in the copper matrix, making them oriented along the current direction, and further improving the thermal conductivity and electrical conductivity of the composite material

Method used

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  • High-strength and high-conductivity carbon nano tube strengthening copper-based composite material and preparing method thereof
  • High-strength and high-conductivity carbon nano tube strengthening copper-based composite material and preparing method thereof
  • High-strength and high-conductivity carbon nano tube strengthening copper-based composite material and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0053] 2.5 mL of nickel / copper-coated single-walled carbon nanotubes (such as figure 1 as shown, figure 1 It is a scanning electron microscope photo of nickel / copper-plated single-walled carbon nanotubes. It can be seen that the bimetallic coating on the surface of carbon nanotubes is relatively uniform and continuous, and the coated carbon nanotubes used have a large aspect ratio. ) was dissolved in 60mL of absolute ethanol, the average diameter of single-walled carbon nanotubes was 2-6nm, and the average length was 5-30um, and then 47.5mL of 200-mesh pure copper powder was added to the resulting solution, at a frequency of 59Hz and a power of 60W, Under the condition that the temperature of the water bath is 40°C, the water bath is ultrasonically combined with mechanical stirring until all the anhydrous ethanol is volatilized, and the evenly mixed powder is placed in a vacuum drying oven. ﹣2 Dry at MPa for 36 hours. Put the dried powder into a powder metallurgy mold, and u...

Embodiment 2

[0055] Dissolve 5mL of nickel-plated / copper single-walled carbon nanotubes in 60mL of absolute ethanol, the average diameter of single-walled carbon nanotubes is 2-6nm, and the average length is 5-30um, and then add 45mL of 200-mesh pure copper powder into the resulting solution In the process, under the conditions of frequency 59Hz, power 60W, and water bath temperature of 50°C, the water bath is ultrasonically combined with mechanical stirring until the absolute ethanol is completely volatilized, and the evenly mixed powder is placed in a vacuum drying oven. 1.5×10 ﹣2 Dry at MPa for 24 hours. Put the dried powder into a powder metallurgy mold, and unidirectionally press it into a cylindrical billet with a diameter of 40 mm and a height of 12 mm under a pressure of 100 MPa. The density reaches 67.4% after holding the pressure for 5 minutes. Put the compact into an argon-protected sintering furnace, heat up to 350°C at a rate of 15°C / min, keep it warm for 15 minutes, continue...

Embodiment 3

[0057] Dissolve 2.5mL of nickel-plated / copper single-walled carbon nanotubes in 60mL of absolute ethanol, the average diameter of single-walled carbon nanotubes is 2-6nm, and the average length is 5-30um, and then add 47.5mL of 200-mesh pure copper powder In the obtained solution, under the conditions of frequency 59Hz, power 100W, and water bath temperature of 60°C, the water bath is ultrasonically combined with mechanical stirring until the absolute ethanol is completely volatilized, and the evenly mixed powder is placed in a vacuum drying oven. The degree is 1.5×10 ﹣2 Dry at MPa for 24 hours. Put the dried powder into a powder metallurgy mold, cold isostatically press it into a cylindrical billet with a diameter of 40 mm and a height of 12 mm under a pressure of 200 MPa, hold the pressure for 15 minutes, and the density reaches 65.4%. Put the compact into an argon-protected sintering furnace, heat up to 350°C at a rate of 15°C / min, keep it for 15 minutes, continue heating ...

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Abstract

The invention discloses a high-strength and high-conductivity carbon nano tube strengthening copper-based composite material and a preparing method thereof, and belongs to the technical field of composite materials and preparation of the composite materials. The preparation method includes the steps that, water bath ultrasonic agitation is carried out on 0.1% to 10% of a nickel / copper plating single wall carbon nano tube by volume fraction and 90% to 99.9% of pure copper powder or copper alloyed powder by volume fraction in absolute ethyl alcohol; cold pressing is carried out after vacuum drying is carried out to form a blank; preserving sintering, high temperature forging, repeated pressing, machining and cold extruding are carried out; and the high-strength and high-conductivity carbon nano tube strengthening copper-based composite material is obtained. The high-strength and high-conductivity carbon nano tube strengthening copper-based composite material has the beneficial effects that the single wall carbon nano tube in the composite material is evenly dispersed into a metallic matrix and is arranged in an orientation manner in the axial direction. The composite material has the excellent macroscopic combination property in the carbon nano tube orientation direction, has the mechanical property, the thermal conductivity and the electrical conductivity, can be widely applied to the field of preparing resistance spot welding electrodes, electric arch sliding plates, integrated circuit lead frames, relay supports and the like, and is particularly suitable for preparing spot welding electrode heads.

Description

technical field [0001] The invention belongs to the technical field of composite materials and their preparation, and in particular relates to a single-wall carbon nanotube reinforced copper-based composite material with excellent mechanical properties and conductive properties and a preparation method thereof. Background technique [0002] In the fields of electric power, electrical electronics, microwave, aerospace, automobiles, etc., many parts such as pantograph slides, integrated circuit lead frames, relay supports, microwave tube grids, resistance spot welding electrodes, etc. require high strength and hardness of the materials used , strong resistance to high temperature softening, but also high electrical and thermal conductivity. The hardness of such high-strength and high-conductivity materials is generally above 160-180HV, and the relative conductivity is above 80% IACS. [0003] Although pure copper and copper alloys have good thermal conductivity and electrical...

Claims

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Application Information

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IPC IPC(8): C22C47/14C22C49/02C22C49/14C22C101/10C22C121/02
Inventor 郑重董仕节赵杉肖岸纯罗平李四年李连杰黄子昕
Owner HUBEI UNIV OF TECH
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