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Rare earth modified graphene copper-based composite material and preparation method and application thereof

A technology of copper-based composite materials and rare earth modification, which is applied in the field of materials to achieve the effect of reducing electrical conductivity and improving mechanical strength

Active Publication Date: 2022-05-13
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For copper contact wires, there has long been a tension between high strength and high conductivity

Method used

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  • Rare earth modified graphene copper-based composite material and preparation method and application thereof
  • Rare earth modified graphene copper-based composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Weigh 1g of flake graphite material and 200mg of dodecylamine, measure 10ml of sec-butanol, put flake graphite, dodecylamine and sec-butanol into a 100ml ball mill jar, and ball mill at a speed of 400r / min After 24 hours, the ball mill products were separated in different centrifugal intervals (0-2000r / min, 2000-6000r / min, 6000-9000r / min, >9000r / min) to obtain graphene products in different centrifugal intervals, and then 9500r / min The centrifugal product of / min is centrifuged and washed, and circulates 3 times, and the graphene product of last dodecylamine modification is redispersed in sec-butanol for subsequent use, promptly obtains the graphene dispersion liquid of surface-modified dodecylamine.

[0048] (2) The copper mirror reaction in the graphene dispersed organic system was used to prepare the graphene-copper matrix composite material. Firstly, 31.4162g Cu(CH 3 COO) 2 ·H 2 O was dissolved in 50 mL of sec-butanol to form Cu(CH 3 COO) 2 ·H 2 O organic s...

Embodiment 2

[0051] (1) Weigh 1g of flake graphite material and 200mg of dodecylamine, measure 10ml of sec-butanol, put flake graphite, dodecylamine and sec-butanol into a 100ml ball mill jar, and ball mill at a speed of 400r / min After 24 hours, the ball mill products were separated in different centrifugal intervals (0-2000r / min, 2000-6000r / min, 6000-9000r / min, >9000r / min) to obtain graphene products in different centrifugal intervals, and then 8000r / min The centrifuged products in different intervals / min were centrifuged and washed, and circulated for 3 times, and the last dodecylamine-modified graphene product was redispersed in sec-butanol for subsequent use, to obtain a surface-modified graphene dispersion of dodecylamine.

[0052] (2) The graphene-copper matrix composite was prepared by using the copper mirror reaction in the graphene-dispersed organic system. First, 15.7081g Cu(CH 3 COO) 2 ·H 2 O was dissolved in 10 mL of sec-butanol to form Cu(CH 3 COO) 2 ·H 2 O organic soluti...

experiment example

[0055] The rare earth modified graphene copper-based composite material obtained by the embodiment is prepared as a contact wire, and its performance is tested according to corresponding national standards, and its inspection items and methods and performance requirements are as shown in table 1:

[0056] Table 1 Reliability indicators and application environment indicators of graphene copper-based materials

[0057]

[0058] The test results show that: the contact angle between rare earth oxide and copper substrate is less than 60 degrees, the grain size is less than 1 micron, the material strength is not less than 800MPa, the conductivity is not less than 110IACS%, and the elongation is not less than 3.0%. It is superior to the level of similar foreign products, and its advantages can occupy a clear advantage in the high-speed railway market, with huge economic benefits.

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Abstract

The invention belongs to the field of modification of graphene copper-based composite materials in the field of materials, and particularly relates to a rare earth modified graphene copper-based composite material and a preparation method and application thereof. The preparation method comprises the specific steps that graphite, organic amine and an alcohol substance are subjected to ball milling and then separated in different centrifugal intervals, the obtained product is dispersed into the alcohol substance to obtain dispersion liquid, then the dispersion liquid and copper salt are subjected to a copper mirror reaction and reduced to prepare the graphene copper-based composite material, the graphene copper-based composite material and rare earth oxide are mixed and subjected to ball milling to obtain mixed powder, and the graphene copper-based composite material is prepared. And finally, spark plasma sintering is conducted, and the rare earth modified graphene copper-based composite material is obtained. The graphene copper-based composite material is prepared by constructing a uniform and stable graphene-amine salt-copper ion system, and the problem that the interface bonding property between graphene and copper is poor is solved; the design and preparation of the rare earth oxide dispersion strengthened copper-based composite material are provided, and the mechanical strength of the copper-based composite material can be greatly improved while the conductivity is not obviously reduced.

Description

technical field [0001] The invention belongs to the field of materials, in particular to the field of modification of graphene copper-based composite materials, in particular to a rare earth modified graphene copper-based composite material and its preparation method and application. Background technique [0002] High-strength and high-conductivity copper alloys refer to a class of copper alloy materials that have both high strength and high conductivity, and are widely used in the fields of electric power, electronics, automobiles, home appliances, aerospace, military and nuclear energy. In recent years, with the rapid development of railway electrification, the speed of railway transportation has been increased again and again, and the performance requirements for contact wires for electrified railways are getting higher and higher. Especially for the new generation of 400km / h high-speed rail, copper-based contact wires need to be further improved in many aspects such as e...

Claims

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Application Information

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IPC IPC(8): C22C1/05B22F3/14B22F9/04B22F9/24C22C9/00G06N20/00C01B32/194H01B1/02H01B13/00B60M1/13
CPCC22C1/05B22F3/14B22F9/04B22F9/24C22C9/00C22C32/0021G06N20/00C01B32/194H01B1/026H01B13/00B60M1/13B22F2009/043B22F2998/00B22F2202/06
Inventor 薛冬峰黄维扬王鑫王晓明
Owner SHENZHEN INST OF ADVANCED TECH
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