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Carbon nanotube and carbon nanofiber synergetic enhanced copper base composite material and preparation method

A copper-based composite material and surface modification technology, applied in the field of composite materials, can solve problems such as difficult interface bonding, poor wettability of metal matrix, easy aggregation and accumulation, etc.

Active Publication Date: 2017-05-10
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem is that CNTs and CNFs are nanomaterials, both of which have large specific surface area and specific surface energy, have a large van der Waals force, are easy to aggregate and accumulate, and are difficult to disperse uniformly in the metal matrix; on the other hand, CNTs There is a large performance difference between CNFs and metal materials, poor wettability with the metal matrix, and it is difficult to form a firm interface bond

Method used

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  • Carbon nanotube and carbon nanofiber synergetic enhanced copper base composite material and preparation method
  • Carbon nanotube and carbon nanofiber synergetic enhanced copper base composite material and preparation method
  • Carbon nanotube and carbon nanofiber synergetic enhanced copper base composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Add CNTs to 10μg / ml gallic acid aqueous solution, and disperse evenly, wherein the ratio of the weight of CNTs to the volume of gallic acid aqueous solution is 0.1g:40ml; let it stand for 24h, filter, take the filter residue and dry it in vacuum at 60°C for 2h, Surface-modified CNTs were obtained.

[0056] Evenly disperse 0.1 g of the surface-modified CNTs prepared in this example in 100 ml of deionized water, and after standing for 3 days, the precipitation gradually increases under the action of gravity, but the CNTs still maintain a dispersed state without agglomeration; at the same time Compared with unmodified CNTs, precipitation occurred after standing for 1 day, and agglomeration occurred among CNTs, indicating that the surface-modified CNTs prepared in Example 1 had excellent dispersibility.

[0057] Using the above-mentioned method, the modified carbon nanotubes were prepared by successively using gallic acid aqueous solutions with a concentration of 5 μg / ml an...

Embodiment 2

[0061] Add CNFs to 0.02μg / ml rutin aqueous solution, and disperse evenly. The ratio of the weight of CNFs to the volume of rutin aqueous solution is 0.1g:40ml; let it stand for 24h, filter, and take the filter residue and dry it in vacuum at 60°C for 2h , to obtain surface-modified CNFs.

[0062] Evenly disperse 0.1 g of the surface-modified CNFs prepared in Example 2 in 100 ml of deionized water. After standing for 5 days, the precipitation gradually increases under the action of gravity, but the CNFs still maintain a dispersed state without agglomeration; At the same time, compared with unmodified CNFs, precipitation occurred after standing for 1 day, and agglomeration occurred between CNFs, indicating that the surface-modified CNFs prepared in Example 2 had excellent dispersibility.

[0063] Using the above method, the modified carbon nanofibers (CNFs) were prepared sequentially with rutin aqueous solutions with concentrations of 0.2 μg / ml and 2 μg / ml, and Fourier transform...

Embodiment 3

[0066] (1) Get the surface-modified CNTs and the surface-modified CNFs (both the modified CNTs and the modified CNFs with the best performance prepared in Example 1-2) prepared in Example 1 and Example 2, That is, 10 μg / ml gallic acid, 0.02 μg / ml rutin modified CNTs and CNFs, the following examples are the same); (2) in parts by weight, adopt agate balls and agate ball jars to mix 0.8 parts of CNTs and 0.2 parts of CNFs, 3 parts graphite powder, 10 parts Ti 3 SiC 2 powder, 0.1 part of La powder and 85.9 parts of copper powder were mixed by ball milling, the speed of rotation was 200 rpm, and the ball milling time was 50 min, so that the powder was mixed evenly to obtain a composite powder; (3) the composite powder was hot-pressed and sintered for 2 hours, and then Pressing and sintering at a temperature of 950°C and a pressure of 28MPa, cooling with the furnace to obtain a copper-based composite block material; (4) subjecting the obtained block material to hot isostatic press...

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Abstract

The invention discloses a CNTs and CNFs synergetic enhanced copper base composite material. The copper base composite material comprises the following components in percentage by weight: the mass fraction sum of surface-modified CNFs and surface-modified CNTs is 0.1-5%; the content of graphite is 0.5-8%; the content of Ti3SiC2 is 6-15%; the content of La element is 0.01-0.5%; and the balance is copper; the surface-modified CNTs is obtained by modifying gallic acid water solution; and the surface-modified CNFs is obtained by modifying rutin water solution. In the copper base composite material, the CNTs and the CNFs are better in dispersibility and low in impurity content, keep complete surface topography, exert common reinforcement effect with graphite powder, Ti3SiC2 powder, La and copper matrix, prominently improve the mechanical performance and the friction wear resistance of the copper base composite material, and meanwhile, are excellent in strength and impact resistance.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a copper-based composite material, in particular to a copper-based composite material synergistically reinforced by CNTs and CNFs and a preparation method thereof. Background technique [0002] CNTs (Carbon NanoTubes, carbon nanotubes) are one-dimensional materials with a seamless hollow tubular structure formed by curling single or multilayer graphite sheets, and have excellent mechanical, electrical and thermal properties. CNFs (CarbonNanoFibers, carbon nanofibers) are carbon atoms with sp 2 The planar film formed by hybridization in the shape of honeycomb lattice is a two-dimensional material with high strength, large specific surface area and good elongation. The excellent properties of CNTs and CNFs make them ideal reinforcement materials. [0003] In recent years, CNTs and CNFs have been rapidly developed in polymer and ceramic composites, but there are many pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/02C22C49/14C22C47/14C22C101/10
CPCB22F2998/10C22C47/14C22C49/02C22C49/14B22F2009/043B22F2003/145B22F3/15
Inventor 蒋小松张归航蒋佳芯付学敏邵甄胰朱德贵朱旻昊
Owner SOUTHWEST JIAOTONG UNIV
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