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Method for preparing graphene-metal composite material based on pulse magnetic oscillation

A metal composite material, graphene technology, applied in graphene, nano carbon and other directions, can solve the problem of poor bonding strength between graphene and metal, and achieve the effects of stable product quality, strong convection, and metal grain refinement

Active Publication Date: 2017-09-08
玛雅森林(北京)国际科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention integrates the preparation and compounding of graphene, and solves the defects that graphene is difficult to uniformly disperse in the metal matrix in the traditional method, and the interface bonding strength between graphene and metal is poor. The most important thing is to creatively prepare graphite by pulse magnetic oscillation Graphene-metal composite materials can ensure that graphene is uniformly dispersed in metals and at the same time obtain composite materials with smaller grain size, which is conducive to improving its mechanical properties and thermal properties, and has a good application prospect

Method used

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  • Method for preparing graphene-metal composite material based on pulse magnetic oscillation
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Effect test

Embodiment 1

[0030] A method for preparing graphene-metal composite materials based on pulsed magnetic oscillation, the specific process of preparing graphene-metal composite materials is as follows:

[0031] First, add 5kg of natural flake graphite to 2kg of concentrated sulfuric acid, then add 7kg of acetic anhydride, 0.5kg of hydrogen peroxide and 0.6kg of potassium dichromate in sequence, stir continuously, react at 40°C for 70min, wash until neutral, and Dry at 60°C. It is then exfoliated at a high temperature of 900 °C to obtain expanded graphite. Then, heat and melt 100kg of metal aluminum in a resistance furnace, and preheat the crucible equipped with a temperature acquisition device at the same time. After pouring the molten aluminum into the crucible at 700°C, add the pretreated expanded graphite Disperse evenly on the surface of metal aluminum melt and keep it warm for 30min. When the temperature of the metal aluminum melt drops below the liquidus line, the crucible is placed ...

Embodiment 2

[0034] A method for preparing graphene-metal composite materials based on pulsed magnetic oscillation, the specific process of preparing graphene-metal composite materials is as follows:

[0035] First, add 5kg of natural flake graphite to 2.5kg of concentrated sulfuric acid, then add 7.6kg of acetic anhydride, 0.4kg of hydrogen peroxide and 0.7kg of potassium dichromate in sequence, keep stirring, react at 50°C for 60min, and wash until neutral. and dried at 60°C. It is then exfoliated at a high temperature of 900 °C to obtain expanded graphite. Then, heat and melt 111kg of metal aluminum in a resistance furnace, and preheat the crucible equipped with a temperature acquisition device at the same time, pour the molten aluminum into the crucible at 720°C, add the pretreated expanded graphite Disperse evenly on the surface of metal aluminum melt and keep it warm for 30min. When the temperature of the metal aluminum melt drops below the liquidus line, the crucible is placed in ...

Embodiment 3

[0038] A method for preparing graphene-metal composite materials based on pulsed magnetic oscillation, the specific process of preparing graphene-metal composite materials is as follows:

[0039] First, add 5kg of natural flake graphite to 3kg of concentrated sulfuric acid, then add 6.8kg of acetic anhydride, 0.6kg of hydrogen peroxide and 0.6kg of potassium dichromate in sequence, stir continuously, react at 55°C for 50min, wash until neutral, and Dry at 60°C. It is then exfoliated at a high temperature of 900 °C to obtain expanded graphite. Then, heat and melt 125kg of metal aluminum in a resistance furnace, and preheat the crucible equipped with a temperature acquisition device at the same time. After pouring the molten aluminum into the crucible at 720°C, add the pretreated expanded graphite Disperse evenly on the surface of metal aluminum melt and keep it warm for 30min. When the temperature of the metal aluminum melt drops below the liquidus line, place the crucible in...

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Abstract

The invention belongs to the technical field of graphene-metal composite material preparing, and provides a method for preparing a graphene-metal composite material based on pulse magnetic oscillation. According to the method, in the metal condensation process, a pulsed magnet field is adopted, graphite is constantly stretched and peeled into graphene, meanwhile, metal branch crystals are crushed through electromagnetic vibration force, the graphene makes face contact with metal on a grain layer, and the graphene-metal composite material with the fine grain and the evenly-scattered graphene is obtained. Compared with a traditional method, the graphene can be prepared through peeling, and the problem about dispersibility of the graphene is solved; and meanwhile, the prepared composite material has the smaller grain size, and the mechanical performance is more excellent.

Description

technical field [0001] The invention relates to the field of preparation of graphene-metal composite materials, in particular to a method for preparing graphene-metal composite materials based on pulsed magnetic oscillation. Background technique [0002] In recent years, metal matrix composites have received widespread attention, and they have great application potential in aerospace, military, rail transportation, thermal control materials, and other civilian fields. The United States, Japan, and the United Kingdom have conducted research on metal matrix composites earlier and invested heavily. my country is still in its infancy, and has not yet formed a complete R&D and production industry. Due to the strict confidentiality of related technologies and products in foreign countries, the possibility of transferring related technologies is very small. my country needs to invest a lot of research in this area and develop metal matrix composite materials with independent intell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/10C22C32/00C01B32/19
CPCC22C1/1005C22C1/1036C22C32/0084C22C1/1047
Inventor 陈庆曾军堂陈兵
Owner 玛雅森林(北京)国际科技有限公司
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