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A kind of high-strength heat-resistant graphene-aluminum composite conductor material and preparation method thereof

A conductive material, graphene technology, applied in the direction of conductive materials, conductive materials, metal/alloy conductors, etc., can solve the problems of composite materials such as the decline in tensile strength at room temperature, and achieve simple preparation methods, good mechanical properties and heat resistance, significant effect

Active Publication Date: 2021-05-14
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After searching, it was found that the document "On the thermal stability of ultrafine-grained Al stabilized by in-situ amorphous Al2O3 network, Materials Science and Engineering A, 2015; 648: 61-71" reported that the surface of aluminum powder was amorphous Al 2 o 3 Significantly improve the thermal stability of the material, but after heat treatment at a higher temperature, the amorphous alumina is transformed into γ-Al 2 o 3 , making the room temperature tensile strength of the composite slightly decrease

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  • A kind of high-strength heat-resistant graphene-aluminum composite conductor material and preparation method thereof
  • A kind of high-strength heat-resistant graphene-aluminum composite conductor material and preparation method thereof

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Embodiment 1

[0031] This embodiment provides a high-strength heat-resistant graphene-aluminum composite conductor material. The composite conductor material is composed of the following components in mass percentage: graphene is 0.2%, and the rest is aluminum.

[0032] The above-mentioned high-strength heat-resistant graphene-aluminum composite conductor material can be prepared by the following method, and the specific preparation method includes the following steps:

[0033] Step 1, using aluminum powder with a sphere diameter of 0.5 μm and a graphene powder with a sheet diameter of 0.1 μm and a thickness of 5 nm with a purity of more than 99.9% as raw materials. The composite conductor material is formulated according to the mass percentage of the following components: 0.2% of graphene, and the rest is aluminum. Mix aluminum powder and graphene powder evenly by high-energy ball milling. During the ball milling process, the O content is 200ppm, the ball milling speed is 300rpm, and the b...

Embodiment 2

[0043] This embodiment provides a high-strength heat-resistant graphene-aluminum composite conductor material. The composite conductor material is composed of the following components in mass percentage: graphene is 0.2%, and the rest is aluminum.

[0044] The above-mentioned high-strength heat-resistant graphene-aluminum composite conductor material can be prepared by the following method, and the specific preparation method includes the following steps:

[0045] Step 1, using aluminum powder with a sphere diameter of 0.5 μm and a graphene powder with a sheet diameter of 0.1 μm and a thickness of 5 nm with a purity of more than 99.9% as raw materials. The composite conductor material is formulated according to the mass percentage of the following components: 0.2% of graphene, and the rest is aluminum. Mix aluminum powder and graphene powder evenly by high-energy ball milling method. During the ball milling process, the O content is 1000ppm, the ball milling speed is 300rpm, a...

Embodiment 3

[0051] This embodiment provides a high-strength heat-resistant graphene-aluminum composite conductor material. The composite conductor material is composed of the following components in mass percentage: graphene is 0.5%, and the rest is aluminum.

[0052] The above-mentioned high-strength heat-resistant graphene-aluminum composite conductor material can be prepared by the following method, and the specific preparation method includes the following steps:

[0053] Step 1, using aluminum powder with a spherical diameter of 325 mesh (44 μm) and graphene powder with a sheet diameter of 2 μm and a layer thickness of 10 nm as raw materials. The composite conductor material is formulated according to the mass percentage of the following components: 0.5% of graphene, and the rest is aluminum. Mix aluminum powder and graphene powder uniformly by high-energy ball milling method, and ball mill at 300rpm for 5h in an argon atmosphere with an O content of 700ppm during the ball milling pr...

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Abstract

The invention provides a high-strength heat-resistant graphene-aluminum composite conductor material and a preparation method thereof. The composite conductor material is composed of the following components in mass percentage: graphene is 0.2-1%, and the rest is aluminum; powder and graphene powder are evenly mixed, and the weak oxygen content in the ball mill tank is used in the ball milling process to obtain uniform nano-scale amorphous Al on the surface of the aluminum powder 2 o 3 , and then the mixed powder is sintered to obtain a billet, and further deformed by extrusion or rolling to obtain a dense composite material. The present invention uses air as an oxygen source to react in situ to form dispersed amorphous Al 2 o 3 , effectively realized the dispersed distribution of nano-scale strengthening phase, combined with the thermal stability of high-strength and high-conductivity graphene, the composite material has good mechanical properties and heat resistance, and maintains good electrical conductivity. The tensile strength is greater than 250MPa, The highest reaches 328MPa.

Description

technical field [0001] The invention relates to the technical field of heat-resistant metal-based composite materials, in particular to a high-strength heat-resistant graphene-aluminum composite conductor material and a preparation method thereof. Background technique [0002] The geographical characteristics of China's west-to-east power transmission determine that the current overhead conductors need to face diversified needs such as "high strength", "high conductivity", "light weight" and "heat resistance". At present, heat-resistant aluminum alloy conductors for power transmission and transformation are usually refined by adding trace alloy elements on the basis of 99.7% or more pure aluminum. The main method of traditional heat-resistant aluminum alloy design is to introduce alloy elements with low solid solubility and low diffusion coefficient into the aluminum matrix to form a dispersed phase with strong thermal stability and not easy to coarsen in the aluminum matrix...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/05C22C1/10H01B1/02H01B13/00
CPCC22C1/05C22C21/00C22C32/0036C22C32/0084H01B1/023H01B13/00
Inventor 高海燕李敏王朦朦张驰王俊疏达梁加淼孙宝德
Owner SHANGHAI JIAOTONG UNIV
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