Atmosphere control powder metallurgy preparation method of graphene reinforced aluminum matrix composite

A technology for strengthening aluminum matrix and composite materials, applied in the field of metal matrix composite materials, can solve the problems of uncontrollable aluminum powder oxidation reaction, composite material failure, affecting the macroscopic plasticity of composite materials, etc., and achieve excellent mechanical and electrical properties and structural integrity. Good and beneficial to large-scale production

Active Publication Date: 2021-09-07
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this preparation process cannot control the oxidation reaction of aluminum powder during the preparation process, and the obtained composite materials (especially pure aluminum matrix composite materials) may fail prematurely, which will affect the macroscopic plasticity of composite materials.

Method used

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  • Atmosphere control powder metallurgy preparation method of graphene reinforced aluminum matrix composite
  • Atmosphere control powder metallurgy preparation method of graphene reinforced aluminum matrix composite
  • Atmosphere control powder metallurgy preparation method of graphene reinforced aluminum matrix composite

Examples

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Effect test

Embodiment 1

[0062] This implementation provides a kind of graphene-enhanced aluminum matrix composite material (containing graphene 0.5wt.%) atmosphere control powder metallurgy preparation method, such as figure 1 As shown, the steps are as follows:

[0063] In a glove box with inert gas (argon) protection, take 99.5g, 10μm pure aluminum powder (spherical powder) and 0.5g graphene and place them in a planetary ball mill, add 1g stearic acid as a ball milling process control agent, and use stainless steel The ball is the ball milling medium, the ball-to-material ratio is 4:1, and the ball is milled at a speed of 500 rpm for 2 hours to obtain a graphene / aluminum composite powder, and the above composite powder is decomposed at 400°C under the same inert gas atmosphere. After gas treatment for 1 hour, hot press at 500°C and 600MPa for 1 hour to form a green body with a diameter of 40 mm (section as figure 2 shown in a). Take out the blank from the glove box, anneal at 300°C for 1 hour, a...

Embodiment 2

[0071] This implementation provides an atmosphere-controlled powder metallurgy preparation method of a graphene-enhanced aluminum matrix composite material (containing graphene 0.1wt.%), the steps are as follows:

[0072] In a glove box with inert gas (argon) protection, take 99.9g, 10μm pure aluminum powder (spherical powder) and 0.1g graphene and place them in a planetary ball mill, add 1g stearic acid as a ball milling process control agent, and use stainless steel The ball is the ball milling medium, the ball-to-material ratio is 4:1, and the ball is milled at a speed of 500 rpm for 2 hours to obtain a graphene / aluminum composite powder, and the above composite powder is decomposed at 400°C under the same inert gas atmosphere. After gas treatment for 1 hour, it was hot-pressed at 500°C and 600 MPa for 1 hour to form a green body with a diameter of 40 mm. Take out the blank from the glove box, anneal at 300°C for 1 hour in a muffle furnace, then hot-roll at 500°C to 1mm (70...

Embodiment 3

[0074] This implementation provides an atmosphere-controlled powder metallurgy preparation method of a graphene-enhanced aluminum-based composite material (graphene-containing 6wt.%), the steps are as follows:

[0075] Take 94g, 10μm pure aluminum powder (spherical powder) and 6g graphene in a glove box with inert gas protection (nitrogen) and place them in a planetary ball mill, add 1g stearic acid as a ball milling process control agent, and use stainless steel balls as ball milling Medium, the ball-to-material ratio is 4:1, and the graphene / aluminum composite powder is obtained by ball milling at a speed of 500 rpm for 2 hours. The above composite powder is degassed at 400°C for 1 hour under the same inert gas atmosphere. Afterwards, under the conditions of 500°C and 600MPa, it was hot-pressed for 1 hour to form a green body with a diameter of 40mm. The blank was taken out from the glove box, annealed at 300°C for 1 hour in a muffle furnace, then hot-rolled at 500°C to 1mm ...

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Abstract

The invention provides an atmosphere control powder metallurgy preparation method of a graphene reinforced aluminum matrix composite. The method comprises the following steps of preparing a graphene-aluminum composite blank material through ball milling and hot pressing in an inert gas atmosphere in advance, annealing, and conducting densification processing such as hot rolling / hot extrusion and the like and cold drawing processing to finally obtain the composite. According to the preparation method, the uniformly-dispersed graphene-aluminum composite blank can be obtained through ball milling and hot pressing under the protection of the inert gas atmosphere, meanwhile, the aluminum matrix can be effectively prevented from being oxidized, and the oxygen content of the composite is reduced; and the mechanical and electrical properties of the composite are further improved through cold drawing processing after densification processing. The oxygen content of the composite is reduced to the maximum extent, the strengthening potential and performance advantages of graphene are exerted, energy and time are saved, and the method is suitable for batch preparation and production.

Description

technical field [0001] The invention relates to the technical field of metal-matrix composite materials, in particular to an atmosphere-controlled powder metallurgy preparation method of graphene-reinforced aluminum-matrix composite materials. Background technique [0002] Aluminum and its alloys have received widespread attention due to their low density, high specific strength, and specific modulus. Aluminum alloys are widely used in many fields such as aviation, aerospace, transportation, construction and sporting goods. In recent years, aluminum and its alloys with good conductivity have become the first choice for long-distance transmission line materials. With the rapid development of high-tech fields such as aerospace and long-distance power transmission, it is difficult for a single material to meet the requirements of complex, harsh and diverse environments. Compounding has become a trend in the development of materials. Adding special properties or excellent compre...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C21/00B22F1/00B22F3/14B22F3/24B22F9/04
CPCC22C1/05C22C21/00B22F9/04B22F3/14B22F3/24B22F2009/043B22F2003/248
Inventor 郭强蒂姆韩一帆杨淦婷张荻
Owner SHANGHAI JIAO TONG UNIV
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