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A kind of preparation method of porous metal/nano-carbon phase composite material with multilayer structure

A technology for porous metal and composite materials, which is applied in the field of preparation of porous metal/nano-carbon phase composite materials, can solve the problems of non-wetting, inability to disperse uniformly, and inability to synthesize composite materials, and achieves strong interface bonding and simplified process. Effect

Active Publication Date: 2018-11-06
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, carbon nanotubes and graphene carbon phases are destroyed in the preparation of powder metallurgy, burned out when stirred in the metal melt, cannot be uniformly dispersed in the melt, and float on the surface of the melt without wetting with the metal melt , unable to synthesize composite materials, etc.

Method used

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  • A kind of preparation method of porous metal/nano-carbon phase composite material with multilayer structure
  • A kind of preparation method of porous metal/nano-carbon phase composite material with multilayer structure
  • A kind of preparation method of porous metal/nano-carbon phase composite material with multilayer structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Carbon nanotube pretreatment

[0042] Select carbon nanotubes with an average diameter of 30-80 nm and a length of 5-15 µm as raw materials for pretreatment, that is, carbon nanotubes are heated to 180 °C and kept for 5 hours to remove some impurities and water.

[0043] (2) Preparation of carbon nanotube dispersion:

[0044] Put 1.5 g of carbon nanotubes pretreated in step (1) into 300 ml of hydrogen peroxide solution with a concentration of 6% by mass, and soak for 5 hours; The speed is 4000 rev / min, cooled to room temperature, and after standing still for 20 hours, the carbon nanotube mixture was treated with an ultrasonic cleaner for 30 minutes at a frequency of 45kHZ, cooled to room temperature, and after standing still for 20 hours, the carbon nanotube mixture was Mechanical mixer 1500 rev / min process 1 hour, cool to room temperature, obtain carbon nanotube dispersion liquid after standing still for 20 hours, see Figure 4 .

[0045] (3) Porous metal surfac...

Embodiment 2

[0062] (1) Graphene pretreatment:

[0063] Graphene with a lateral size of 30-80 µm and a vertical size of 20-50 nm was selected as the raw material for pretreatment, that is, the graphene was heated to 200 °C and kept for 5 hours to remove some impurities and moisture.

[0064] (2) Preparation of graphene dispersion:

[0065] Put 1g of graphene into the mixture of 0.06g of surfactant SDBS (sodium dodecylbenzenesulfonate) and 0.2g of analytically pure Tween-80, and soak for 5 hours to obtain the graphene mixture; the graphene mixture Dispersed by a dispersing emulsifier for 30 minutes, with a rotation speed of 4000 rpm, cooled to room temperature, and left standing still for 20 hours, the graphene mixture was treated by an ultrasonic cleaner for 30 minutes, with a frequency of 50 kHz, cooled to room temperature, and kept standing still for 20 hours Afterwards, the graphene mixture was processed by a mechanical stirrer at 1500 rpm for 1 hour, cooled to room temperature, and le...

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Abstract

The invention discloses a preparation method of a multilayer structural porous metal / nano carbon phase composite material. The technical scheme lies in that laminated porous metal with a moderate thickness and a high open-cell rate is taken as the framework; the framework is loaded with a layer of nano carbon phase film with a uniform thickness; the gaps of the porous metal are filled with an appropriate amount of metal powder for assembling; after accumulative roll-bonding or high pressure torsion, the gaps of the porous metal disappear completely, the porous metal framework after transformation and the carbon phase form a compact multilayer nano structure; nano carbon phase with a high volume ratio is uniformly dispersed in the metal matrix during the solid phase preparation process. According to the preparation method, the process is simple, the operation is convenient, the damage to the nano carbon phase is decreased to the lowest, different carbon phase substances can be compounded with different porous metal and metal powder to form a multilayer nano-crystalline and ultra-fine-crystalline composite material; the prepared product has the characteristics of good plasticity, good toughness, fatigue resistance, high tensile strength, excellent electrical conductivity, nontoxicity and the like.

Description

technical field [0001] The invention relates to a preparation process of a composite material, in particular to a preparation method of a porous metal / nano-carbon phase composite material with a multilayer structure. Background technique [0002] Accumulative roll-bonding (ARB) is a large plastic (SPD) deformation method, which is widely used to prepare large metal sheets with ultrafine grain structure. A new type of layered metal composite material is prepared by using the composite technology of cumulative roll welding to make two or more metals with different physical, chemical and mechanical properties achieve a firm metallurgical bond at the interface, and has been widely used in many fields. Applications. For example, Chinese patent 201310125199.6 discloses a cumulative rolling and heat treatment method to improve the stress relaxation resistance of copper alloys, using elastic copper alloy plates with a thickness of 1-5 mm after solution treatment as raw materials. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/04
CPCB22F7/04B22F2007/042
Inventor 喻亮姜艳丽刘崇宇农晓东高凡罗鲲王春霞周立智
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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