A kind of cnts and cnfs synergistically reinforced copper matrix composite material and preparation method

A copper-based composite material and surface modification technology, applied in the field of composite materials, can solve the problems of easy aggregation and accumulation, difficult to evenly disperse, difficult to interface with

Active Publication Date: 2018-06-12
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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  • A kind of cnts and cnfs synergistically reinforced copper matrix composite material and preparation method
  • A kind of cnts and cnfs synergistically reinforced copper matrix composite material and preparation method
  • A kind of cnts and cnfs synergistically reinforced copper matrix composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Add CNTs to 10 μg / ml gallic acid aqueous solution and disperse evenly. The ratio of the weight of CNTs to the volume of gallic acid aqueous solution is 0.1g:40ml; let it stand for 24 hours, filter, and take the filter residue and dry it in vacuum at 60°C for 2 hours , to obtain surface-modified CNTs.

[0057] 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.

[0058] 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...

Embodiment 2

[0062] Add CNFs to 0.02 μg / 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 stand for 24h, filter, and take the filter residue and dry it in vacuum at 60°C for 2h , to obtain surface-modified CNFs.

[0063] 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.

[0064] Using the above method, the modified graphene (CNFs) was prepared sequentially with rutin aqueous solutions with concentrations of 0.2 μg / ml and 2 μg / ml, and the Fourier transform infrared...

Embodiment 3

[0067] (1) Take the surface-modified CNTs and surface-modified CNFs prepared in Example 1 and Example 2 (both are the modified CNTs and modified CNFs with the best performance prepared in Example 1-2, That is, 10 μg / ml gallic acid, 0.02 μg / ml rutin-modified CNTs and CNFs, the following examples are the same); (2) By weight, 0.8 parts of CNTs and 0.2 parts of CNFs, 3 parts graphite powder, 10 parts Ti 3 SiC 2 powder, 0.1 parts 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 minutes, so that the powders were mixed evenly to obtain a composite powder; (3) The composite powder was hot-pressed and sintered for 2 hours, and then The temperature of pressure sintering is 950°C, the pressure is 28MPa, and the copper-based composite block material is obtained by cooling with the furnace; (4) The obtained block material is subjected to hot isostatic pressing for 2 hours, and the hot isostatic pr...

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Abstract

The invention discloses a CNTs and CNFs synergistically reinforced copper-based composite material, comprising the following components by weight percentage: the sum of the mass fractions of the surface-modified CNFs and the surface-modified CNTs is 0.1-5%; The content is 0.5-8%, the Ti3SiC2 content is 6-15%, the content of La element is 0.01-0.5%, and the balance is copper; the surface-modified CNTs are obtained by modifying the gallic acid aqueous solution; the Surface-modified CNFs were obtained by modification with rutin aqueous solution. In the copper-based composite material of the invention, CNTs and CNFs have good dispersibility, low impurity content, and maintain a complete surface morphology, and play a co-reinforcing role with graphite powder, Ti3SiC2 powder, La and copper matrix, and significantly improve the copper matrix. The mechanical and friction and wear properties of matrix composites, while also having excellent 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-layer or multi-layer graphite sheets, and have excellent mechanical, electrical and thermal properties. Graphene is also called carbon nanosheet CNFs (Carbon Nanoflakes). The arrangement of carbon atoms in graphene is the same as that of graphite. It is a single layer of carbon atoms arranged in a honeycomb crystal lattice with sp2 hybrid orbitals. two-dimensional crystal. 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 cerami...

Claims

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Application Information

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Patent Type & Authority Patents(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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