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Preparation method for carbon nanomaterial enhanced aluminum base composite material

A nano-carbon material, a technology for reinforcing aluminum matrix, which is applied in the preparation of composite materials and the field of preparation of nano-carbon material reinforced aluminum matrix composite materials, can solve problems such as precise requirements, save costs, improve mechanical properties, and achieve high density. Effect

Inactive Publication Date: 2013-01-09
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to provide a method similar to powder metallurgy to prepare aluminum-based composite materials, using aluminum instead of molds, and coating powder for processing and forming. This method solves the problem of precise requirements for molds in the powder metallurgy process

Method used

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  • Preparation method for carbon nanomaterial enhanced aluminum base composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 100g of pure aluminum powder (200 mesh particle size) and 1g of graphene, mix thoroughly with a ball mill and put them into the cleaned aluminum tube, compact the mixed powder in the aluminum tube and press the aluminum tube in two stages with a press Seal tightly. The sample is heated to 450°C, and the powder sample is pressed into a prefabricated block with a certain density by a press. The obtained prefabricated block was sintered for 1 hour under the protective environment of argon, and then hot-rolled, and the sintering temperature was 550°C. The tensile strength of the obtained experimental sample at room temperature reaches 142MPa, and the Vickers hardness is about 41kg / mm 2 .

Embodiment 2

[0038] Weigh 100g of pure aluminum powder (with a particle size of 200 mesh) and 5g of copper-coated graphene, mix them thoroughly with a ball mill, put them into a cleaned aluminum tube, compact the mixed powder in the aluminum tube, and use a press to double the aluminum tube. Segment compression seal. The sample is heated to 400°C, and the powder sample is pressed into a prefabricated block with a certain density by a press. The obtained precast was sintered for 1.5h under the protective environment of block argon, and then hot-rolled, and the sintering temperature was 500°C. The tensile strength of the obtained experimental sample at room temperature reaches 160MPa, and the Vickers hardness is about 50kg / mm 2 .

Embodiment 3

[0040] Weigh 100g of pure aluminum powder (with a particle size of 200 mesh) and 3g of copper-coated graphene, mix them thoroughly with a ball mill, put them into a cleaned aluminum tube, compact the mixed powder in the aluminum tube, and press the aluminum tube into two parts with a press. Segment compression seal. Then use a press for cold pressing, and the reduction of cold pressing deformation is greater than that of hot pressing deformation. After cold pressing, the obtained prefabricated blocks were sintered for 2 hours under the protective environment of argon, and then hot-rolled, and the sintering temperature was 550°C. The tensile strength of the obtained experimental sample at room temperature reaches 153MPa, and the Vickers hardness is about 42kg / mm 2 .

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Abstract

The invention discloses a preparation method for a carbon nanomaterial enhanced aluminum base composite material, which is similar to a powder metallurgy method, i.e. an aluminum material cladding powder processing and forming method. The preparation method is mainly used for solving the problem of precise mould requirement in the powder metallurgy process. The method is realized by the following steps of: 1) carrying out annealing treatment to pure aluminum or aluminum alloy material, carrying out alkali liquor cleaning and clean water cleaning to the surface of the pure aluminum or aluminum alloy material, and airing or drying after cleaning; 2) fully mixing and evenly stirring the pure aluminum or aluminum alloy powder with carbon nanomaterial at a certain ratio, i.e. at the mass fraction of the carbon nanomaterial of 0.1-8%; 3) cladding mixed powder by the pure aluminum or aluminum alloy material processed in step 1, compacting, sealing, and pressing into a precast block by a press; and 4) rolling the precast block obtained in step 3 into a final finished product. The preparation method for the carbon nanomaterial enhanced aluminum base composite material, which is disclosed by the invention, has the advantages of low cost, short flow, simpleness in operation and easiness in realizing industrialization.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a nano-carbon material reinforced aluminum-based composite material, belonging to the field of metal-based composite materials. Background technique [0002] Graphene is a new star in materials science and solid state physics. Since 2004, Geim and Novoselov of the University of Manchester in the United Kingdom have used the method of micromechanical exfoliation to peel graphite flakes from thermally expanded graphite to observe single-layer graphene and study its electrical properties. With its unique monoatomic layer thick two-dimensional crystal structure, excellent electrical, optical, thermal and mechanical properties have attracted the attention of many scholars. Graphene is the thinnest known material, only one atomic layer thick (about 0.34nm), but it is also the strongest among known materials, reaching 125GPa, more than 100 times th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C21/00C22C1/05C22F1/04
Inventor 管仁国左良胡芳友冯振仙李喜坤
Owner NORTHEASTERN UNIV
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