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A preparation method of graphene-reinforced aluminum-matrix composite microfibers

A composite material and reinforced aluminum-based technology, which is applied in the field of preparation of graphene-reinforced aluminum-based composite microfibers, can solve problems such as chaos, graphene sheet agglomeration and orientation, and achieve adjustable shape, uniform distribution of reinforcements, and uniform high density effect

Active Publication Date: 2019-06-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems that the traditional powder metallurgy process cannot realize the uniform dispersion of graphene nanosheets, resulting in the agglomeration of graphene sheets and disordered orientation in composite materials.

Method used

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  • A preparation method of graphene-reinforced aluminum-matrix composite microfibers
  • A preparation method of graphene-reinforced aluminum-matrix composite microfibers
  • A preparation method of graphene-reinforced aluminum-matrix composite microfibers

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Experimental program
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specific Embodiment approach 1

[0026] Embodiment 1: In this embodiment, the content of graphene in the as-cast graphene-reinforced aluminum matrix composite material is 1 vol%, the matrix is ​​pure aluminum, and the elongation at room temperature is 23±2%. According to the cold drawing die size, determine initial pass cold drawing rod sample diameter, be cut into rod shape, diameter Φ=3mm; The preparation method of graphene-reinforced aluminum-matrix composite material micron fiber is to carry out as follows:

[0027] Step 1. The rod-shaped cast graphene-reinforced aluminum matrix composite material is subjected to an interface regulation heat treatment for 0.5h under the protection of an argon atmosphere at a temperature of 630°C, and then the surface of the sample is polished and polished step by step with sandpaper. The polishing process is carried out with distilled water Cool and polish until the diameter is uniform and there are no cracks or scratches on the surface, that is, the surface roughness is b...

specific Embodiment approach 2

[0035] Specific embodiment two: In this embodiment, the content of graphene in the cast graphene-reinforced aluminum-based composite material is 5vol%, the matrix is ​​pure aluminum, and the elongation at room temperature is 15 ± 2%, which is determined according to the size of the cold drawing die The diameter of the initial pass cold-drawn rod-shaped sample is cut into rod-shaped, with a diameter of Φ=3mm; the preparation method of graphene-reinforced aluminum matrix composite micron fibers is carried out in the following steps:

[0036] Step 1. The rod-shaped cast graphene-reinforced aluminum matrix composite material is subjected to an interface regulation heat treatment for 0.5h under the protection of an argon atmosphere at a temperature of 630°C, and then the surface of the sample is polished and polished step by step with sandpaper. The polishing process is carried out with distilled water Cool and polish until the diameter is uniform and there are no cracks or scratche...

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Abstract

The invention discloses a preparation method of graphene reinforced aluminum base composite micrometer fiber and belongs to the field of graphene reinforced composite micrometer fiber. By means of thepreparation method, the problems that graphene sheet agglomeration and orientation disorder are caused since a traditional powder metallurgical technique can not achieve the effect of evenly dispersing graphene nano sheets are solved. The preparation method comprises the steps that one, a rodlike as-cast condition graphene reinforced aluminum base composite is subjected to interface regulation and control heat treatment, is ground to be uniform in diameter and is polished, and thus a rod is obtained; two, one end of the rod is subjected to corrosion treatment and water washing and drying; three, the rod is placed in a drawing die, the drawing die is arranged in a drawing device, cold drawing treatment is carried out, interface reinforcement heat treatment is carried out by one time per 5-10 passes, and annealing treatment is carried out by one time per 1-2 passes; and four, the annealing treatment is carried out under an inert atmosphere, so that the micrometer fiber is obtained. Thegraphene reinforced aluminum base composite is high in density, reinforcement bodies are distributed uniformly and are adjustable in shape, and the mechanical property is improved.

Description

technical field [0001] The invention belongs to the field of graphene-reinforced composite micron fibers; be specifically related to a preparation method of graphene-reinforced aluminum matrix composite micron fibers. Background technique [0002] Graphene-reinforced aluminum matrix composites are a new type of metal matrix composites with excellent mechanical and physical properties. In recent years, microelectromechanical systems have developed rapidly, showing broad application prospects in artificial intelligence and other fields, requiring the carrier materials used to have the characteristics of structural and functional integration, high performance, and small size. As a high-performance structure-functional integration material, the micro-fiber material prepared by graphene-reinforced aluminum matrix composite has broad application prospects in the field of micro-electromechanical systems. [0003] Realizing the uniform distribution of graphene in the aluminum matri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22F1/04C22F1/02C23F1/20
CPCC22C21/00C22F1/02C22F1/04C23F1/20
Inventor 张学习李建超钱明芳耿林
Owner HARBIN INST OF TECH